On-line portal imaging: computer-assisted error measurement.
A microcomputer-based system was implemented in an on-line portal imaging system to determine portal misalignment in radiation therapy. Reference markers derived from a patient simulation film are superposed on the daily on-line portal images for visual evaluation of placement accuracy. The ability to check the alignment after administration of 3-6 cGy of radiation and the minimal operator interaction required make this system useful in radiation therapy delivery.
Lam
W C
WC
Department of Radiation Oncology, Johns Hopkins Oncology Center, Baltimore, MD 21205.
Herman
M G
MG
Lam
K S
KS
Lee
D J
DJ
D008433:Mathematics; D011880:Radiotherapy Planning, Computer-Assisted