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104 results on '"Rogg J"'

4. Realization of AlGaAs antidot arrays by pulsed laser interference gratings

Author

Nebel, C.E., Rogg, J., Kelly, M.K., Dahlheimer, B., Rother, M., Bichler, M., Wegscheider, W., and Stutzmann, M.

Subjects
Power semiconductor devices -- Research, Semiconductor doping -- Research, Physics
Abstract

Magnetotransport and atomic force microscopy research shows that AlGaAs antidot arrays produced by single-shot interference processing with a pulsed high-power Nd:YAG laser system are 3 by 3 millimeters in size. Elliptical or circular dot shapes with a diameter of between 255 and 690 nanometers are observed. Laser structuring has little affect on the two dimensional electron density although it significantly reduces mobility by a factor of 30.

Published
1997

5. Facet temperature reduction by a current blocking layer at the front facets of high-power InGaAs/AlGaAs lasers

Author

Rinner, F., Tomm, J.W., Thamm, E., Poprawe R., Rogg, J., Kelemen, M.T., Mikulla, M., and Weimann, G.

Subjects
Nonferrous metals -- Electric properties, Ablation (Vaporization technology) -- Observations, Physics
Abstract

The facet heating of a single-quantum well InGaAs/A1GaAs broad-area high-power laser-diodes emitting at 940 nm was reduced by the introduction of a 30 mu m long current blocking region located at the front facet of the laser. The temperature rise of 2 mm long and 200 mu m wide lasers is reduced by a factor of 3-4.

Published
2003

7. Intravenous NPA for the treatment of infarcting myocardium early; InTIME-II, a double-blind comparison of single-bolus lanoteplase vs accelerated alteplase for the treatment of patients with acute myocardial infarction

Author

Braunwald, E., Neuhaus, K. -L., Antman, E., Chew, P., Skene, A., Wilcox, R., Ambrosioni, E., Anderson, J., Apetrei, E., Bata, I., Carrageta, M., Col, J., Dalby, A., Davies, R., Deckers, J., Eichman, D., Grande, P., Greene, R., Gurfinkel, E., Heikkilä, J., Henry, T., Hillis, D., Hochman, J., Huber, K., Kostis, J., Klinke, P., López-Sendón, J., Mckendall, G., Móller, B., Moore, P., Morris, A., Mueller, H., Östör, E., Oto, A., Ruda, M., Sadowski, Z., Schweiger, M., Sequeira, R., Shah, P., Shannon, R., Smith, B., Sobel, B., Steingart, R., Tebbe, U., Toman, J., Traboulsi, M., Vahanian, A., Warnica, J. W., Willerson, J., Deitchman, D., Davidson, L., Folgia, T., Foxley, A., Goodman, J., Hauck, C., Henry, D., Mccabe, C., Pangerl, A., Thomson, A., Wagner, M., Kennedy, J. W., Cairns, J., Demets, D., Julian, D., Simoons, M., Charlesworth, A., Easton, J. D., Ferbert, A., Feske, S., Kuhn, P., Moseley, J., Rogg, J. M., Reichmann, H., Sloan, M., von Kummer, R., Zamani, A., Coulter, S., Giugliano, R., Skene, A. M., Ardill, R., Ince, Y., Peters, A., Ward, K., Wolf, L., Curtis, N., De Brés, J., Stead, S., Watson, S., Cutler, S., Friedman, J., Helfrick, R., Williams, S., Klimovsky, J., Kumagai, S., Adams, E., Anderson, C., Bauhuber, I., Bennett, L., Biro, E., Boyce, E., Bregman, B., Carvalho, P., Ciganovic, D., Csukas, M., Cuenca, P., De Cuyper, S., Diez, P., Dijkhuizen, M., Dille-Amo, C., Gonzalez-Santis, A., Gursoy, M., Hammarstrom, K., Harasta, E., Ingman, E., Kelemen, B., Keulen, I., Koren, A., Langthaler, G., Lemaire, F., Little, I., Montalban, C., Nijssen, K., Neumueller, I., Palander, M., Pekuri, T., Persson, U., Pilz, J., Oudotova, S., Pisklakov, V., Proinov, F., Ptaszynska, A., Read, J., Retei, S., Romeyer, F., Romanini, M., Saar, L., Salein, D., Samsonov, M., Simeon-Dubach, D., Simmonds, J., Skaza, M., Skvortsova, N., Smidlova, Z., Spitzerova, H., Strijdveen, I., Szajewski, T., Ugurnal, B., Valcarce, M., van Rompaey, I., Walker, A., Zak, E., Zimova, N., Barrero, C., Beck, E., Bruno, M. L., Caccavo, A., Cagide, A., Campo, A., Cermesoni, R., Chahin, M., Dutra, O., Estrada, J., Falu, E. A., Gagliardi, J., Garre, L. E., Liprandi, A. S., Luciardi, H., Mautner, B., Muntaner, J., Nau, G., Salzberg, S., Santopinto, J., Sinisi, A., Torres, H., Eber, B., Elliott, P., Hiemetsberger, H., Juhasz, M., Kühn, P., Leisch, F., Niktardjam, M., Reisinger, J., Schmalix, G., Schuster, R., Sihorsch, K., Silberhauer, K., Slany, J., Steinbach, K., Tragl, K. H., Valentin, A., Al Shwafi, K., Dasnoy, P., De Clippel, M., de Meester, A., De Raedt, H. J. L. P., Emonts, M., Evrard, P., Eycken, M., Geboers, M., Heyndrickx, G., Lauwers, K., Mitrie, K., Pirenne, B., Renard, M., Somers, Y., Timmermans, P., Van Kuyk, M., Van Mieghem, W., Vermeulen, J., Verrostte, J. M., Albuquerque, D., Ayoub, J. C. A., Carvalho, A., Cesar, L., Gebara, O., Golin, V., Knobel, E., Leaes, P., Neto, J. A. M., Nicolau, J. C., Piegas, L. S., Rabelo, A., Rassi, A., Sila, L., Simao, A. F., Ashton, T., Baillie, H., Bhargava, R., Bota, G., Cameron, W., Chan, N., Chan, Y. K., Daly, P. A., Darcel, I., Davies, E., Desjardin, L., Dhingra, S., Ducas, J., Ervin, F. L., Fortin, C., Fowlis, R., Fulop, J., Furey, M., Gagnon, S., Gebhardt, V., Giannaccro, P., Gosselin, G., Graham, J., Grondin, F., Heath, J. W., Henderson, M., Hilton, D. R., Hiscock, J., Hui, W., Kaza, L., Kesselman, T., Kouz, S., Kucerak, M., Lahoude, N., Lamothe, M., Lebouthillier, P., Lenis, J., Levesque, P., Lopez, J. F., Lubelsky, B., Macritchie, D., Mayer, J. -P., Mcdowell, J. D., Montigny, M., Orestien-Lyall, T., Parekh, P., Pistawka, K., Price, J. B., Pruneau, G., Quinn, B., Reid, B. R., Richmond, M., Rose, B., Schuld, R., Sharma, N. K., Shetty, P., Stanton, E., Strauss, H. D., Sussex, B., Theroux, P., Turabian, M., Turner, C., Vizel, S., Walker, M., Weeks, A., Winkler, L., Zacharias, G., Zimmerman, R., Bartolucci, J., Castro, P., Diaz, M. A., Illanes, G., Potthoff, S., Sanchez, E. C., Silva, L. M., Yovanovich, J., Zanetti, F. L., Alan, D., Balázová, K., Boček, P., Cerny, J., Fischerova, B., Holub, M., Hradec, J., Janota, T., Janský, P., Kasper, J., Klimsa, Z., Motovská, Z., Pleva, L., Pluhacek, L., Pšenčka, M., Semrád, B., Spinar, J., Staněk, V., Štípal, R., Suítil, P., Vítovec, J., Wichterie, D., Widimský, P., Zeman, K., Andersen, C. B., Kriegbaum, J., Nielsen, N., Nielsen, P. E., Schou, J. B., Teesalu, R., Voitk, J., Haapamäki, H. V. H., Halkosaari, M., Härkönen, M., Jägerholm, S., Kärjä-Koskenkari, P., Karthunen, P., Kesäniemi, Y. A., Koskivirta, H., Lehto, P., Lilja, M., Paakkinen, S., Palomäki, A. K., Pietilä, K., Tuominen, J., Viopio-Pulkki, L., Ylönen, H., Adi, I., Admant, P., Akadirik, A., Alagha, Z., Alhabaj, S., Amat, G., Andre, A. A., Apffel, F., Aswad, K., Baradat, G., Bareiss, P., Barthers, F. B., Baudet, M., Baudouy, M., Bearez, E. M., Berthou, J. D., Berzin, B., Bessede, G., Blanc, J. J., Bocara, A., Bonneau, A., Bourdad, C., Bouvier, J. M., Cassagnes, J., Cassat, A., Cazaux, P., Charbonnier, B., Clementy, J., Cohen, A., Coisne, D., Colin, P., Croizier, O., D’Hautefeuille, B., D’Ivernois, C., Daumas, P. L., Dauphin, C. L., Deforet, M. F., Degand, B., Dequeker, J. L., Dickele, M. C., Dugrand, P., Durand, S., Ebagosti, A., Elharrar, C., Equine, O., Fichter, E., Flork, L., Fouche, R., Fourchard, V., Fourme, T., Fournier, P. Y., Funck, F., Galley, D., Garbarz, E., Ghadban, W., Gladin, M., Grall, J. Y., Grand, A., Gryman, R., Guillard, N., Guillo, P., Haftel, Y., Hannebicque, G., Henry, R., Huret, J. F., Janin-Magnificat, L., Jarnier, J., Joly, A., Kamal, H., Khalife, A., Roynard, J. L., Lang, M., Lapeyssonnie, A., Ledain, L., Lejeune, P., Lemetayer, L., Lepori, R., Lombart, A., Lusson, J. R., Magnin, O., Marquand, A., Martelet, M. M., Martelli, A., Mathurin, C., Mentre, B., Messager, D., Morizot, M., Mouallem, M. J., Mouhoub, O., Mycimski, C., Nallet, O., Olive, T., Pacouret, G., Palcoux, M. C., Poulard, J. E., Pruvost, A., Quiret, J. C., Richard, C., Richard, P., Rickaud, P., Riehl-Aleil, V., Rifai, A., Rocher, R., Rotreff, P., Segrestin, B., Slama, M. S., Sultan, P., Tabone, X., Talbodec, A., Tissot, M. T., Toussaint, C., Veyrat, A., Zerrouk, Z., Adamczak, M., Altmann, E., Altybernd, B., Andreassen, G., Andresen, D., Appenrodt, H., Bachmann, S., Bäcker, U., Beckert, U., Behr, H. M., Beier, W., Beier, T., Berger, D., Bernsmeier, R., Beythien, R. D., Biechl, E., Biedermann, G., Bischoff, K. O., Blerich, J., Boch, H. B., Bonzel, T., Both, A. R., Breidenbach, K., Breuer, M., Breuer, H. W. M., Brunkhorst, F. B., Bruns, A., Bundschu, H. D., Burkhardt, W., Busse, H. J., Caesar, K., Cailloud, J., Chlosta, A., Chorlanopoulos, E., Consemüller, S., Decker, W., Dichgans, M., Dick, R., Diederich, K. W., Dienst, C., Dietz, A., Dißmann, R., Ditter, H., Doering, W., Drost, H., Dundalek, E. D., Eckardt, D., Edelmann, A., Eggeling, T., Eggert, G., Eichner, R., Endres, C., Engberding, R., Engel, H. J., Faehnrich, A., Fischer, J. L., Flor, A., Forycki, F. Z. F., Froböse, H. J., Fruehauf, T., Fuchs, M., Geiser, R., Geletneky, J., Gerdes, H., Gerecke, B., Gesing, S., Gieser, H., Girth, E., Glogner, P., Glover, M., Goetz, J., Goetz, H., Göttfert, G., Gottwik, M., Gregori, B., Grieshaber, M., Großmann, C., Gruber, G., Gunold, H., Häßler, W. H., Hackenjos, B., Hader, O., Hamer, H., Harmjanz, D., Hasst, G., Haun, H., Hauptmann, K. E., Hegge, F. J., Heinze, A., Heinze, R., Henrichs, K. J., Hergenröther, H., Herrmann, F., Herzig, C., Hey, D., Hill, S., Hinzmann, S., Hoffmann, S., Höfs, T., Höhler, H., Holle, G., Höltman, B. J., Horacek, T., Hossmann, V., Hübner, F. S., Hülskamp, C., Hunecke, R., Hust, M., Jaeckh, G., Jebens, C., Jennen, E., Jost, M., Justiz, R., Kallmann, L., Kalscheur, F., Kaschner, W., Kaspar, W., Kauder, E., Keitel, B., Keller, H., Kemkes, T., Kerler, N., Kester, M., Kettner, W., Kilp, M., Kirklies, A., Klaus, A., Klein, H. H., Klenböck, J. R., Kley, H. K., Klingenbeck, R., Koch, H., Kohler, B., Kohler, J., Kolloch, R., Konermann, M., Körber, H. G., Kother, T. K., Kötter, V., Kottwitz, B., Kozariszcsuk, G., Kracht, T., Kratzsch, G., Kreft, H. U., Kreuter, G., Krönert, H., Krönig, B., Krueger, E., Krülls-Münch, J., Kuckuk, H., Kuelschbach, M., Kuhrt-Lassay, O. W., Kummerhoff, P. W., Kunevt, R., Kurth, C. U., Lang, C., Lange, C., Langhoff, R., Laskus, A., Lazarus, P., Lehmann, H. U., Lenga, P., Lengfelder, W., Leupolz, W., Limbourg, P., Loos, U., Lucanus, W., Machill, K., Mäckel, P., Mackes, K. G., Maier, S., Makowski, B., Mandok, J., Manz, M., Mäurer, W., Meier, F., Meier, J., Menges, M., Merx, W., Meurers, G., Michels, U., Mickeler, C. H., Mons, D., Moos, E., Mueller, R., Müller, G., Nast, H. P., Naumann, G., Nebelsieck, H., Neubaur, J., Niederer, W., Nitsch, J., Noack, J., Nogai, K. F. W., Oberheiden, A., Obst, R., Ochs, H. R., Odemar, F., Odenthal, H. J. B., Offers, E., Öhl, S., Ohlmeier, H. A. R. M., Patzer, P., Pech, A., Peters, U., Petry, U., Pietschmann, G. J., Pistner, W., Plappert, B., Pohlmann, W. K., Pollock, B., Presser, H. J., Przytarski, K., Puerner, K. L., Raouf, N., Reike, N., Reil, G. H., Reinhard, U., Riebeling, V., Ritzmann, M., Rödder, J., Roth, E., Rüdelstein, R., Saborowski, F., Sauter, B., Sceffler, N., Schartl, A., Schifferdecker, E., Schlotterbeck, K. P., Schmidt, J., Schmidt-Dannert, D. R., Schmidt-Klewitz, H., Schmitz, H. J., Schnebelt, T., Schneider, H. L., Schneider, F. J., Schoeller, R., Scholz, D., Schoppe, W. D., Schreiner, G., Schroeder, J., Schuh, N., Schulte, K. L., Schulze, H., Schulze, H. D., Schuster, P., Schuster, H. P., Schweizer, P., Sechtem, U., Sedlmaier, H. P., Segel, S., Sehnert, W., Seidel, F., Siedentopf, K., Simon, H., Sodomann, C. P., Solbach, C., Sorges, E., Stabenow, S., Stadler, K. P., Stammwitz, E., Stein, U., Sternberg, H., Stiepak, C., Stockmann, M., Straus, W., Striegel, H., Struch, E., Strupp, G., Taubert, T. B. T., Thoeming, B., Thoß, A., Tinnappel, J., Tomsik, H., Topp, H., Troost, S., Öberreiter, A., Uebis, R., Ungler, T., Urbaszek, W., Vöhringer, H. F., von Arnim, T., von Leitner, E. R., von Löwis of Menar, A., von Mengden, H. J., von Smekal, P., Voss, W., Wacker, P., Warning, A., Warzecha, A., Wefers, U., Wehr, M., Weigel, H., Weissthanner, F., Weller, P., Werner, M., Wette, A., Wichert, H., Wielage, T., Wiese, U., Wilbrand, T. B., Wilhelms, E., Wilmsmann, G., Wolf, F. H., Wolf, T., Wonhas, F. C. M., Zastrow, B., Zeymer, U., Ziruler, S., Ziss, W., Zölch, K. A., Zwirner, K., Becker, D., Bosko, M., Csillag, I., Ermenyi, A., Fogas, J., Heltai, K., Jánosi, A., Katona, A., Kiraly, C., Kiss, B., Kutor, G., Mizik, R., Molnar, T., Mühl, M., Nagy, D., Palacti, I., Rudas, L., Sárosi, I., Simon, K., Sitkel, E., Sydó, T., Szaboki, F., Szikla, K., Szönyi, T., Timar, S., Vándor, L., Zamolyl, K., Walsh, M., Caspi, A., Swissa, M., Badano, L., Baldacci, G., Balli, E., Banda, D., Baretta, G., Boccalatte, A., Borgatti, M. L., Branzi, A., Burelli, C., Capelletti, D., Capucci, A., Caragiulo, D., Carbonieri, E., Cassin, M., Ceci, V., Cocchieri, M., Coletta, C., Conte, E., Contini, G. M., Corsini, G., D’Annunzio, E., De Blasi, M., De Luca, I., Delciterna, F., Di Pasquale, G., Diguardo, G., Fattore, L., Ferraiuulo, G., Finardi, A., Fioretti, P. M., Giunta, G., Guiducci, U., Guzzardi, G., Horando, G., Ignone, G., Lazzaroli, A., Levantesi, D., Liberati, R., Losi, E., Macor, F., Mangiameli, S., Martines, C., Meinardi, F., Morgera, T., Morozzi, L., Mostacci, M., Naccarella, F. F., Ottani, F., Palamara, A., Pani, A., Paperini, L., Pes, R., Pesola, A., Porzio, A., Raviele, A., Ricci, S., Rosi, A., Rossi, R., Rotiroti, D., Rusconi, L., Sabino, G., Saccone, V., Sanna, A., Scaramuzzino, G., Scorcu, G. P., Semprini, F., Severini, D., Staniscia, D., Tantalo, L., Tartagni, F., Terrosu, P., Tondelli, S., Trichero, R., Uslenghi, E., Vajola, S. F., Vetrano, A., Violi, E., Zardini, P., Zingarini, G. L., Zobbi, G., Zuin, G., Kalnins, U., Cârvekülg, A., Laanoca, J., Iacis, J., Lankiene, L., Laucevicius, A., Lukoseviciute, A., Palsauskaite, R., Petrauskiene, B., Soopóld, W., Uuetoa, H., Vilks, J., Vitonyte, R., Zakke, I., Dorantes, J., Hernández, H., Jerjes, C., Leva Garza, J. L., Martinez, C., Anneveldt, A., Baars, H. F., Baldew, S. C., Bendermacher, P. E. F., Boersma, L. V. A., Bos, R. J., Breedveld, R. W., Bruggink, P. W. F., Ciampricotti, R., Darmanata, J. I., de Porto, A. E., de Weerd, G. J., Deckers, J. W., Freericks, M. P., Hillebrand, F. A., Kerker, J. P., Koenen, J. C., Kofflard, M. G. M., Liem, K. L., Liem, A. H., Linssen, G. C. M., Lionarons, R. J., Peters, J. R. M., Posma, J. P., Saat, E. W. M., Savalle, L. H., Smits, W. C. G., Suttorp, M. J., Tans, A. C., Troquay, R. P. Th., van Beek, G. J., van Boven, A. J., Van der Heijden, R., Van Hessen, A., van Langeveld, R. A. M., van Lier, T. A. R., van Loo, L. W. H., van Wijngaarden, J., van Ziejl, L. G. P. M., Veerhoek, M. J., Vermer, F., Werner, H. A., Graven, T., Klykken, B., Meyerdieks, O., Omland, T. M., Otterstad, J. E., Pedersen, T., Rød, R., Banaszewski, M., Bednarkiewicz, Z., Bojarski, G., Ceremuzyñski, L., Czestochowska, E., Gajewski, M., Galewicz, M., Gorski, J., Grabczewska, Z. S., Gruchaka, M., Janicki, K., Janion, M., Jaworska, K., Jezewska, M., Kakol, J., Kizciuk, M., Kleinrok, A., Kolodziej, P., Komorowski, P., Konopka, A., Kopaczewski, J., Korecki, J., Kornacewicz-Jach, Z., Kowalewski, M., Kratochwil, D., Krolczyk, J., Krzminska-Pakula, M., Kurek, P., Kurowski, M., Kurpesa, M., Kurzawski, J., Kwiecien, R., Lenartowski, L., Lewandowski, M., Loboz-Grudzieñ, K., Luczak, G., Maliñski, A., Michalski, M., Musial, W., Nartowicz, E., Nowicka, A., Odyniec, A., Pasyk, S., Prastowski, W., Przybylski, A., Raczynska, A., Rodzik, J., Romanowski, M., Rynkiewicz, A., Rzyman, M., Sidorowicz, A., Sledziona, M., Sobiczewski, W., Sobkowicz, B., Sobolewska, J., Sokalski, L., Stepinska, J., Sterlinski, M., Stopinski, M., Świątecka, G., Szpernal, Z., Tarnowska, H., Trzos, E., Ujda, M., Wierzchowiecki, M., Wodynska, T., Wojciechowski, D., Wrabec, K., Wrzesinski, K., Zuk, P., Albuquergue, A., Costa, A., Cunha, D., Ferreira, D., Ferreira, R., Gaog Leiria, J. M., Pimenta, A., Rufino, E., Vasconcelos, J., Aldica, M., Balanescu, S., Bruckner, I. V., Capalneanu, R., Florescu, N., Georgescu, C. S., Cherasim, L., Ginshina, C., Merenta, A., Parvu, O., Radutiu, S., Savulescu, I., Vita, I., Averkov, O., Bokarev, I. N., Gratsiansky, N., Grigoriev, Y., Gruzdev, A., Kakhnovsky, I., Kheevehuk, T. V., Khrustalev, O., Kobalava, Y., Konoratieva, T. B., Koukline, Vladimir, Martiouchov, S., Pavlikova, E., Poskotinov, I., Rogalev, K., Sinopainikov, A., Syrkin, A., Tereschenko, S. T., Yavelov, I., Zavolghin, S., Čurilla, E., Kohn, R., Kovář, F., Murín, J., Poliačik, P., Drinovec, I., Horvat, M., Krivec, B., Markež, J., Pareznik, R., Pehnec, Z., Resman, J., Sifrer, F., Skale, R., Trinkaus, D., Voga, G., Baig, M. M. E., Blomerus, P., Botha, B. P., Burgess, L., Duncan, D., Duncan, D. I., Gillmer, D., Govender, N., Jardine, R. J., Kok, A., Manga, P., Naidu, R. K., Rajput, M. C., Ranjith, N., Roos, J. S., Snyders, F. A., Steingo, L., Stern, A., Tayob, F. Z., Vythilingum, S., Alonso-Orcajo, N., Arribas Jimenez, A., Ayestaran, J. I., Balsera, B. B. G., Barras, C., Castro, A., Cobo, N., Duque, A., Garcia, M. J., Goiriena, P., Gonzalez-Valdayo, M., Gulias Lopez, J. M., Jimenez Gomez, P., Lopez Garanda, V., Martín Santos, F., Nogueira, R., Pabon Osuna, P., Ponce De Leon, E., Quesada Dorador, A., Paya Serrano, R., Rodriguez, L., Rodriguez, M., Rubio, F., Ruiz-Salmeron, R., Solar, J., Toquero, J., Velasco, J., Vilar Herrero, V., Vizcaino, M., Wancisidor, X., Basilier, E., Birgersdotter, V., Björnsdotter, E., Bjurman, A., Hagström, D., Hallin, I., Hansen, O., Hemmingson, L. O., Lundkvist, L., Lycksell, M., Möller, B., Nolgard, P., Sjölund, G., Stjerna, A., Angehrn, W., de Benedetti, E., Diethelm, M., Gallino, A., Plebani, G., Vögelin, H. P., Wojtyna, W., Akgöz, H., Akgün, G., Akyürek, O., Batur, M. K., Bayata, S., Deger, N., Emel, O., Gürgün, C., Korkmaz, M. E., Kozan, O., Kumbasar, D., Muderrisoglu, H., Nisanci, Y., Ozin, B., Ozsaruhan, O., Payzin, S., Postaci, N., Sozcuer, H., Tamci, B., Topuzoglu, F., Türkoglu, C., Tutar, E., Ulucam, M., Ulusoy, T., Umman, B., Yalçinkaya, S., Yesil, M., Zoghi, M., Adams, P. C., Ahir, S., Ahsan, A. J., Akhtar, J., Albers, C. J., Al-Khafaji, M. N., Anderson, N., Bailey, R. J., Bain, R. J. I., Basu, A., Beal, A., Boyle, R. M., Brown, N., Campbell, S., Card, D., Cross, S. J., Davies, P., Davis, E. T. L., Dean, J. W., Deaner, A., Devine, M. A., Dhawan, J., Doig, J. C., Dubrey, S., Dunn, P. G., Dwight, J., Ecob, R., Fitzpatrick, H., Fletcher, S., Francis, C. M., Gershlick, A. H., Glennon, P. E., Goodfield, N. E., Grabau, W. J., Gray, M., Gray, K. E., Heath, J., Hendry, W. G., Highland, J., Hogg, K., Irving, J. B., James, M. A., Jennings, K., Joy, M., Kadr, H. H., Kahn, S., Keeling, P. J., Keir, P. M., Kemp, T. M., Kinaird, J., Kinsey, C., Knowles, K., Kooner, J. S., Lahiri, A., Lawson, C., Lewis, R., Macdermott, A. F. N., Mackay, A., Macleod, D. C., Mccance, A. J., Morrison, A., Mortimer, M., Mulvey, D., Murphy, J. J., Murray, S., Muthusamy, R., Myers, A., Nicolson, V. G., Northridge, D., Odemuyiwa, S., Oldroyd, K. G., Oliver, R. M., Pell, A. C. H., Pohl, J. E. F., Price, B., Quereshi, N., Rae, A. P., Reader, S., Reid, D. S., Reynolds, G. W., Robinson, A., Robson, R. H., Rodger, J. C., Rodrigues, E., Rose, E. L., Rowlands, D. B., Rowley, J. M., Rozkovec, A., Shreeve, J., Siklos, P., Smith, R. H., Sneddon, J. F., Somasundram, U., Squire, I., Stephens, J. D., Stephens-Lloyd, A., Strand, J. M., Stuart, J., Sutaria, N., Swan, J., Tait, G. W., Thomas, R. D., Thompson, M. A., Tildesley, G., Travill, C. M., Treadgold, J. A., Trelawney, J. M. S., Turner, D., Vallance, B. D., Wallbridge, D., Weissberg, P. L., White, E., Wicks, M., Wilcox, R. G., Wilkinson, P., Wiltshire, J. E., Wright, A., Andrea, B., Attassi, K., Bahr, R., Banas, J., Baran, K., Belknap, M., Bensman, M., Bertolet, B., Besley, D., Bethala, V., Betzu, R., Bhalla, R., Bhargava, M., Binder, A., Birkhead, R., Bodine, K., Brewer, D., Carey, S., Chengot, M., Coppola, J., Cragg, D., D’Arcy, B., Denny, D. M., Dilorenzo, P., Dixon, E., Doorey, A., Doty, D., Doty, W., Drossner, M., Eisenberg, P., Falco, T., Feldman, R., Freman, I., Frey, M., Garcia, J., Glassman, J., Goldman, S., Gomez, M., Gonzalez, M., Goodfield, P., Gottlieb, S., Grech, D., Hack, T., Haffey, T., Hanson, J., Havranek, E., Hermany, P., Hernandez, H., Herron, R., Hession, W., Hines, J., Hundley, R., Jacobs, W. C., Jerjes-Sanchez, C., Jerome, S., Josephson, R., Kalan, J., Kawalsky, D., Khan, A., Kmetzo, K., Kraemer, M., Lader, E., Landis, J., Lash, J., Leber, R., Leimbach, W., Leiva Garza, J. -L., Maddox, W., Magorien, R., Mahapatra, S., Mantecon, I., Mendelson, R., Miklin, J., Milas, J., Miller, R., Molk, B., Monrad, E. S., Morrison, J., Morse, H., Neustel, M., Nichols, D., Niederman, A., Nygaard, T., O’Connor, R., O’Riordan, W., Obermueller, S., Palmeri, S., Patel, R., Paul, T., Phiambolis, T., Piana, R., Polansky, B., Polinski, W., Ponce, G., Ribeiro, P., Roccario, E., Rogers, C. P., Rogers, W., Rosenblatt, A., Runyon, J. P., Scheel, F., Schmidt, P., Schneider, R., Schwartz, H., Shelhamer, L., Sheridan, F., Shine, W., Shook, T., Siskind, S., Slama, R., Spear, E., Stouffer, G., Strunk, B., Thadani, U., Timmis, G., Trautloff, R., Tse, A., Wohl, B., Zarren, H., Zucker, R., Kuster, F., and Pardie, J. P.

Subjects
Male, Risk, Infusions, medicine.medical_treatment, Myocardial Infarction, Bolus lytic therapy, Acute myocardial infarction, Tissue plasminogen activator, Thrombolytic drug, Double-Blind Method, Fibrinolytic Agents, medicine, Humans, Thrombolytic Therapy, Myocardial infarction, Infusions, Intravenous, Stroke, Aged, business.industry, ST elevation, Lanoteplase, Emergency department, Middle Aged, medicine.disease, Survival Analysis, Regimen, Relative risk, Anesthesia, Tissue Plasminogen Activator, Female, Intracranial Hemorrhages, Cardiology and Cardiovascular Medicine, business, Intravenous, medicine.drug
Abstract

AIMS To compare the efficacy and safety of lanoteplase, a single-bolus thrombolytic drug derived from alteplase tissue plasminogen activator, with the established accelerated alteplase regimen in patients presenting within 6 h of onset of ST elevation acute myocardial infarction. METHODS AND RESULTS 15,078 patients were recruited from 855 hospitals worldwide and randomized in a 2:1 ratio to receive either lanoteplase 120 KU. kg(-1)as a single intravenous bolus, or up to 100 mg accelerated alteplase given over 90 min. The primary end-point was all-cause mortality at 30 days and the hypothesis was that the two treatments would be equivalent. By 30 days, 6.61% of alteplase-treated patients and 6.75% lanoteplase-treated patients had died (relative risk 1.02). Total stroke occurred in 1.53% alteplase- and 1.87% lanoteplase-treated patients (ns); haemorrhagic stroke rates were 0.64% alteplase and 1.12% lanoteplase (P=0.004). The net clinical deficit of 30-day death or non-fatal disabling stroke was 7.0% and 7.2%, respectively. By 6 months, 8.8% of alteplase-treated patients and 8.7% of lanoteplase-treated patients had died. CONCLUSION Single-bolus weight-adjusted lanoteplase is an effective thrombolytic agent, equivalent to alteplase in terms of its impact on survival and with a comparable risk-benefit profile. The single-bolus regimen should shorten symptoms to treatment times and be especially convenient for emergency department or out-of-hospital administration.

Published
2000

25. The Stroke Outcomes and Neuroimaging of Intracranial Atherosclerosis (SONIA) Trial

Author

Feldmann, E, Wilterdink, J L., Kosinski, A, Lynn, M, Chimowitz, M I., Sarafin, J, Smith, H H., Nichols, F, Rogg, J, Cloft, H J., Wechsler, L, Saver, J, Levine, S R., Tegeler, C, Adams, R, and Sloan, M

Abstract

Transcranial Doppler ultrasound (TCD) and magnetic resonance angiography (MRA) can identify intracranial atherosclerosis but have not been rigorously validated against the gold standard, catheter angiography. The WASID trial (Warfarin Aspirin Symptomatic Intracranial Disease) required performance of angiography to verify the presence of intracranial stenosis, allowing for prospective evaluation of TCD and MRA. The aims of Stroke Outcomes and Neuroimaging of Intracranial Atherosclerosis (SONIA) trial were to define abnormalities on TCD/MRA to see how well they identify 50 to 99% intracranial stenosis of large proximal arteries on catheter angiography.

Published
2007
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27. An open-label trial of combination therapy with interferon -1a and oral methotrexate in MS

Author

Calabresi, P. A., Wilterdink, J. L., Rogg, J. M., Mills, P., Webb, A., and Whartenby, K. A.

Abstract

An open-label study was performed to evaluate the safety and efficacy of combination therapy with weekly oral methotrexate (20 mg) and interferon -1a (IFN-1a) in 15 patients with MS who had experienced exacerbations while receiving IFN monotherapy. Nausea was the only major side effect. A 44 reduction in the number of gadolinium-enhanced lesions seen on MRI scan was observed during combination therapy (p0.02). There was a trend toward fewer exacerbations. This combination therapy appears to be safe and well tolerated, and should be studied in a controlled trial.

Published
2002

33. Survey-based Evaluation of Resident and Attending Financial Literacy.

Author

Huebinger RM, Hussain R, Tupchong K, Walia S, Fairbrother H, and Rogg J

Subjects
Cross-Sectional Studies, Humans, Literacy, Surveys and Questionnaires, Emergency Medicine education, Internship and Residency
Abstract

Introduction: Physician finances are linked to wellness and burnout. However, few physicians receive financial management education. We sought to determine the financial literacy and educational need of attending and resident physician at an academic emergency medicine (EM) residency., Methods: We performed a cross-sectional, survey study at an academic EM residency. We devised a 49-question survey with four major domains: demographics (16 questions); Likert-scale questions evaluating value placed on personal finances (3 questions); Likert-scale questions evaluating perceived financial literacy (11 questions); and a financial literacy test based on previously developed and widely used financial literacy questions (19 questions). We administered the survey to EM attendings and residents. We analyzed the data using descriptive statistics and compared attending and resident test question responses., Results: A total of 44 residents and 24 attendings responded to the survey. Few (9.0% of residents, 12.5% of attendings) reported prior formal financial education. However, most respondents (70.5% of residents and 79.2% of attendings) participated in financial self-learning. On a five-point Likert scale (not at all important: very important), respondents felt that financial independence (4.7 ± 0.8) and their finances (4.7±0.8) were important for their well-being. Additionally, they valued being prepared for retirement (4.7±0.9). Regarding perceived financial literacy (very uncomfortable: very comfortable), respondents had the lowest comfort level with investing in the stock market (2.7±1.5), applying for a mortgage (2.8±1.6), and managing their retirement (3.0±1.4). Residents scored significantly lower than attendings on the financial literacy test (70.8% vs 79.6%, P<0.01), and residents scored lower on questions pertaining to investment (78.8% v 88.9%, P<0.01) and insurance and taxes (47.0% v 70.8%, P<0.01). Overall, respondents scored lower on questions about retirement (58.8%, P<0.01) and insurance and taxes (54.7%, P<0.01)., Conclusion: Emergency physicians' value of financial literacy exceeded confidence in financial literacy, and residents reported poorer confidence than attendings. We identified deficiencies in emergency physicians' financial literacy for retirement, insurance, and taxes.

Published
2021
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34. Posterior reversible encephalopathy syndrome (PRES): Another imaging manifestation of COVID-19.

Author

Rogg J, Baker A, and Tung G

Abstract

Neuroimaging manifestations of COVID-19 are being reported with increasing frequency with recent reports of associated atypical leukoencephalopathies. We add to this literature by describing a COVID-19 + patient who demonstrated imaging findings typical for posterior reversible encephalopathy syndrome (PRES). The inflammatory syndrome associated with novel corona virus infection has shown markedly increased levels of cytokines and inflammatory markers. This has also been described in a proposed mechanism for PRES, where elevated inflammatory markers result in endothelial injury causing interstitial fluid extravasation typical of PRES. We expect that other cases of PRES will be observed in this population given the scope of the Covid-19 pandemic., Competing Interests: The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (© 2020 The Author(s).)

Published
2020
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35. Key Elements of Clinical Magnetic Resonance Imaging Safety: It Takes a Village.

Author

Rogg J

Subjects
Humans, Magnetic Resonance Imaging adverse effects, Practice Guidelines as Topic, Magnetic Resonance Imaging methods, Patient Safety
Abstract

Magnetic resonance (MR) imaging-related injuries have continued to occur at an alarming rate during more than 3 decades of use. Persistently reported MR imaging-related injuries are caused by (1) radiofrequency thermal effect burns, (2) bruising from table top and coil-related mechanical injuries, (3) magnetic field-related support equipment malfunction, (4) magnetic field-related projectile trauma, (5) gradient switching noise hearing loss. A cohesive and educated MR imaging community under the guidance of a defined management structure is essential for monitoring and mitigating MR imaging risks. This article offers an approach for decreasing MR imaging-related injury risks., Competing Interests: Disclosure The author has no commercial or financial conflicts of interest or significant funding sources relevant to this submission., (Copyright © 2020 Elsevier Inc. All rights reserved.)

Published
2020
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37. Impact of Hurricane Harvey on Healthcare Utilization and Emergency Department Operations.

Author

Chambers KA, Husain I, Chathampally Y, Vierling A, Cardenas-Turanzas M, Cardenas F, Sharma K, Prater S, and Rogg J

Subjects
Change Management, Health Services Accessibility organization & administration, Hospitalization statistics & numerical data, Humans, Quality Improvement, Retrospective Studies, Texas epidemiology, Civil Defense methods, Civil Defense organization & administration, Civil Defense standards, Cyclonic Storms statistics & numerical data, Emergency Service, Hospital organization & administration, Emergency Service, Hospital trends, Patient Acceptance of Health Care statistics & numerical data
Abstract

Introduction: Hurricanes have increased in severity over the past 35 years, and climate change has led to an increased frequency of catastrophic flooding. The impact of floods on emergency department (ED) operations and patient health has not been well studied. We sought to detail challenges and lessons learned from the severe weather event caused by Hurricane Harvey in Houston, Texas, in August 2017., Methods: This report combines narrative data from interviews with retrospective data on patient volumes, mode of arrival, and ED lengths of stay (LOS). We compared the five-week peri-storm period for the 2017 hurricane to similar periods in 2015 and 2016., Results: For five days, flooding limited access to the hospital, with a consequent negative impact on provider staffing availability, disposition and transfer processes, and resource consumption. Interruption of patient transfer capabilities threatened patient safety, but flexibility of operations prevented poor outcomes. The total ED patient census for the study period decreased in 2017 (7062 patients) compared to 2015 (7665 patients) and 2016 (7770) patients). Over the five-week study period, the arrival-by-ambulance rate was 12.45% in 2017 compared to 10.1% in 2016 (p < 0.0001) and 13.7% in 2015 (p < 0.0001). The median ED length of stay (LOS) in minutes for admitted patients was 976 minutes in 2015 (p < 0.0001) compared to 723 minutes in 2016 and 591 in 2017 (p < 0.0001). For discharged patients, median ED LOS was 336 minutes in 2016 compared to 356 in 2015 (p < 0.0001) and 261 in 2017 (p < 0.0001). Median boarding time for admitted ED patients was 284 minutes in 2016 compared to 470 in 2015 (p < 0.0001) and 234.5 in 2017 (p < 0.001). Water damage resulted in a loss of 133 of 179 inpatient beds (74%). Rapid and dynamic ED process changes were made to share ED beds with admitted patients and to maximize transfers post-flooding to decrease ED boarding times., Conclusion: A number of pre-storm preparations could have allowed for smoother and safer ride-out functioning for both hospital personnel and patients. These measures include surplus provisioning of staff and supplies to account for limited facility access. During a disaster, innovative flexibility of both ED and hospital operations may be critical when disposition and transfer capibilities or bedding capacity are compromised.

Published
2020
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38. Prospective study of myelin water fraction changes after mild traumatic brain injury in collegiate contact sports.

Author

Spader HS, Dean DC, LaFrance WC, Raukar NP, Cosgrove GR, Eyerly-Webb SA, Ellermeier A, Correia S, Deoni SCL, and Rogg J

Abstract

Objective: Mild traumatic brain injury (mTBI) in athletes, including concussion, is increasingly being found to have long-term sequelae. Current imaging techniques have not been able to identify early damage caused by mTBI that is predictive of long-term symptoms or chronic traumatic encephalopathy. In this preliminary feasibility study, the authors investigated the use of an emerging magnetic resonance imaging (MRI) technique, multicomponent driven equilibrium single pulse observation of T1 and T2 (mcDESPOT), in visualizing acute and chronic white matter changes after mTBI in collegiate football and rugby players., Methods: This study was a nonrandomized, nonblinded prospective trial designed to quantify changes in the myelin water fraction (MWF), used as a surrogate MRI measure of myelin content, in a group of male collegiate football and rugby players, classified here as a contact sport player (CSP) cohort, at the time of mTBI diagnosis and 3 months after injury when the acute symptoms of the injury had resolved. In addition, differences in the MWF between the CSP cohort and a control cohort of noncontact sport players (NCSPs) were quantified. T-tests and a threshold-free cluster enhancement (TFCE) statistical analysis technique were used to identify brain structures with significant changes in the MWF between the CSP and NCSP cohorts and between immediately postinjury and follow-up images obtained in the CSP cohort., Results: Brain MR images of 12 right-handed male CSPs were analyzed and compared with brain images of 10 right-handed male NCSPs from the same institution. A comparison of CSP and NCSP baseline images using TFCE showed significantly higher MWFs in the bilateral basal ganglia, anterior and posterior corpora callosa, left corticospinal tract, and left anterior and superior temporal lobe (p < 0.05). At the 3-month follow-up examination, images from the CSP cohort still showed significantly higher MWFs than those identified on baseline images from the NCSP cohort in the bilateral basal ganglia, anterior and posterior corpora callosa, and left anterior temporal lobe, and also in the bilateral corticospinal tracts, parahippocampal gyrus, and bilateral juxtapositional (previously known as supplemental motor) areas (p < 0.05). In the CSP cohort, a t-test comparing the MWF at the time of injury and 3 months later showed a significant increase in the overall MWF at follow-up (p < 0.005). These increases were greatest in the bilateral basal ganglia and deep white matter. MWF decreases were seen in more superficial white matter (p < 0.005)., Conclusions: In this preliminary study, MWF was found to be increased in the brains of CSPs compared with the brains of controls, suggesting acute/chronic MWF alterations in CSPs from previous injuries. Increases in the MWF were also demonstrated in the brains of CSPs 3 months after the players sustained an mTBI. The full clinical significance of an increased MWF and whether this reflects axon neuropathology or disorderly remyelination leading to hypermyelination has yet to be determined.

Published
2018
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39. The Brown University Traumatic Brain Injury Research Consortium and the Norman Prince Neurosciences Institute.

Author

Rogg J, Spader H, Wilcox BJ, Ellermeier A, Correira S, Chodobski A, Szmydynger-Chodobska J, Raukar N, Machan JT, Crisco JJ, and LaFrance WC Jr

Subjects
Academies and Institutes, Humans, Neurosciences, Research, Brain Injuries, Universities
Abstract

This article provides an overview of the Brown University Traumatic Brain Injury Research Consortium (TBIRC) and summarizes the multidisciplinary basic and clinical neuroscience work being conducted by investigators at Brown University and the affiliate hospitals in association with the Norman Prince Neurosciences Institute (NPNI).

Published
2014

40. Evaluation of renal function tests by age and sex to determine emergency department patients' eligibility for cardiac computed tomography.

Author

Rogg J, Hoffmann U, Truong Q, Brown DF, Parry B, and Nagurney JT

Subjects
Adult, Age Factors, Aged, Aged, 80 and over, Creatinine blood, Female, Glomerular Filtration Rate, Humans, Male, Middle Aged, Myocardial Infarction diagnosis, Patient Selection, Prospective Studies, Sex Factors, Young Adult, Acute Coronary Syndrome diagnosis, Chest Pain diagnosis, Coronary Angiography, Diagnostic Tests, Routine standards, Emergency Service, Hospital, Tomography, X-Ray Computed
Abstract

Background: Coronary computed tomography angiography (CCTA) can be used for low-risk chest pain patients, but presents a risk of contrast-induced nephropathy., Objective: We compared, by age and sex, the percent of patients who would become ineligible for CCTA based on serum creatinine (SCr) and glomerular filtration rate (GFR) cutoff points., Methods: All adult patients who presented to the Emergency Department (ED) with chest pain were screened using their first ED SCr as part of the ROMICAT (Rule Out Myocardial Infarction Using Computer Assisted Tomography) study. This was a secondary analysis of the screening logs of that study. The Modification of Diet in Renal Disease formula was applied to calculate estimated GFR and the percent of patients, by age and sex, meeting commonly applied exclusion criteria using selected SCr and GFR cutoff values. This was our primary outcome., Results: Of 2398 patients screened, 384 (16%) were excluded for high-risk features or technical limitations of CCTA, leaving 2014 patients who were studied; 56% were male. For all cutoff points of SCr (≥1.3 mg/dL, ≥1.5 mg/dL, ≥1.8 mg/dL), the percent of males excluded significantly exceeded that of females (p < 0.0001 [28.6% males to 18.5% females]; p < 0.0001 [17.4% males to 11.2% females]; p = 0.0004 [10.1% males to 5.8% females], respectively). Conversely, for two of the three cutoff points of GFR (≤60 mL/min/1.73 m(2) and ≤45 mL/min/1.73 m(2)), the percent of females excluded significantly exceeded that of males (p < 0.0001 [33.6% females to 25.4% males] and p = 0.0015 [17.6% males to 12.5% females], respectively)., Conclusions: The choice of SCr or GFR to screen patients for CCTA selectively excludes either males or females, respectively. Therefore, individual physicians and institutions must understand the impact of both renal function tests and cutoff points when identifying patients who may be eligible for CCTA., (Copyright © 2013 Elsevier Inc. All rights reserved.)

Published
2013
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41. Invisible metallic microfiber in clothing presents unrecognized MRI risk for cutaneous burn.

Author

Pietryga JA, Fonder MA, Rogg JM, North DL, and Bercovitch LG

Subjects
Burns, Electric prevention & control, Child, Female, Humans, Burns, Electric diagnosis, Burns, Electric etiology, Clothing, Magnetic Resonance Imaging adverse effects, Skin injuries, Skin radiation effects, Textiles radiation effects
Abstract

Summary: We report a case of a thermal burn that occurred during MR imaging likely caused by invisible silver-embedded microfibers in the fabric of an undershirt. As the prevalence of fabric containing nondetectable metallic microfiber increases in athletic and "tech" clothing, the importance of having patients change into safe facility-provided garments before MR imaging is emphasized.

Published
2013
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42. Clinical stroke penumbra: use of National Institutes of Health stroke scale as a surrogate for CT perfusion in patient triage for intra-arterial middle cerebral artery stroke therapy.

Author

Boxerman JL, Jayaraman MV, Mehan WA, Rogg JM, and Haas RA

Subjects
Adult, Aged, Aged, 80 and over, Female, Humans, Male, Middle Aged, National Institutes of Health (U.S.), Reproducibility of Results, Sensitivity and Specificity, Severity of Illness Index, Treatment Outcome, Triage, United States, Cerebral Angiography methods, Infarction, Middle Cerebral Artery diagnostic imaging, Infarction, Middle Cerebral Artery therapy, Perfusion Imaging methods, Stroke diagnostic imaging, Stroke therapy, Thrombolytic Therapy methods
Abstract

Background and Purpose: CTP may help triage acute stroke patients for IAT, but requires additional contrast agent, radiation, and imaging time. Our aim was to determine whether clinical examination (NIHSS) with NCCT and CTA can substitute for CTP without significantly affecting IAT triage of patients with acute MCA stroke., Materials and Methods: We reviewed NCCT, CTA, and CTP imaging performed within 8 hours of symptom onset in 36 patients presenting with MCA territory stroke (September 2007-October 2009). Two neuroradiologists reviewed, independently and by consensus, NCCT, CTA, and CTP (CTP group), and 2 different neuroradiologists blinded to CTP reviewed NCCT, CTA, and NIHSS (stroke scale group) to determine IAT eligibility: M1 or proximal M2 occlusion; infarct core <1/3 MCA territory; and ischemic penumbra >20% infarct core. The stroke scale group estimated infarct core from NCCT and CTA source images and ischemic penumbra from core size relative to NIHSS score and re-evaluated patients after unblinding to CTP. We computed intragroup and intergroup κ scores for IAT treatment recommendation and used the McNemar test to determine whether CTP significantly affected the stroke scale group's decisions., Results: IAT was recommended in 16/36 (44%) and 17/36 (47%) patients by the CTP and stroke scale groups, respectively, with intragroup κ scores of 0.78 ± 0.11 versus 0.83 ± 0.09. The intergroup κ score was 0.83 ± 0.09. When unblinded to CTP, the stroke scale group revised 2/36 (5.6%) decisions, which was insignificant (P = .48, McNemar test)., Conclusions: NIHSS interpreted with NCCT and CTA may be an effective substitute for CTP-derived measures in the IAT triage of patients with acute MCA stroke. Replacing CTP may potentially reduce radiation and contrast dose and time to treatment.

Published
2012
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43. Incidence of extrinsic compression of the internal jugular vein in unselected patients undergoing CT angiography.

Author

Jayaraman MV, Boxerman JL, Davis LM, Haas RA, and Rogg JM

Subjects
Adult, Aged, Constriction, Pathologic diagnostic imaging, Female, Humans, Incidence, Male, Middle Aged, Retrospective Studies, Rhode Island epidemiology, Young Adult, Jugular Veins diagnostic imaging, Peripheral Vascular Diseases diagnostic imaging, Peripheral Vascular Diseases epidemiology, Phlebography statistics & numerical data, Tomography, X-Ray Computed statistics & numerical data
Abstract

Background and Purpose: Little is known about how commonly the internal jugular vein is compressed by extrinsic structures in the upper neck. The purpose of this paper was to identify the frequency and cause of external compression of the superior segment of the internal jugular vein., Materials and Methods: Retrospective review of CT angiograms of the neck was performed in 108 consecutive patients. Axial source images were evaluated for moderate (>50%) or severe (>80%) stenosis of the internal jugular vein on the basis of external compression. The cause of extrinsic compression was also recorded. In cases with stenosis, the presence of ipsilateral isoattenuated collateral veins was recorded and considered representative of collateral flow., Results: Moderate stenosis was seen in 33.3% of right and 25.9% of left internal jugular veins. Severe stenosis was seen in 24.1% of right and 18.5% of left internal jugular veins. The most common causes of extrinsic compression included the styloid process and the posterior belly of the digastric muscle. In patients with severe internal jugular vein stenosis, 53.8% of right sides and 55% of left sides had associated condylar collaterals., Conclusions: Extrinsic compression of the superior segment of the internal jugular vein is a common finding in unselected patients, often caused by the styloid process or the posterior belly of the digastric muscle. Presence of severe stenosis is not universally associated with collateral formation.

Published
2012
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44. Eastern equine encephalitis: MRI findings in two patients.

Author

Ethier M and Rogg J

Subjects
Diagnosis, Differential, Encephalomyelitis, Equine therapy, Fatal Outcome, Humans, Male, Tomography, X-Ray Computed, Young Adult, Encephalitis Virus, Eastern Equine, Encephalomyelitis, Equine diagnosis, Magnetic Resonance Imaging
Published
2012

45. Radiation necrosis of a high-grade glioma.

Author

Raghavan D, Boxerman J, Jeyapalan S, and Rogg J

Subjects
Antineoplastic Agents, Alkylating therapeutic use, Antineoplastic Agents, Phytogenic therapeutic use, Brain Neoplasms drug therapy, Dacarbazine analogs & derivatives, Dacarbazine therapeutic use, Glioma drug therapy, Humans, Male, Middle Aged, Necrosis, Paclitaxel analogs & derivatives, Paclitaxel therapeutic use, Polyglutamic Acid analogs & derivatives, Polyglutamic Acid therapeutic use, Temozolomide, Brain Neoplasms pathology, Glioma pathology, Magnetic Resonance Angiography
Published
2012

47. Is Rolandic epilepsy associated with abnormal findings on cranial MRI?

Author

Boxerman JL, Hawash K, Bali B, Clarke T, Rogg J, and Pal DK

Subjects
Case-Control Studies, Child, Child, Preschool, Electroencephalography, Epilepsy, Rolandic physiopathology, Female, Functional Laterality physiology, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Male, Observer Variation, Odds Ratio, Seizures physiopathology, Brain pathology, Epilepsy, Rolandic pathology
Abstract

Rolandic epilepsy (RE) is designated an idiopathic epilepsy syndrome, and hence no lesional abnormalities are expected on MRI exam. Recent reports suggest that MRI abnormalities are not only common, but may be specific for temporal lobe epilepsy, and lateralized to the side of EEG discharges. However, no controlled study has been performed to test the hypothesis of association between MRI abnormalities and Rolandic epilepsy. We performed an unmatched case-control study to test the hypothesis of association between MRI abnormalities and Rolandic epilepsy, using 25 typical RE cases and 25 children with migraine. Two independent examiners rated the MRIs for abnormalities. Examiners were blinded to the study hypothesis and identity of case and control exams. Fifty-two percent of RE exams contained at least one abnormality: peri/hippocampal abnormality (one case), non-localized congenital malformation (seven cases), subcortical parenchymal hyperintensities (two cases), periventricular parenchymal hyperintensities (one case), dilated perivascular spaces (six cases). There was no difference between the number or type of abnormalities in cases and controls. No type of abnormality lateralized to the hemisphere from which the EEG spikes emanated. The odds ratio of association between MRI abnormalities and RE was 0.87, 95% CI: 0.18-4.33 after adjusting for potential demographic and technical factors. We conclude that routine cranial MRI abnormalities are common in RE, but no more common than in controls, and not specific for RE.

Published
2007
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48. Optimization of the safety and efficacy of interferon beta 1b and azathioprine combination therapy in multiple sclerosis.

Author

Pulicken M, Bash CN, Costello K, Said A, Cuffari C, Wilterdink JL, Rogg JM, Mills P, and Calabresi PA

Subjects
Adjuvants, Immunologic adverse effects, Adult, Azathioprine adverse effects, Drug Therapy, Combination, Female, Humans, Immunosuppressive Agents adverse effects, Interferon beta-1b, Interferon-beta adverse effects, Male, Middle Aged, Pilot Projects, Treatment Outcome, Adjuvants, Immunologic administration & dosage, Azathioprine administration & dosage, Immunosuppressive Agents administration & dosage, Interferon-beta administration & dosage, Multiple Sclerosis drug therapy
Abstract

We conducted an open-label pilot clinical trial to evaluate the safety and efficacy of adding oral azathioprine to the treatment regimen of 15 multiple sclerosis patients breaking through monotherapy with interferon beta-1b. There were no serious adverse events. Gastrointestinal side effects and leukopenia were the most common adverse events and limited dose escalation. There was a 65% reduction in the number of gadolinium-enhanced magnetic resonance imaging (MRI) lesions on combination therapy compared to the baseline values (P =0.003). A total WBC count less than 4800/mm3 was the best predictor of MRI response.

Published
2005
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49. Targeting the cranial nerve: microradiosurgery for trigeminal neuralgia with CISS and 3D-flash MR imaging sequences.

Author

Zerris VA, Noren GC, Shucart WA, Rogg J, and Friehs GM

Subjects
Atrophy pathology, Atrophy surgery, Humans, Preoperative Care, Trigeminal Neuralgia cerebrospinal fluid, Trigeminal Neuralgia pathology, Imaging, Three-Dimensional, Magnetic Resonance Imaging, Microsurgery instrumentation, Radiosurgery instrumentation, Trigeminal Neuralgia surgery
Abstract

Object: The authors undertook a study to identify magnetic resonance (MR) imaging techniques that can be used reliably during gamma knife surgery (GKS) to identify the trigeminal nerve, surrounding vasculature, and areas of compression., Methods: Preoperative visualization of the trigeminal nerve and surrounding vasculature as well as targeting the area of vascular compression may increase the effectiveness of GKS for trigeminal neuralgia. During the past years our gamma knife centers have researched different MR imaging sequences with regard to their ability to visualize cranial nerves and vascular structures. Constructive interference in steady-state (CISS) fusion imaging with three-dimensional gradient echo sequences (3D-Flash) was found to be of greatest value in the authors' 25 most recent patients. In 24 (96%) out of the 25 patients, the fifth cranial nerve, surrounding vessels, and areas of compression could be reliably identified using CISS/3D-Flash. The MR images were acceptable despite patients' history of microvascular decompression, radiofrequency (RF) ablation, or concomitant disease. In one of 25 patients with a history of multiple RF lesions, the visualization was inadequate due to severe trigeminal nerve atrophy., Conclusions: The CISS/3D-Flash fusion imaging has become the preferred imaging method at the authors' institutions during GKS for trigeminal neuralgia. It affords the best visualization of the trigeminal nerve, surrounding vasculature, and the precise location of vascular compression.

Published
2005
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50. Pediatric intracranial aneurysm: a diagnostic dilemma solved with contrast-enhanced MR imaging.

Author

Sungarian A, Rogg J, and Duncan JA 3rd

Subjects
Angiography, Digital Subtraction, Cerebral Angiography, Cerebral Hemorrhage diagnosis, Contrast Media administration & dosage, Diagnosis, Differential, Follow-Up Studies, Frontal Lobe pathology, Humans, Hydrocephalus diagnosis, Infant, Male, Neurologic Examination, Vasospasm, Intracranial diagnosis, Image Enhancement, Intracranial Aneurysm diagnosis, Magnetic Resonance Imaging
Abstract

Childhood intracranial aneurysms are exceedingly uncommon. Diagnosis of intracranial aneurysms in infancy may be difficult because of their infrequency and confusing clinical presentation. Findings with routine radiographic methods may be misleading and difficult to interpret. We present a case of the rupture of an anterior communicating artery aneurysm in a 7-month-old child. The rupture had eluded diagnosis until contrast-enhanced MR imaging was performed.

Published
2003

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