VarianMedicalSystemBeijingEducationFortrainingpropose VarianMedicalSystemBeijingEducationFortrainingpropose VarianMedicalSystemBeijingEducationFortrainingpropose 幾何精度的QA(1次/2周)VarianMedicalSystemBeijingEducationFortrainingpropose VarianMedicalSystemBeijingEducationFortrainingpropose 檢測方法：立方體模體的0°、270°正側(cè)位圖像，在正側(cè)位圖像上顯精度要求：等中心精度偏差應(yīng)小于VarianMedicalSystemBeijingEducationFortrainingpropose VarianMedicalSystemBeijingEducationFortrainingpropose VarianMedicalSystemBeijingEducationFortrainingpropose VarianMedicalSystemBeijingEducationFortrainingpropose VarianMedicalSystemBeijingEducationFortrainingpropose VarianMedicalSystemBeijingEducationFortrainingpropose VarianMedicalSystemBeijingEducationFortrainingpropose 精度要求：等中心點精度應(yīng)小于VarianMedicalSystemBeijingEducationFortrainingpropose 精度要求：等中心點精度應(yīng)小于VarianMedicalSystemBeijingEducationFortrainingpropose 圖像質(zhì)量的QA1次/2X線平片圖像密度分辨率空間分辨率密度分辨率的空間分辨率的CT值的均一性的圖像重建精度的掃描層厚的VarianMedicalSystemBeijingEducationFortrainingpropose 用UABX個對比度范圍從4.到.9KD的位置為－50m，UABK14cm×4，在S1視模式選用70V3A65、5m，析 檢測方法：使用線對卡測量X線平片的空間分辨率。它有20個0.5lp- 精度要求：空間分辨率小于VarianMedicalSystemBeijingEducationFortrainingpropose VarianMedicalSystemBeijingEducationFortrainingpropose :125KV、80mA、25ms，重建矩陣為512×512，層厚2.5mm。CatPhan504模體中的CTP404模塊包含7種不同密度的物質(zhì)，測量每種物質(zhì)的平均CT值， VarianMedicalSystemBeijingEducationFortrainingpropose :125KV、80mA、25ms，重建矩陣為512×512，層厚2.5mm。CatPhan504模體中的CTP515模塊有三組每組9個直徑從2mm－15mm大小的圓盤組成，三組圓盤的密度分辨率分別是1%、0.5%、0.3%。物理師分析的CT圖像VarianMedicalSystemBeijingEducationFortrainingpropose :125KV、80mA、25ms，重建矩陣為512×512，層厚2.5mmCatPhan504模體中的CTP528模塊包含21組柵形圖案，空間分辨率的大小范圍是從1-精度要求：最小值是VarianMedicalSystemBeijingEducationFortrainingpropose :125KV、80mA、25ms，重建矩陣為512×512，層厚2.5mm。CatPhan504模體中的CTP486模塊是一個密度一致，直徑20cm的圓柱體，用來檢測CT值的 VarianMedicalSystemBeijingEducationFortrainingpropose :125KV、80mA、25ms，重建矩陣為512×512，層厚2.5mm。CatPhan504模體中的CTP404模塊中的斜線測量，該斜線與橫斷面CT圖像的夾角為23°。VarianMedicalSystemBeijingEducationFortrainingpropose :125KV、80mA、25ms，重建矩陣為512×512，層厚2.5mm。