Electronic portal imaging.
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.
van Herk
M
M
Radiotherapy Department, Netherlands Cancer Institute, Amsterdam.
Bel
A
A
Gilhuijs
K G
KG
Lebesque
J V
JV
van Dalen
A
A
van der Ven
P
P
Vijlbrief
R
R
D004867:Equipment Design; D006801:Humans; D007091:Image Processing, Computer-Assisted; D010386:Pelvic Neoplasms / Q000532:radiotherapy; D010388:Pelvis / Q000528:radiation effects; D011785:Quality Assurance, Health Care; D011879:Radiotherapy Dosage; D011880:Radiotherapy Planning, Computer-Assisted / Q000295:instrumentation / Q000379:methods; D011882:Radiotherapy, High-Energy; D015203:Reproducibility of Results