SHINICHI INOUE, MITSUHIRO MATSUMOTO, HIRONORI HASEGAWA, KAZUHIKO SATOH, KUNIAKI SAKURAI, YASUMITSU KAWAGOE, and YOSHIMI KUSUMI
Department of Radiology, Osaka University Hospital
| Original | Jpn J Radiol Technol 1999 ; |
| Analysis of Verification Image Using Electronic Portal Imaging Devices(EPID) |
SHINICHI INOUE, MITSUHIRO MATSUMOTO, HIRONORI HASEGAWA, KAZUHIKO SATOH, KUNIAKI SAKURAI, YASUMITSU KAWAGOE, and YOSHIMI KUSUMI |
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Department of Radiology, Osaka University Hospital |
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| Received Aug. 14, 1998; Revision accepted Feb. 22, 1999; Code Nos. 400, 410 |
| Summary |
| We studied the evaluation of patient set-up error by verification image using electronic portal imaging devices(EPID). We analyzed which cleared 3 mm in our hospital for visual by using a distance measurement function. The body parts examined included the head and neck, thorax, pelvis and abdomen. The items that were evaluated included shell, Pb block, multi-leaf collimator and landmark. Patient set-up error was 10.4%, with that for the pelvis especially poor. The visual false rate was 17.9%. The result for the abdomen was poor because of the absence of landmark. We showed a decrease in patient set-up error by using EPID and improvement of radiotherapy . |
| Key words: | Radiotherapy, Electronic portal imaging device(EPID), Verification |
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