1. Electronic portal imaging
- Author
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Marcel van Herk, Bel, A., Gilhuijs, K. G. A., Lebesque, J. V., Dalen, A., Ven, P., Vijlbrief, R., and Other departments
- Abstract
In our institute, we have developed an electronic portal imaging system based on a matrix of 256 x 256 ionisation chambers. By improvements to the electronics, the system produces images with the same quality as the original system but 3-10 times faster. Software for automatic image analysis has been applied to more than 10,000 images over the last two years. Using an off-line correction strategy, the systematic patient set-up error has been limited to 5 mm or less for 98% of the patients treated for prostate cancer