Search

Your search keyword '"collimated camera"' showing total 3 results
Start Over Descriptor "collimated camera"
3 results on '"collimated camera"'

1. Assessment of Geant4 Prompt-Gamma Emission Yields in the Context of Proton Therapy Monitoring.

Author

Pinto, Marco, Dauvergne, Denis, Krimmer, Jochen, Létang, Jean M., Testa, Etienne, and Freud, Nicolas

Subjects
PROTON therapy, NUCLEAR fragmentation
Abstract

Monte Carlo tools have been long used to assist the research and development of solutions for proton therapy monitoring. The present work focuses on the prompt-gamma emission yields by comparing experimental data with the outcomes of the current version of Geant4 using all applicable proton inelastic models. For the case in study and using the binary cascade model, it was found that Geant4 overestimates the prompt-gamma emission yields by 40.2 ± 0.3%, even though it predicts the prompt-gamma profile length of the experimental profile accurately. In addition, the default implementations of all proton inelastic models show an overestimation in the number of prompt gammas emitted. Finally, a set of built-in options and physically sound Geant4 source code changes have been tested in order to try to improve the discrepancy observed. A satisfactory agreement was found when using the QMD model with a wave packet width equal to 1.3fm°. [ABSTRACT FROM AUTHOR]

Published
2016
Full Text
View/download PDF

2. Time-of-Flight Collimated- and Compton-Cameras Development for Ion Beam Therapy Monitoring

Author

Fontana, Mattia, Balleyguier, L., Bechetoille, E., Bon, D., Caponetto, L., Carlus, B., Chen, X., Dahoumane, M., Dauvergne, D., Delaunay, D., Della Negra, R., Doizon, F., Giraud, N., Krimmer, J., Mathez, H., Montorio, J.-L., Mounier, F., Testa, E., Tromeur, W., Zoccarato, Y., Freud, N., Maxim, Voichita, Létang, J. M., Martin, F., Lambert, D., Magne, M., Montarou, G., Cachemiche, J. P., Morel, C., Rodo-Bordera, M., Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Université Grenoble Alpes [2016-2019] (UGA [2016-2019]), Imagerie Tomographique et Radiothérapie, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), Laboratoire de Physique Corpusculaire - Clermont-Ferrand (LPC), Université Blaise Pascal - Clermont-Ferrand 2 (UBP)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
prompt-gamma, compton camera, [PHYS.PHYS.PHYS-MED-PH]Physics [physics]/Physics [physics]/Medical Physics [physics.med-ph], imaging, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], collimated camera
Abstract

National audience; In ion beam therapy, the increased energy deposition of ions towards the finite range in tissue (Bragg peak) allows a precise dose delivery.With the aim of optimizing the ion treatment effectiveness, a strict range monitoring is mandatory: different solutions have been explored, but an online treatment check is still a challenge.The detection of the prompt-gammas (PG) emitted during treatments has proven its potential in the ion range control in real time (Min et al 2006, Testa et al 2008). The falloff of the PG profile (1D distribution along the beam direction) can be measured with millimetrical precision and correlated to the dose distribution thanks to collimated cameras. Compton cameras are also under study to bring 2D – 3D information on PG distributions. Moreover, the application of the Compton camera in the nuclear medicine field, namely for Single Photon Emission Computer Tomography (SPECT).The development of two prototypes is ongoing in France thanks to the collaboration of five institutions: IPNL (Lyon), CREATIS (Lyon), LPC (Clermont-Ferrand), CPPM (Marseille) and LPSC (Grenoble).The collimated camera design consists of a multi-slit collimator and a segmented absorber made up of 96 BGO streaked blocks, with a position reading pitch of 4 mm in both directions. The same absorber is employed for the Compton camera prototype, together with a stack of 7 double-sided silicon strip detectors (1.41 mm pitch) used as scatter.The use of Time-Of-Flight technique is foreseen for both prototypes in order to maximize the signal (PG) to background (neutron) ratio. A beam tagging hodoscope is then under construction, consisting of two planes of 2 x 128 perpendicular scintillating fibers, read by 64-channel photomultipliers.The three detector components are being tested in the different partner institutions.This contribution will present an overview of the status and perspectives of emission imaging techniques carried out by the collaboration.

Published
2016

3. Assessment of Geant4 Prompt-Gamma Emission Yields in the Context of Proton Therapy Monitoring

Author

Etienne Testa, J. Krimmer, Marco Pinto, Denis Dauvergne, Jean Michel Létang, Nicolas Freud, Rayet, Béatrice, Institut de Physique Nucléaire de Lyon (IPNL), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Imagerie Tomographique et Radiothérapie, Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé (CREATIS), Université de Lyon-Université de Lyon-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Hospices Civils de Lyon (HCL)-Université Jean Monnet - Saint-Étienne (UJM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Jean Monnet [Saint-Étienne] (UJM)-Hospices Civils de Lyon (HCL)-Institut National des Sciences Appliquées de Lyon (INSA Lyon), Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM), and Institut National des Sciences Appliquées (INSA)-Université de Lyon-Institut National des Sciences Appliquées (INSA)-Université de Lyon-Université Claude Bernard Lyon 1 (UCBL)

Subjects
Cancer Research, medicine.medical_specialty, Proton, medicine.medical_treatment, Astrophysics::High Energy Astrophysical Phenomena, Monte Carlo method, Binary number, Geant4, Context (language use), lcsh:RC254-282, 030218 nuclear medicine & medical imaging, in-beam monitoring, 03 medical and health sciences, 0302 clinical medicine, hadrontherapy, prompt gammas, medicine, proton therapy, Medical physics, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Proton therapy, Original Research, Physics, Particle therapy, [PHYS.PHYS.PHYS-MED-PH] Physics [physics]/Physics [physics]/Medical Physics [physics.med-ph], monte carlo, online monitoring, nuclear fragmentation models, Gamma ray, lcsh:Neoplasms. Tumors. Oncology. Including cancer and carcinogens, Computational physics, particle therapy, Oncology, Cascade, [PHYS.PHYS.PHYS-INS-DET] Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], 030220 oncology & carcinogenesis, [PHYS.PHYS.PHYS-MED-PH]Physics [physics]/Physics [physics]/Medical Physics [physics.med-ph], collimated camera
Abstract

International audience; Monte Carlo tools have been long used to assist the research and development of solutions for proton therapy monitoring. The present work focuses on the prompt-gamma emission yields by comparing experimental data with the outcomes of the current version of Geant4 using all applicable proton inelastic models. For the case in study and using the binary cascade model, it was found that Geant4 overestimates the prompt-gamma emission yields by 40.2 ± 0.3%, even though it predicts the prompt-gamma profile length of the experimental profile accurately. In addition, the default implementations of all proton inelastic models show an overestimation in the number of prompt gammas emitted. Finally, a set of built-in options and physically sound Geant4 source code changes have been tested in order to try to improve the discrepancy observed. A satisfactory agreement was found when using the QMD model with a wave packet width equal to 1.3 fm 2 .

Published
2016

Catalog

Books, media, physical & digital resources
See catalog results