论文部分内容阅读
作者对1520名志愿者行初筛CT扫描和随后的每年1次的重复CT扫描。采用多层螺旋CT扫描,参数为5mm层厚,3.5mm重组间隔,螺距为1.5,120kV,40mA。有效剂量当量为0.65mSv。扫描范围从胸骨切迹至骼嵴。从肺窗、软组织窗、骨窗观察影像。对不能确定的结节处理原则如下:<4mm的结节,6个月行1次CT检查;≥4mm且<8mm的结节,3个月一次CT检查;8～20 mm的结节,立即行CT检查并行增强CT或PET检查;>20mm的结节行活检。如果观察2a结节仍稳定或变小则为良性;否则认为是不能定性的结节。
The authors performed a primary screening CT scan of 1520 volunteers followed by an annual repeat CT scan. Using multi-slice spiral CT scan, the parameters of 5mm layer thickness, 3.5mm recombination interval, pitch is 1.5,120kV, 40mA. The effective dose equivalent is 0.65 mSv. Scanning range from the sternal notch to the iliac crest. From the lung window, soft tissue window, bone window to observe the image. The undetermined nodule treatment principles are as follows: <4mm nodules, 6 months line 1 CT examination; 4mm and <8mm nodules, 3 months a CT examination; 8-20mm nodules, immediately CT scan line enhanced CT or PET examination;> 20mm nodules biopsy. If it is observed 2a nodules are still stable or smaller then benign; otherwise it is not qualitative nodules.