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Image timing and detector performance of a matrix ion-chamber electronic portal imaging device
1Oncology Department, Auckland Hospital, New Zealand.
Australasian Physical & Engineering Sciences in Medicine
|December 1, 1996
Abstract:
Image timing and input/output characteristics of a Varian PortalVision matrix liquid ion-chamber electronic portal imaging device (EPID) used with a Varian CL2100C/D linear accelerator were investigated to examine the variation in image timing and detector performance with acquisition mode. Contrast-detail curves showed that the input/output results were indicative of the image quality variation with acquisition mode. Overall for this accelerator/EPID arrangement the 500 MU/min repetition rate gives the best image quality for the 6 MV and 18 MV acquisition modes.