問題詳情

42.對於血管內近接治療（IVBT），治療靶區的劑量率（Gy/min）應至少大於下列何者？
(A)0.2
(B)2
(C)5
(D)10

參考答案

答案：C
難度：計算中-1
書單：沒有書單，新增

用户評論

【Klose Liu】評論

 IVBT significantly lowers the rate of neointimal formation, thereby reducing the risk of restenosis.The target volume for IVBT is typically 2 to 5 cm in length of artery and 0.5 to 2 mm of arterial wall.The AAPM-recommended depth of dose prescription is 2 mm from the center of the source for intracoronary irradiation. For the peripheral arteries, it is 2 mm beyond the average lumen radius.High-dose-rate (e.g., 5 Gy/min or greater) β sources are preferable for IVBT over g sources.Catheter-based