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7. Prostate intrafraction translation margins for real-time monitoring and correction strategies.

Author

Litzenberg, Dale W, Balter, James M, Hadley, Scott W, Hamstra, Daniel A, Willoughby, Twyla R, Kupelian, Patrick A, Djemil, Toufik, Mahadevan, Arul, Jani, Shirish, Weinstein, Geoffrey, Solberg, Timothy, Enke, Charles, Levine, Lisa, and Sandler, Howard M

Subjects
Oncology and Carcinogenesis
Abstract

The purpose of this work is to determine appropriate radiation therapy beam margins to account for intrafraction prostate translations for use with real-time electromagnetic position monitoring and correction strategies. Motion was measured continuously in 35 patients over 1157 fractions at 5 institutions. This data was studied using van Herk's formula of (αΣ + γσ') for situations ranging from no electromagnetic guidance to automated real-time corrections. Without electromagnetic guidance, margins of over 10 mm are necessary to ensure 95% dosimetric coverage while automated electromagnetic guidance allows the margins necessary for intrafraction translations to be reduced to submillimeter levels. Factors such as prostate deformation and rotation, which are not included in this analysis, will become the dominant concerns as margins are reduced. Continuous electromagnetic monitoring and automated correction have the potential to reduce prostate margins to 2-3 mm, while ensuring that a higher percentage of patients (99% versus 90%) receive a greater percentage (99% versus 95%) of the prescription dose.

Published
2012

8. Comparison of transabdominal ultrasound and electromagnetic transponders for prostate localization

Author

Foster, Ryan D, Solberg, Timothy D, Li, Haisen S, Kerkhoff, Andrew, Enke, Charles A, Willoughby, Twyla R, and Kupelian, Patrick A

Subjects
Medical and Biological Physics, Biomedical and Clinical Sciences, Clinical Sciences, Physical Sciences, Oncology and Carcinogenesis, Aging, Urologic Diseases, Biomedical Imaging, Cancer, Prostate Cancer, Abdomen, Electromagnetic Phenomena, Humans, Likelihood Functions, Male, Movement, Nebraska, Prostate, Prostatic Neoplasms, Prostheses and Implants, Radiography, Reproducibility of Results, Sensitivity and Specificity, Skin, Time Factors, Ultrasonography, localization, prostate, ultrasound, electromagnetic transponders, Other Physical Sciences, Medical Physiology, Nuclear Medicine & Medical Imaging, Medical physiology, Medical and biological physics
Abstract

The aim of this study is to compare two methodologies of prostate localization in a large cohort of patients. Daily prostate localization using B-mode ultrasound has been performed at the Nebraska Medical Center since 2000. More recently, a technology using electromagnetic transponders implanted within the prostate was introduced into our clinic (Calypso(R)). With each technology, patients were localized initially using skin marks. Localization error distributions were determined from offsets between the initial setup positions and those determined by ultrasound or Calypso. Ultrasound localization data was summarized from 16619 imaging sessions spanning 7 years; Calypso localization data consists of 1524 fractions in 41 prostate patients treated in the course of a clinical trial at five institutions and 640 localizations from the first 16 patients treated with our clinical system. Ultrasound and Calypso patients treated between March and September 2007 at the Nebraska Medical Center were analyzed and compared, allowing a single institutional comparison of the two technologies. In this group of patients, the isocenter determined by ultrasound-based localization is on average 5.3 mm posterior to that determined by Calypso, while the systematic and random errors and PTV margins calculated from the ultrasound localizations were 3 - 4 times smaller than those calculated from the Calypso localizations. Our study finds that there are systematic differences between Calypso and ultrasound for prostate localization.

Published
2010

14. A Nonhuman Primate Model of Human Radiation-Induced Venocclusive Liver Disease and Hepatocyte Injury

Author

Yannam, Govardhana Rao, Han, Bing, Setoyama, Kentaro, Yamamoto, Toshiyuki, Ito, Ryotaro, Brooks, Jenna M., Guzman-Lepe, Jorge, Galambos, Csaba, Fong, Jason V., Deutsch, Melvin, Quader, Mubina A., Yamanouchi, Kosho, Kabarriti, Rafi, Mehta, Keyur, Soto-Gutierrez, Alejandro, Roy-Chowdhury, Jayanta, Locker, Joseph, Abe, Michio, Enke, Charles A., Baranowska-Kortylewicz, Janina, Solberg, Timothy D., Guha, Chandan, and Fox, Ira J.

Published
2014
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25. Tolerable limits to whole liver irradiation in non-human primates: 1674

Author

Yannam, Govardhana R., Han, Bing, Setoyama, Kentaro, Yamamoto, Toshiyuki, Ito, Ryotaro, Brooks, Jenna M., Guzman-Lepe, Jorge, Galambos, Csaba, Fong, Jason V., Deutsch, Melvin, Quader, Mubina A., Yamanouchi, Kosho, Mehta, Keyur, Soto-Gutierrez, Alejandro, Roy-Chowdhury, Jayanta, Locker, Joseph, Abe, Michio, Enke, Charles A., Baranowska-Kortylewicz, Janina, Solberg, Timothy D., Guha, Chandan, and Fox, Ira J.

Published
2012

35. Prostate Cancer, Version 2.2019, NCCN Clinical Practice Guidelines in Oncology

Author

Mohler, James L., primary, Antonarakis, Emmanuel S., additional, Armstrong, Andrew J., additional, D’Amico, Anthony V., additional, Davis, Brian J., additional, Dorff, Tanya, additional, Eastham, James A., additional, Enke, Charles A., additional, Farrington, Thomas A., additional, Higano, Celestia S., additional, Horwitz, Eric Mark, additional, Hurwitz, Michael, additional, Ippolito, Joseph E., additional, Kane, Christopher J., additional, Kuettel, Michael R., additional, Lang, Joshua M., additional, McKenney, Jesse, additional, Netto, George, additional, Penson, David F., additional, Plimack, Elizabeth R., additional, Pow-Sang, Julio M., additional, Pugh, Thomas J., additional, Richey, Sylvia, additional, Roach, Mack, additional, Rosenfeld, Stan, additional, Schaeffer, Edward, additional, Shabsigh, Ahmad, additional, Small, Eric J., additional, Spratt, Daniel E., additional, Srinivas, Sandy, additional, Tward, Jonathan, additional, Shead, Dorothy A., additional, and Freedman-Cass, Deborah A., additional

Published
2019
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50. Radiation for diffuse large B-cell lymphoma: more questions than answers

Author

Bierman, Philip J. and Enke, Charles A.

Subjects
Lymphomas -- Care and treatment -- Diagnosis -- Research, PET imaging -- Usage, Radiotherapy -- Health aspects, Health
Abstract

Dr. Kelsey and colleagues have done an admirable job in their review of radiation therapy for patients with diffuse large B-cell lymphoma (DLBCL). There are certain situations in which the [...]

Published
2010

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