目 的 旨在探讨低剂量多层 螺旋CT在肺癌手术后短期复查中的 应用价值。方 法 选取我院2016年4 月-2018年8月肺癌术后30天内回院复 查的患者61例，61例患者均进行常规 CT平扫及低剂量CT扫描。比较两种扫 描方式图像质量、图像优良率及辐射 剂量情况。结 果 常规CT平扫图像质 量评分为(3.52±0.30)分，低剂量CT 图像质量评分为(3.29±0.40)分，常 规CT平扫图像质量评分明显高于低剂 量CT图像质量评分，差异具有统计学 意义(t=3.592，P<0.05)，常规CT平 扫图像优良率为95.08%，低剂量CT图 像优良率为93.44%，常规CT平扫图 像与低剂量CT优良率比较，差异无 统计学意义(χ2 =0.152，P=0.697)； 常规CT平扫CT辐射剂量及CT剂量指 数分别为(19.46±1.30)mGy·cm、 (178.15±16.36)mGy·cm，明显高于 低剂量CT(10.36±1.26)mGy·cm、 (99.94±16.12)mGy·cm，差异具有统 计学意义(P<0.001)。结论 低剂量多层 螺旋CT成像质量高，能满足肺癌术后短 期复查要求且电离辐射小，值得临床推 广。

Objective To explore the application value of low-dose MSCT in shortterm review after lung cancer surgery. Methods 61 patients who returned to our hospital for reexamination within 30 days after the operation of lung cancer from April 2016 to August 2018 were selected. The image quality, image quality and radiation dose of the two scanning methods were compared. Results For conventional CT scan image quality score (3.52±0.30), low dose CT image quality score for (3.29-0.40) and conventional CT scan image quality score significantly higher than that of low dose CT image quality score, statistically significant difference (t=3.592, P< 0.05), the conventional CT scan images was 95.08%, low dose CT images was 93.44%, the conventional CT scan images and low dose CT was compared, there was no statistically significant difference (χ2 = 0.152, P=0.152). The radiation dose and CT dose index of conventional CT plain scan were mGy·cm and mGy·cm respectively (19.46±1.30) and (178.15±16.36), significantly higher than that of low-dose CT (10.36±1.26) and (99.94±16.12) mGy·cm, with statistically significant differences (P<0.001). Conclusion The quality of low-dose multi-slice spiral CT imaging is high, it can meet the requirements of short-term review after lung cancer surgery, and the ionizing radiation is small, which is worthy of clinical promotion.