医用电子直线加速器快速日检方法研究
|
摘要
该文研究设计了一个可用于不同放疗中心的基于电子射野成像设备(EPID)的快速加速器日检工具。该工具使用EPID快速获取多个方形开野的图像。加速器的主要日检参数由自主开发的软件自动分析这些影像来获取。实验结果表明,工具的检测结果与商用质控(QA)设备测量结果一样可靠,而测量效率更高。
This study presents an electronic portal imaging devices(EPIDs) based on daily check tool for Linac that is usable for different cancer centers. Several images of open rectangle fields were acquired with EPID and the key items of daily Linac check were derived from the obtained images using an in-house developed automatic analysis software. The experiment results showed that each parameter calculated by this tool is as reliable as the corresponding result measured by the commercial quality assurance devices and its measuring efficiency is much higher.
This study presents an electronic portal imaging devices(EPIDs) based on daily check tool for Linac that is usable for different cancer centers. Several images of open rectangle fields were acquired with EPID and the key items of daily Linac check were derived from the obtained images using an in-house developed automatic analysis software. The experiment results showed that each parameter calculated by this tool is as reliable as the corresponding result measured by the commercial quality assurance devices and its measuring efficiency is much higher.
引文
[1]OTTO K.Volumetric modulated arc therapy:IMRT in a single gantry arc[J].Med Phys,2008,35(1):310-317.
[2]LING C C,ZHANG P,ARCHAMBAULT Y,et al.Commissioning and quality assurance of RapidArc radiotherapy delivery system[J].Int J Radiat Oncol Biol Phys,2008,72(2):575-581.
[3]KUTCHER G J,COIA L,GILLIN M,et al.Comprehensive QA for radiation oncology:report of AAPM radiation therapy committee task group 40[J].Med Phys,1994,21(4):581-618.
[4]KLEIN E E,HANLEY J,BAYOUTH J,et al.Task Group 142report:quality assurance of medical accelerators[J].Med Phys,2009,36(9):4197-4212.
[5]SUN B,GODDU S M,YADDANAPUDI S,et al.Daily QA of linear accelerators using only EPID and OBI[J].Med Phys,2015,42(10):5584-5594.
[6]MCCURDY B M,GREER P B.Dosimetric properties of an amorphous-silicon EPID used in continuous acquisition mode for application to dynamic and arc IMRT[J].Med Phys,2009,36(7):3028-3039.
[7]GREER P B,POPESCU C C.Dosimetric properties of an amorphous silicon electronic portal imaging device for verification of dynamic intensity modulated radiation therapy[J].Med Phys,2003,30(7):1618-1627.
[8]MCDERMOTT L N,WENDLING M,VAN ASSELEN B,et al.Clinical experience with EPID dosimetry for prostate IMRT pretreatment dose verification[J].Med Phys,2006,33(10):3921-3930.
[9]SUKUMAR P,PADMANABAN S,JEEVANANDAM P,et al.Astudy on dosimetric properties of electronic portal imaging device and its use as a quality assurance tool in Volumetric Modulated Arc Therapy[J].Rep Pract Oncol Radiother,2011,16(6):248-255.
[10]NJEH C F,CAROPRESE B,DESAI P.A simple quality assurance test tool for the visual verification of light and radiation field congruent using electronic portal images device and computed radiography[J].Radiat Oncol,2012,7(1):49.
[11]ROWSHANFARZAD P,SABET M,BARNES M P,et al.EPID-based verification of the MLC performance for dynamic IMRT and VMAT[J].Med Phys,2012,39(10):6192-6207.
[12]MEI X,NYGREN I,VILLARREAL-BARAJAS J E.On the use of the MLC dosimetric leaf gap as a quality control tool for accurate dynamic IMRT delivery[J].Med Phys,2011,38(4):2246-2255.
[13]POLAK W,O'DOHERTY J,JONES M.Automated x-ray/light field congruence using the LINAC EPID panel[J].Med Phys,2013,40(3):031718.
[14]BUDGELL G J,ZHANG R,MACKAY R I.Daily monitoring of linear accelerator beam parameters using an amorphous silicon EPID[J].Phys Med Biol,2007,52(6):1721-1733.
[15]CHATELAIN C,VETTERLI D,HENZEN D,et al.Dosimetric properties of an amorphous silicon EPID for verification of modulated electron radiotherapy[J].Med Phys,2013,40(6):061710.
[16]BALTER J M,JAFFRAY D A,MCGEE K P,et al.Clinical use of electronic portal imaging:report of AAPM Radiation Therapy Committee Task Group 58[J].Med Phys,2001,28(5):712-737.
[17]MANS A,REMEIJER P,OLACIREGUI-RUIZ I,et al.3DDosimetric verification of volumetric-modulated arc therapy by portal dosimetry[J].Radiother Oncol,2010,94(2):181-187.
[18]ZHU Y,JIANG X Q,VAN DYK J.Portal dosimetry using a liquid ion chamber matrix:Dose response studies[J].Med Phys,1995,22(7):1101-1106.
[19]NICOLINI G,VANETTI E,CLIVIO A,et al.The GLAaSalgorithm for portal dosimetry and quality assurance of RapidArc,an intensity modulated rotational therapy[J].Radiat Oncol,2008,3(1):24.
[20]FOGLIATA A,CLIVIO A,FENOGLIETTO P,et al.Quality assurance of RapidArc in clinical practice using portal dosimetry[J].Br J Radiol,2014,84(1002):534-545.
[2]LING C C,ZHANG P,ARCHAMBAULT Y,et al.Commissioning and quality assurance of RapidArc radiotherapy delivery system[J].Int J Radiat Oncol Biol Phys,2008,72(2):575-581.
[3]KUTCHER G J,COIA L,GILLIN M,et al.Comprehensive QA for radiation oncology:report of AAPM radiation therapy committee task group 40[J].Med Phys,1994,21(4):581-618.
[4]KLEIN E E,HANLEY J,BAYOUTH J,et al.Task Group 142report:quality assurance of medical accelerators[J].Med Phys,2009,36(9):4197-4212.
[5]SUN B,GODDU S M,YADDANAPUDI S,et al.Daily QA of linear accelerators using only EPID and OBI[J].Med Phys,2015,42(10):5584-5594.
[6]MCCURDY B M,GREER P B.Dosimetric properties of an amorphous-silicon EPID used in continuous acquisition mode for application to dynamic and arc IMRT[J].Med Phys,2009,36(7):3028-3039.
[7]GREER P B,POPESCU C C.Dosimetric properties of an amorphous silicon electronic portal imaging device for verification of dynamic intensity modulated radiation therapy[J].Med Phys,2003,30(7):1618-1627.
[8]MCDERMOTT L N,WENDLING M,VAN ASSELEN B,et al.Clinical experience with EPID dosimetry for prostate IMRT pretreatment dose verification[J].Med Phys,2006,33(10):3921-3930.
[9]SUKUMAR P,PADMANABAN S,JEEVANANDAM P,et al.Astudy on dosimetric properties of electronic portal imaging device and its use as a quality assurance tool in Volumetric Modulated Arc Therapy[J].Rep Pract Oncol Radiother,2011,16(6):248-255.
[10]NJEH C F,CAROPRESE B,DESAI P.A simple quality assurance test tool for the visual verification of light and radiation field congruent using electronic portal images device and computed radiography[J].Radiat Oncol,2012,7(1):49.
[11]ROWSHANFARZAD P,SABET M,BARNES M P,et al.EPID-based verification of the MLC performance for dynamic IMRT and VMAT[J].Med Phys,2012,39(10):6192-6207.
[12]MEI X,NYGREN I,VILLARREAL-BARAJAS J E.On the use of the MLC dosimetric leaf gap as a quality control tool for accurate dynamic IMRT delivery[J].Med Phys,2011,38(4):2246-2255.
[13]POLAK W,O'DOHERTY J,JONES M.Automated x-ray/light field congruence using the LINAC EPID panel[J].Med Phys,2013,40(3):031718.
[14]BUDGELL G J,ZHANG R,MACKAY R I.Daily monitoring of linear accelerator beam parameters using an amorphous silicon EPID[J].Phys Med Biol,2007,52(6):1721-1733.
[15]CHATELAIN C,VETTERLI D,HENZEN D,et al.Dosimetric properties of an amorphous silicon EPID for verification of modulated electron radiotherapy[J].Med Phys,2013,40(6):061710.
[16]BALTER J M,JAFFRAY D A,MCGEE K P,et al.Clinical use of electronic portal imaging:report of AAPM Radiation Therapy Committee Task Group 58[J].Med Phys,2001,28(5):712-737.
[17]MANS A,REMEIJER P,OLACIREGUI-RUIZ I,et al.3DDosimetric verification of volumetric-modulated arc therapy by portal dosimetry[J].Radiother Oncol,2010,94(2):181-187.
[18]ZHU Y,JIANG X Q,VAN DYK J.Portal dosimetry using a liquid ion chamber matrix:Dose response studies[J].Med Phys,1995,22(7):1101-1106.
[19]NICOLINI G,VANETTI E,CLIVIO A,et al.The GLAaSalgorithm for portal dosimetry and quality assurance of RapidArc,an intensity modulated rotational therapy[J].Radiat Oncol,2008,3(1):24.
[20]FOGLIATA A,CLIVIO A,FENOGLIETTO P,et al.Quality assurance of RapidArc in clinical practice using portal dosimetry[J].Br J Radiol,2014,84(1002):534-545.