X光電腦斷層系統之物理測試彙整建議：中華民國醫學物理學會電腦斷層工作群報告

Review and Recommendations for Physics Testing of X-ray Computed Tomography: CSMPT CT Task Group Report

蔡惠予(Hui-Yu Tsai) ； 陳建全(Chien-Chuan Chen) ； 黃怡璇(Yi-Shuan Hwang) ； 劉鶴齡(Ho-Ling Liu)

《中華放射線醫學雜誌》 34卷3期 (2009/09) Pp. 173-184

摘要

中華民國醫學物理學會電腦斷層工作群匯集相關文獻，歸納「X光電腦斷層系統之物理測試彙整建議」報告，報告內容涵括十二項電腦斷層系統之物理測試，每個測試項目軍列出測試目的、所需設備、測試步驟、效能判定準則與修正措施。所有項目可區分為五類，第一類為系統安全評估；第二類為機械幾何評估，包含檢查床與機頭之對位、切片位置準確性及機頭傾斜準確性測試；第三類為影像品質評估，包含切片厚度準確性、CT值準確度與線性度、水假體影像評估、空間解析度及低對比偵測度測試；第四類為劑量評估，包含劑量評估及輻射寬度測試；第五類為影像顯示器評估。

並列摘要

The purpose of this report is to review and recommend physics testing of x-ray computed tomography (CT) systems, made by the CT task group of the Chinese Society of Medical Physics, Taipei. Twelve testing items were proposed in five categories. For each item, purpose, equipment, procedure and criteria were summarized. The first category is system safety evaluation. The second is mechanical and geometric assessment, including alignment of table to gantry, slice positioning accuracy and gantry tile accuracy. The third is image quality assessment, including slice thickness accuracy, CT number accuracy and linearity, evaluation of image uniformity, noise, and artifact, spatial resolution and low contrast detectability. The fourth is dose assessment, including dosimetry and radiation width. The final category is image display device evaluation.