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244 results on '"Vieillevigne, L."'

1. Stereotactic body radiation therapy for spine and non-spine bone metastases. GETUG (french society of urological radiation oncologists) recommendations using a national two-round modified Delphi survey

Author

Vilotte, F., Pasquier, D., Blanchard, P., Supiot, S., Khalifa, J., Schick, U., Lacornerie, T., Vieillevigne, L., Marre, D., Chapet, O., Latorzeff, I., Magne, N., Meyer, E., Cao, K., Belkacemi, Y., Bibault, J.E., Berge-Lefranc, M., Faivre, J.C., Gnep, K., Guimas, V., Hasbini, A., Lagrand-Escure, J., Hennequin, C., and Graff, P.

Published
2022
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7. PD-0577 Final analysis of the benchmark case RTQA procedure for the EORTC 1420 ‘Best of’ trial (NCT02984410)

Author

Portik, D., primary, Clementel, E., additional, Corning, C., additional, Olaniran, R.O., additional, Kazmierska, J., additional, Ozsahin, E.M., additional, Grant, W., additional, Tomsej, M., additional, Vieillevigne, L., additional, Simon, C., additional, Gregoire, V., additional, Reynaert, N., additional, and Andratschke, N., additional

Published
2023
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9. SP-0006 Recommendation on the technical and dosimetric data to be included in stereotactic body radiation therapy clinical trial publications based on a systematic review

Author

Josipovic, M., primary, Hardcastle, N., additional, Clementel, E., additional, Gober, M., additional, Wilke, L., additional, Eaton, D., additional, Hernandez, V., additional, Saez, J., additional, Smyth, G., additional, Vieillevigne, L., additional, Jornet, N., additional, and Mancosu, P., additional

Published
2023
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11. Universal evaluation of MLC models in treatment planning systems based on a common set of dynamic tests

Author

Universitat Rovira i Virgili, Saez, J; Bar-Deroma, R; Bogaert, E; Cayez, R; Chow, T; Clark, CH; Esposito, M; Feygelman, V; Monti, AF; -Miguel, JG; Gershkevitsh, E; Goossens, J; Herrero, C; Hussein, M; Khamphan, C; Kierkels, RGJ; Lechner, W; Lemire, M; Nevelsky, A; Nguyen, D; Paganini, L; Pasler, M; Azorín, JFP; Garcia, LIR; Russo, S; Shakeshaft, J; Vieillevigne, L; Hernandez, V, Universitat Rovira i Virgili, and Saez, J; Bar-Deroma, R; Bogaert, E; Cayez, R; Chow, T; Clark, CH; Esposito, M; Feygelman, V; Monti, AF; -Miguel, JG; Gershkevitsh, E; Goossens, J; Herrero, C; Hussein, M; Khamphan, C; Kierkels, RGJ; Lechner, W; Lemire, M; Nevelsky, A; Nguyen, D; Paganini, L; Pasler, M; Azorín, JFP; Garcia, LIR; Russo, S; Shakeshaft, J; Vieillevigne, L; Hernandez, V

Abstract

To demonstrate the feasibility of characterising MLCs and MLC models implemented in TPSs using a common set of dynamic beams.A set of tests containing synchronous (SG) and asynchronous sweeping gaps (aSG) was distributed among twenty-five participating centres. Doses were measured with a Farmer-type ion chamber and computed in TPSs, which provided a dosimetric characterisation of the leaf tip, tongue-and-groove, and MLC transmission of each MLC, as well as an assessment of the MLC model in each TPS. Five MLC types and four TPSs were evaluated, covering the most frequent combinations used in radiotherapy departments.Measured differences within each MLC type were minimal, while large differences were found between MLC models implemented in clinical TPSs. This resulted in some concerning discrepancies, especially for the HD120 and Agility MLCs, for which differences between measured and calculated doses for some MLC-TPS combinations exceeded 10%. These large differences were particularly evident for small gap sizes (5 and 10 mm), as well as for larger gaps in the presence of tongue-and-groove effects. A much better agreement was found for the Millennium120 and Halcyon MLCs, differences being within ±5% and ±2.5%, respectively.The feasibility of using a common set of tests to assess MLC models in TPSs was demonstrated. Measurements within MLC types were very similar, but TPS dose calculations showed large variations. Standardisation of the MLC configuration in TPSs is necessary. The proposed procedure can be readily applied in radiotherapy departments and can be a valuable tool in IMRT and credentialing audits.Copyright © 2023. Published by Elsevier B.V.

Published
2023

14. OC-0609 Radiotherapy quality assurance of the PEACE-1 trial: Initial results of individual case reviews

Author

Alyamani, N., primary, Sargos, P., additional, Blanchard, P., additional, Supiot, S., additional, Ronchin, P., additional, Pommier, P., additional, Duberge, T., additional, Silva, M., additional, Hammoud, Y., additional, Hasbini, A., additional, Khalifa, J., additional, Gnep, K., additional, Scrase, C., additional, Saez, J., additional, Vieillevigne, L., additional, Christiaens, M., additional, Zilli, T., additional, Ribault, H., additional, Bossi, A., additional, Fizazi, K., additional, and Andratschke, N., additional

Published
2022
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15. OC-0120 MLC modelling assessment with a set of standardized tests: Results from a multicentric study

Author

Saez, J., primary, Bar-Deroma, R., additional, Bogaert, E., additional, Cayez, R., additional, Chow, T., additional, Esposito, M., additional, Feygelman, V., additional, Monti, A.F., additional, Garcia-Miguel, J., additional, Gershkevitsh, E., additional, Goossens, J., additional, Herrero, C., additional, Hussein, M., additional, Khamphan, C., additional, Lechner, W., additional, Lemire, M., additional, Nevelsky, A., additional, Nguyen, D., additional, Paganini, L., additional, Passler, M., additional, Ramos Garcia, L.I., additional, Russo, S., additional, Shakeshaft, J., additional, Vieillevigne, L., additional, and Hernandez, V., additional

Published
2022
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21. OC-0333 Dose-painting multicenter phase III trial in newly diagnosed glioblastoma: the SPECTRO-GLIO trial

Author

Laprie, A., primary, Noel, G., additional, Chaltiel, L., additional, Truc, G., additional, Sunyach, M., additional, Charissoux, M., additional, Magné, N., additional, Auberdiac, P., additional, Ken, S., additional, Roux, F., additional, Vieillevigne, L., additional, Tensaouti, F., additional, Catalaa, I., additional, Boetto, S., additional, Uro-Coste, E., additional, Supiot, S., additional, Bernier, V., additional, Filleron, T., additional, Mounier, M., additional, Poublanc, M., additional, Delord, J., additional, and Cohen-Jonathan-Moyal, E., additional

Published
2021
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23. Additional file 1 of Quality assurance of radiotherapy in the ongoing EORTC 1420 'Best of' trial for early stage oropharyngeal, supraglottic and hypopharyngeal carcinoma: results of the benchmark case procedure

Author

Stelmes, J-J, Vu, E., Grégoire, V., Simon, C., Clementel, E., Kazmierska, J., Grant, W., Ozsahin, M., Tomsej, M., Vieillevigne, L., Fortpied, C., Hurkmans, E. C., Branquinho, A., Andratschke, N., Zimmermann, F., and Weber, D.-C.

Subjects
Data_FILES
Abstract

Additional file 1: BC description, protocol predefined criterions for BC review, and corresponding number of all unacceptable criterions.

Published
2021
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24. Quality assurance of radiotherapy in the ongoing EORTC 1420 'Best of' trial for early stage oropharyngeal, supraglottic and hypopharyngeal carcinoma: results of the benchmark case procedure

Author

Stelmes, J-J; https://orcid.org/0000-0003-4887-6039, Vu, E, Grégoire, V, Simon, C, Clementel, E, Kazmierska, J, Grant, W, Ozsahin, M, Tomsej, M, Vieillevigne, L, Fortpied, C, Hurkmans, E C, Branquinho, A, Andratschke, N, Zimmermann, F, Weber, D-C, Stelmes, J-J; https://orcid.org/0000-0003-4887-6039, Vu, E, Grégoire, V, Simon, C, Clementel, E, Kazmierska, J, Grant, W, Ozsahin, M, Tomsej, M, Vieillevigne, L, Fortpied, C, Hurkmans, E C, Branquinho, A, Andratschke, N, Zimmermann, F, and Weber, D-C

Abstract

INTRODUCTION The current phase III EORTC 1420 Best-of trial (NCT02984410) compares the swallowing function after transoral surgery versus intensity modulated radiotherapy (RT) in patients with early-stage carcinoma of the oropharynx, supraglottis and hypopharynx. We report the analysis of the Benchmark Case (BC) procedures before patient recruitment with special attention to dysphagia/aspiration related structures (DARS). MATERIALS AND METHODS Submitted RT volumes and plans from participating centers were analyzed and compared against the gold-standard expert delineations and dose distributions. Descriptive analysis of protocol deviations was conducted. Mean Sorensen-Dice similarity index (mDSI) and Hausdorff distance (mHD) were applied to evaluate the inter-observer variability (IOV). RESULTS 65% (23/35) of the institutions needed more than one submission to achieve Quality assurance (RTQA) clearance. OAR volume delineations were the cause for rejection in 53% (40/76) of cases. IOV could be improved in 5 out of 12 OARs by more than 10 mm after resubmission (mHD). Despite this, final IOV for critical OARs in delineation remained significant among DARS by choosing an aleatory threshold of 0.7 (mDSI) and 15 mm (mHD). CONCLUSIONS This is to our knowledge the largest BC analysis among Head and neck RTQA programs performed in the framework of a prospective trial. Benchmarking identified non-common OARs and target delineations errors as the main source of deviations and IOV could be reduced in a significant number of cases after this process. Due to the substantial resources involved with benchmarking, future benchmark analyses should assess fully the impact on patients' clinical outcome.

Published
2021

25. Dosimetric leaf gap and leaf trailing effect in a double-stacked multileaf collimator

Author

Universitat Rovira i Virgili, Hernandez, V; Saez, J; Angerud, A; Cayez, R; Khamphan, C; Nguyen, D; Vieillevigne, L; Feygelman, V, Universitat Rovira i Virgili, and Hernandez, V; Saez, J; Angerud, A; Cayez, R; Khamphan, C; Nguyen, D; Vieillevigne, L; Feygelman, V

Abstract

Purpose To investigate (i) the dosimetric leaf gap (DLG) and the effect of the "trailing distance" between leaves from different multileaf collimator (MLC) layers in Halcyon systems and (ii) the ability of the currently available treatment planning systems (TPSs) to approximate this effect.Methods DICOM plans with transmission beams and sweeping gap tests were created in Python for measuring the DLG for each MLC layer independently and for both layers combined. In clinical Halcyon plans both MLC layers are interchangeably used and leaves from different layers are offset, thus forming a trailing pattern. To characterize the impact of such configuration, new tests called "trailing sweeping gaps" were designed and created where the leaves from one layer follow the leaves from the other layer at a fixed "trailing distance" t between the tips. Measurements were carried out on five Halcyons SX2 from different institutions and calculations from both the Eclipse and RayStation TPSs were compared with measurements.Results The dose accumulated during a sweeping gap delivery progressively increased with the trailing distance t. We call this "the trailing effect." It is most pronounced for t between 0 and 5 mm, although some changes were obtained up to 20 mm. The dose variation was independent of the gap size. The measured DLG values also increased with t up to 20 mm, again with the steepest variation between 0 and 5 mm. Measured DLG values were negative at t = 0 (the leaves from both layers at the same position) but changed sign for t >= 1 mm, in line with the positive DLG sign usually observed with single-layer rounded-end MLCs. The Eclipse TPS does not explicitly model the leaf tip and, as a consequence, could not predict the dose reduction due to the trailing effect. This resul

Published
2021

28. PO-1559: Survival prediction in GBM using radiomics of multimodal imaging

Author

Tensaouti, F., primary, Bailleul, J., additional, Martin, E., additional, Desmoulin, F., additional, Ken, S., additional, Desrousseaux, J., additional, Vieillevigne, L., additional, Lotterie, J., additional, Lubrano, V., additional, Catalaa, I., additional, Noël, G., additional, Truc, G., additional, Sunyach, M., additional, Charissoux, M., additional, Magné, N., additional, Filleron, T., additional, Péran, P., additional, Cohen-Jonathan Moyal, E., additional, and Laprie, A., additional

Published
2020
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35. On the need for tuning the dosimetric leaf gap for stereotactic treatment plans in the Eclipse treatment planning system

Author

Universitat Rovira i Virgili, Vieillevigne, L; Khamphan, C; Saez, J; Hernandez, V, Universitat Rovira i Virgili, and Vieillevigne, L; Khamphan, C; Saez, J; Hernandez, V

Abstract

The dosimetric leaf gap (DLG) and tongue-and-groove (T&G) effects are critical aspects in the modeling of multileaf collimators (MLC) in the treatment planning system (TPS). In this study, we investigated the dosimetric impact of limitations associated with the T&G modeling in stereotactic plans and its relationship with the need for tuning the DLG in the Eclipse TPS. Measurements were carried out using Varian TrueBeam STx systems from two different institutions. Test fields presenting MLC patterns with several MLC gap sizes (meanGap) and different amounts of T&G effect (TGi) were first evaluated. Secondly, dynamic conformal arc (DCA) and volumetric modulated arc therapy (VMAT) deliveries of stereotactic cases were analyzed in terms of meanGap and TGi. Two DLG values were used in the TPS: the measured DLG (DLG(meas)) and an optimal DLG (DLG(opt)). Measured and calculated doses were compared according to dose differences and gamma passing rates (GPR) with strict local gamma criteria of 2%/2 mm. The discrepancies were analyzed for DLG(meas) and DLG(opt), and their relationships with both TGi and meanGap were investigated. DCA arcs involved significantly lower TGi and larger meanGap than VMAT arcs (p < 0.0001). By using DLG(meas) in the TPS, the dose discrepancies increased as TGi increased and meanGap decreased for both test fields and clinical plans. Dose discrepancies dramatically increased with the ratio TGi/meanGap. Adjusting the DLG value was then required to achieve acceptable calculations and configuring the TPS with DLG(opt) led to an excellent agreement with median GPRs (2%/2 mm) > 99% for both institutions. We also showed that DLG(opt) could be obtained from the results of the test fields. We demonstrated that the need for tuning the DLG is due to the limitation

Published
2019

37. Radiothérapie des cancers de l’oropharynx

Author

Vieillevigne L, Servagi Vernat S, Tochet F, Philippe Giraud, Yoann Pointreau, and P. Maingon

Subjects
medicine.medical_specialty, business.industry, medicine.medical_treatment, Brachytherapy, Dose fractionation, Cancer, medicine.disease, Radiation therapy, 03 medical and health sciences, 0302 clinical medicine, Oropharyngeal Neoplasm, Oncology, 030220 oncology & carcinogenesis, Concomitant, otorhinolaryngologic diseases, medicine, Carcinoma, Radiology, Nuclear Medicine and imaging, Radiology, 030223 otorhinolaryngology, business, Chemoradiotherapy
Abstract

Indication, doses, technique of radiotherapy and concomitant chemotherapy for oropharynx carcinoma are presented. The recommendations for delineation of the target volumes and organs at risk are detailed.

Published
2016

42. PO-0957 Radiomics study from the dose-painting multicenter phase III trial on newly diagnosed glioblastoma

Author

Tensaouti, F., primary, Bailleul, J., additional, Martin, E., additional, Desmoulin, F., additional, Ken, S., additional, Desrousseaux, J., additional, Vieillevigne, L., additional, Lotterie, J., additional, Lubrano, V., additional, Catalaa, I., additional, Noël, G., additional, Truc, G., additional, Sunyach, M., additional, Charissoux, M., additional, Magné, N., additional, Auberdiac, P., additional, Filleron, T., additional, Peran, P., additional, Moyal, E. Cohen-Jonathan, additional, and Laprie, A., additional

Published
2019
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47. 15 Characterization of an aSi-1000 EPID response in integrated and continuous acquisition modes for SBRT dosimetry applications

Author

Barbeiro, A.R., primary, Parent, L., additional, Chatrie, F., additional, Ferrand, R., additional, Younan, F., additional, Simon, L., additional, Vieillevigne, L., additional, Lazaro, D., additional, Tromson, D., additional, Cunrath, A.L., additional, Le Lann, M.V., additional, Mazurier, J., additional, and Franceries, X., additional

Published
2018
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