tel-00426889, version 1 - 28 Oct 2009 Chapitre 1 : Le <strong>contrôle</strong> <strong>de</strong> <strong>qualité</strong> d’imageur portal en radiothérapie 1.5. Conclusions Conclusions Dans ce chapitre, nous avons présenté <strong>de</strong>s outils logiciels pour l’automatisation <strong>de</strong>s <strong>contrôle</strong>s <strong>de</strong> <strong>qualité</strong> <strong>de</strong> l’image, <strong>contrôle</strong>s géométriques et mécaniques <strong>de</strong> l’imageur portal haute énergie « EPID ». Des outils logiciels ont été utilisés et spécifiquement <strong>de</strong>s algorithmes pour la détection <strong>de</strong> la position et <strong>de</strong> l’orientation <strong>du</strong> fantôme ont été utilisés. Ces algorithmes permettent <strong>de</strong> détecter la translation et la rotation <strong>du</strong> fantôme par rapport au centre <strong>de</strong> l’image ; les rotations et translations qui ont été calculées sont ensuite appliquées à toutes les ROI dans l’image afin que celles ci soient parfaitement alignées sur les inserts constituant l’objet-test. Les <strong>qualité</strong>s <strong>de</strong> l’image en termes <strong>de</strong> contraste, résolution spatiale, distorsions géométriques, linéarité et uniformité <strong>de</strong> réponse <strong>du</strong> système, ont été contrôlées en utilisant l’objet-test EPID-PTW. En ce qui concerne les <strong>contrôle</strong>s géométriques et mécaniques, <strong>de</strong>ux objet-tests ont été utilisés : (1) un cadre métallique carré radio opaque <strong>de</strong> 150 mm <strong>de</strong> côté, (2) une bille <strong>de</strong> Tungstène <strong>de</strong> 6 mm <strong>de</strong> diamètre permettant <strong>de</strong> tester le jeu mécanique <strong>du</strong> capteur en fonction <strong>du</strong> mouvement <strong>du</strong> statif et <strong>du</strong> mouvement vertical <strong>du</strong> capteur lui-même. Les résultats obtenus ont montré l’efficacité <strong>de</strong> ces outils pour un <strong>contrôle</strong> <strong>de</strong> <strong>qualité</strong> automatique, objectif, repro<strong>du</strong>ctible, et rapi<strong>de</strong>. Le <strong>contrôle</strong> automatique complet est effectué en 5 secon<strong>de</strong>s, alors qu’un <strong>contrôle</strong> « manuel » prend environ 2 heures. 50
tel-00426889, version 1 - 28 Oct 2009 Chapitre 1 : Le <strong>contrôle</strong> <strong>de</strong> <strong>qualité</strong> d’imageur portal en radiothérapie Bibliographie Bibliographie Antonuk, L. E. (2002) Electronic portal imaging <strong>de</strong>vices: a review and historical perspective of contemporary technologies and research. Phys Med Biol, 47(6): R31-65. Baily, N. A., Horn, R. A. and Kampp, T. D. (1980) Fluoroscopic visualization of megavoltage therapeutic x ray beams. Int J Radiat Oncol Biol Phys, 6(7): 935- 9. Boyer, A. L., Antonuk, L., Fenster, A., Van Herk, M., Meertens, H., Munro, P., Reinstein, L. E. and Wong, J. (1992) A review of electronic portal imaging <strong>de</strong>vices (EPIDs). Med Phys, 19(1): 1-16. Casanova Borca, V., Pasquino, M., Bertodatto, M. and Tofani, S. (2001) [A quality control test of the image obtained with electronic portal imaging <strong>de</strong>vices]. Radiol Med (Torino), 102(4): 266-70. Drake, D. G., Jaffray, D. A. and Wong, J. W. (2000) Characterization of a fluoroscopic imaging system for kV and MV radiography. Med Phys, 27(5): 898-905. Droege, R. T. and Bjarngard, B. E. (1979) Metal screen-film <strong>de</strong>tector MTF at megavoltage x-ray energies. Med Phys, 6(6): 515-8. Droege, R. T. and Morin, R. L. (1982) A practical method to measure the MTF of CT scanners. Med Phys, 9(5): 758-60. Grelot M, B. H., Boutinaud C, Champeaux I, Ginestet C, Lescrainer J (1996) Évaluation <strong>de</strong>s performances <strong>de</strong>s systèmes <strong>d'imagerie</strong> <strong>de</strong> <strong>contrôle</strong>. Société Française <strong>de</strong>s Physiciens d'Hôpital. Herman, M. G., Balter, J. M., Jaffray, D. A., McGee, K. P., Munro, P., Shalev, S., Van Herk, M. and Wong, J. W. (2001) Clinical use of electronic portal imaging: report of AAPM Radiation Therapy Committee Task Group 58. Med Phys, 28(5): 712-37. Herman, M. G., Kruse, J. J. and Hagness, C. R. (2000) Gui<strong>de</strong> to clinical use of electronic portal imaging. J Appl Clin Med Phys, 1(2): 38-57. Leong, J. (1986) Use of digital fluoroscopy as an on-line verification <strong>de</strong>vice in radiation therapy. Phys Med Biol, 31(9): 985-92. Low, D. A., Klein, E. E., Maag, D. K., Umfleet, W. E. and Purdy, J. A. (1996) Commissioning and periodic quality assurance of a clinical electronic portal imaging <strong>de</strong>vice. Int J Radiat Oncol Biol Phys, 34(1): 117-23. Mackie, T. R. and Tome, W. (2008) Advanced image-gui<strong>de</strong>d external beam radiotherapy. Cancer Treat Res, 139: 7-39. Marks, J. E., Haus, A. G., Sutton, H. G. and Griem, M. L. (1976) The value of frequent treatment verification films in re<strong>du</strong>cing localization error in the irradiation of complex fields. Cancer, 37(6): 2755-61. McGarry, C. K., Grattan, M. W. and Cosgrove, V. P. (2007) Optimization of image quality and dose for Varian aS500 electronic portal imaging <strong>de</strong>vices (EPIDs). Phys Med Biol, 52(23): 6865-77. Meertens, H., van Herk, M., Bijhold, J. and Bartelink, H. (1990) First clinical experience with a newly <strong>de</strong>veloped electronic portal imaging <strong>de</strong>vice. Int J Radiat Oncol Biol Phys, 18(5): 1173-81. 51
- Page 1 and 2:
tel-00426889, version 1 - 28 Oct 20
- Page 3 and 4:
tel-00426889, version 1 - 28 Oct 20
- Page 5 and 6:
tel-00426889, version 1 - 28 Oct 20
- Page 7 and 8:
tel-00426889, version 1 - 28 Oct 20
- Page 9 and 10:
tel-00426889, version 1 - 28 Oct 20
- Page 11 and 12: tel-00426889, version 1 - 28 Oct 20
- Page 13 and 14: tel-00426889, version 1 - 28 Oct 20
- Page 15 and 16: tel-00426889, version 1 - 28 Oct 20
- Page 17 and 18: tel-00426889, version 1 - 28 Oct 20
- Page 19 and 20: tel-00426889, version 1 - 28 Oct 20
- Page 21 and 22: tel-00426889, version 1 - 28 Oct 20
- Page 23 and 24: tel-00426889, version 1 - 28 Oct 20
- Page 25 and 26: tel-00426889, version 1 - 28 Oct 20
- Page 27 and 28: tel-00426889, version 1 - 28 Oct 20
- Page 29 and 30: tel-00426889, version 1 - 28 Oct 20
- Page 31 and 32: tel-00426889, version 1 - 28 Oct 20
- Page 33 and 34: tel-00426889, version 1 - 28 Oct 20
- Page 35 and 36: tel-00426889, version 1 - 28 Oct 20
- Page 37 and 38: tel-00426889, version 1 - 28 Oct 20
- Page 39 and 40: tel-00426889, version 1 - 28 Oct 20
- Page 41 and 42: tel-00426889, version 1 - 28 Oct 20
- Page 43 and 44: tel-00426889, version 1 - 28 Oct 20
- Page 45 and 46: tel-00426889, version 1 - 28 Oct 20
- Page 47 and 48: tel-00426889, version 1 - 28 Oct 20
- Page 49 and 50: tel-00426889, version 1 - 28 Oct 20
- Page 51 and 52: tel-00426889, version 1 - 28 Oct 20
- Page 53 and 54: tel-00426889, version 1 - 28 Oct 20
- Page 55 and 56: tel-00426889, version 1 - 28 Oct 20
- Page 57 and 58: tel-00426889, version 1 - 28 Oct 20
- Page 59 and 60: tel-00426889, version 1 - 28 Oct 20
- Page 61: tel-00426889, version 1 - 28 Oct 20
- Page 65 and 66: tel-00426889, version 1 - 28 Oct 20
- Page 67 and 68: tel-00426889, version 1 - 28 Oct 20
- Page 69 and 70: tel-00426889, version 1 - 28 Oct 20
- Page 71 and 72: tel-00426889, version 1 - 28 Oct 20
- Page 73 and 74: tel-00426889, version 1 - 28 Oct 20
- Page 75 and 76: tel-00426889, version 1 - 28 Oct 20
- Page 77 and 78: tel-00426889, version 1 - 28 Oct 20
- Page 79 and 80: tel-00426889, version 1 - 28 Oct 20
- Page 81 and 82: tel-00426889, version 1 - 28 Oct 20
- Page 83 and 84: tel-00426889, version 1 - 28 Oct 20
- Page 85 and 86: tel-00426889, version 1 - 28 Oct 20
- Page 87 and 88: tel-00426889, version 1 - 28 Oct 20
- Page 89 and 90: tel-00426889, version 1 - 28 Oct 20
- Page 91 and 92: tel-00426889, version 1 - 28 Oct 20
- Page 93 and 94: tel-00426889, version 1 - 28 Oct 20
- Page 95 and 96: tel-00426889, version 1 - 28 Oct 20
- Page 97 and 98: tel-00426889, version 1 - 28 Oct 20
- Page 99 and 100: tel-00426889, version 1 - 28 Oct 20
- Page 101 and 102: tel-00426889, version 1 - 28 Oct 20
- Page 103 and 104: tel-00426889, version 1 - 28 Oct 20
- Page 105 and 106: tel-00426889, version 1 - 28 Oct 20
- Page 107 and 108: tel-00426889, version 1 - 28 Oct 20
- Page 109 and 110: tel-00426889, version 1 - 28 Oct 20
- Page 111 and 112: tel-00426889, version 1 - 28 Oct 20
- Page 113 and 114:
tel-00426889, version 1 - 28 Oct 20
- Page 115 and 116:
tel-00426889, version 1 - 28 Oct 20
- Page 117 and 118:
tel-00426889, version 1 - 28 Oct 20
- Page 119 and 120:
tel-00426889, version 1 - 28 Oct 20
- Page 121 and 122:
tel-00426889, version 1 - 28 Oct 20
- Page 123 and 124:
tel-00426889, version 1 - 28 Oct 20
- Page 125 and 126:
tel-00426889, version 1 - 28 Oct 20
- Page 127 and 128:
tel-00426889, version 1 - 28 Oct 20
- Page 129 and 130:
tel-00426889, version 1 - 28 Oct 20
- Page 131 and 132:
tel-00426889, version 1 - 28 Oct 20
- Page 133 and 134:
tel-00426889, version 1 - 28 Oct 20
- Page 135 and 136:
tel-00426889, version 1 - 28 Oct 20
- Page 137 and 138:
tel-00426889, version 1 - 28 Oct 20
- Page 139 and 140:
tel-00426889, version 1 - 28 Oct 20
- Page 141 and 142:
tel-00426889, version 1 - 28 Oct 20
- Page 143 and 144:
tel-00426889, version 1 - 28 Oct 20
- Page 145 and 146:
tel-00426889, version 1 - 28 Oct 20
- Page 147 and 148:
tel-00426889, version 1 - 28 Oct 20
- Page 149 and 150:
tel-00426889, version 1 - 28 Oct 20
- Page 151 and 152:
tel-00426889, version 1 - 28 Oct 20
- Page 153 and 154:
tel-00426889, version 1 - 28 Oct 20
- Page 155 and 156:
tel-00426889, version 1 - 28 Oct 20
- Page 157 and 158:
tel-00426889, version 1 - 28 Oct 20
- Page 159 and 160:
tel-00426889, version 1 - 28 Oct 20
- Page 161 and 162:
tel-00426889, version 1 - 28 Oct 20
- Page 163 and 164:
tel-00426889, version 1 - 28 Oct 20
- Page 165 and 166:
tel-00426889, version 1 - 28 Oct 20
- Page 167 and 168:
tel-00426889, version 1 - 28 Oct 20
- Page 169 and 170:
tel-00426889, version 1 - 28 Oct 20
- Page 171 and 172:
tel-00426889, version 1 - 28 Oct 20
- Page 173 and 174:
tel-00426889, version 1 - 28 Oct 20
- Page 175 and 176:
tel-00426889, version 1 - 28 Oct 20
- Page 177 and 178:
tel-00426889, version 1 - 28 Oct 20
- Page 179 and 180:
tel-00426889, version 1 - 28 Oct 20
- Page 181 and 182:
tel-00426889, version 1 - 28 Oct 20
- Page 183 and 184:
tel-00426889, version 1 - 28 Oct 20
- Page 185 and 186:
tel-00426889, version 1 - 28 Oct 20
- Page 187 and 188:
tel-00426889, version 1 - 28 Oct 20
- Page 189 and 190:
tel-00426889, version 1 - 28 Oct 20
- Page 191 and 192:
tel-00426889, version 1 - 28 Oct 20
- Page 193 and 194:
tel-00426889, version 1 - 28 Oct 20
- Page 195 and 196:
tel-00426889, version 1 - 28 Oct 20
- Page 197 and 198:
tel-00426889, version 1 - 28 Oct 20
- Page 199 and 200:
tel-00426889, version 1 - 28 Oct 20
- Page 201 and 202:
tel-00426889, version 1 - 28 Oct 20
- Page 203 and 204:
tel-00426889, version 1 - 28 Oct 20
- Page 205 and 206:
tel-00426889, version 1 - 28 Oct 20
- Page 207 and 208:
tel-00426889, version 1 - 28 Oct 20
- Page 209 and 210:
tel-00426889, version 1 - 28 Oct 20
- Page 211 and 212:
tel-00426889, version 1 - 28 Oct 20
- Page 213 and 214:
tel-00426889, version 1 - 28 Oct 20
- Page 215 and 216:
tel-00426889, version 1 - 28 Oct 20
- Page 217 and 218:
tel-00426889, version 1 - 28 Oct 20
- Page 219 and 220:
tel-00426889, version 1 - 28 Oct 20
- Page 221 and 222:
tel-00426889, version 1 - 28 Oct 20