Patient setup verification procedure for a portal image in a computed radiography system with a high-resolution liquid-crystal display monitor.
In our conventional visual inspection for setup verification, we have routinely used a console monitor of a CR system and a monitor of a treatment-planning system (i.e., the separate-monitor method) in order to avoid the need for CR portal-film generation. However, the separate-monitor method provided insufficient precision in detecting setup errors. We devised a setup verification procedure that uses a high-resolution liquid-crystal display monitor (i.e., the single-monitor method). Our objective in the present study was to evaluate the precision of the single-monitor method. These two methods were compared in terms of the precision of visual inspection. The single-monitor method was significantly superior to the separate-monitor method in sensitivity and in the magnitude of the discrepancy that could not be detected. The single-monitor method provides higher precision in visual inspection than does the separate-monitor method, and is a useful verification procedure.
Fujita
Hideki
H
Department of Radiology, Osaka Prefectural Medical Center for Respiratory and Allergic Diseases, Habikino, Osaka, Japan. hima71f@zeus.eonet.ne.jp
Yamaguchi
Michihiro
M
Bessho
Yuichi
Y
Fujioka
Tomio
T
Fukuda
Haruyuki
H
Murase
Kenya
K
D003626:Data Display; D006801:Humans; D007091:Image Processing, Computer-Assisted; D050866:Liquid Crystals; D019300:Medical Errors / Q000517:prevention & control; D011856:Radiographic Image Enhancement / Q000295:instrumentation*; D011881:Radiotherapy, Computer-Assisted / Q000295:instrumentation*; D012189:Retrospective Studies; D013997:Time Factors
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