低剂量螺旋CT扫描体检筛查肺癌的研究

Low-dosage he1ical CT applications for chest medical checkup and lung cancer screening

目的讨论用低剂量螺旋CT对胸部体检筛查肺癌的应用研究。方法对100例胸部体检者采用3组不同扫描参数扫描,对常规剂量管电流230mAs,低剂量50mAs和30mAs扫描图像进行比较。结果在低剂量螺旋CT扫描时,扫描图像仍然清清晰,扫描信息完整。对100例胸部体检者,共检出结节或肿块39个,肿大淋巴结1例,肺大泡与肺气肿3个肺段,支气管壁增厚2例,局限性胸膜增厚1例。结论用低剂量(管电流300mAs螺旋CT扫描,即能保证图像质量,又具有较低的辐射剂量,适量胸部体检肺癌筛查工作。

Objective A disussion on low- dosage helcal CT aoolications on chest medical checkup and lung cancer screening .Methods On the 100 chest medical check up with three different of protocols, including standard- dosage(the tube current was 230 mAs) were compared with low- dose (tube current was 50 mAs or 30 mAs).Results Low- dosage helical CT scan provides excellent images. In 100 chest medical checkup, 39 nodules or masses were revealed, enlarged lymph node was noted in 1 case; emphysema or bullae was demonstrated in 3 segments;thickening of bronchial wall was showm in 2 cases; and localized pleural thickening was found in 1 case.Conclusion In chest checkup or lung cancer screening low- dosage helical CT (tube current 30 mAs)will not only guarantee image quality but also reduce the radiation dose during the examination. [