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目的探讨小剂量分段多层螺旋CT扫描技术在下肢常规检查中的防护价值。方法选新鲜尸体6例,2例女性,4例男性和100例大样本病例对照。行常规及小剂量下肢多层螺旋CT扫描,观察比较其对病变的定量及定性诊断的差异和辐射剂量的差异。结果与常规剂量多层螺旋CT扫描相比,多层螺旋CT小剂量扫描对病变的定性与定量诊断无明显差异,但是辐射剂量有大幅度下降。结论多层螺旋CT小剂量扫描技术适用于下肢病变的常规检查,有利于患者的辐射防护。
Objective To investigate the protective value of small-dose multi-slice spiral CT in the routine examination of lower limbs. Methods Six fresh corpses, two females, four males and 100 large sample cases were selected as control. Routine and low-dose multi-slice spiral CT of lower extremity scans, observe and compare the quantitative and qualitative diagnostic differences and radiation dose differences. Results Compared with conventional multi-slice spiral CT, there was no significant difference in qualitative and quantitative diagnosis of lesion with multi-slice spiral CT. However, the radiation dose decreased significantly. Conclusion MSCT low-dose scanning technique is suitable for the routine examination of lower extremity lesions and is beneficial to the radiation protection of patients.