低剂量与常规剂量扫描在CT引导下经皮穿刺肺活检术中的临床应用价值对比研究

摘要 目的：比较低剂量与常规剂量扫描在CT引导下经皮穿刺肺活检术中的临床应用价值。方法：选择2018年1月至2019年12月我院行CT引导下经皮穿刺肺活检术的患者96例，采用随机数字表法分为低剂量组和常规剂量组，每组48例，两组分别在低剂量扫描、常规剂扫描下行CT引导下经皮穿刺肺活检术，比较两组扫描范围、X射线剂量、图像质量、穿刺成功率及并发症发生情况。结果：低剂量组CT吸收剂量加权指数（CTDIw）、平均剂量长度乘积（DLP）显著低于常规剂量组（P<0.05），两组扫描范围比较无统计学差异（P>0.05）。低剂量组图像质量1级1例、2级1例、3级46例；常规剂量组1级0例、2级1例、3级47例，两组图像质量比较无统计学差异（P>0.05）。低剂量组穿刺成功率87.50%，常规剂量组穿刺成功率89.58%，两组穿刺成功率比较无统计学差异（P>0.05）。低剂量组并发症发生率为12.50%，常规剂量组并发症发生率为10.42%，两组并发症发生率比较差异无统计学意义（P>0.05）。结论：与常规剂量扫描相比，在CT引导下经皮穿刺肺活检术中应用低剂量扫描可以有效降低辐射剂量，但不影响图像质量和穿刺成功率，患者并发症发生率也未增加，具有较好的临床价值。

A Comparative Study of the Clinical Value of Low Dose and Conventional Dose Scanning in CT Guided Percutaneous Lung Biopsy

ABSTRACT Objective: To compare the clinical value of low dose and conventional dose scanning in CT guided percutaneous lung biopsy. Methods: 96 patients with CT guided percutaneous lung biopsy in our hospital were selected from January 2018 to December 2019, and they were divided into low dose group and conventional dose group by using random digital table method. 48 patients in each group. The two groups were CT guided percutaneous lung biopsy under low dose scanning and conventional dose scanning respectively. The scanning range, X-ray dose, image quality, puncture success rate and complications were compared between the two groups. Results: The CT absorbed dose weighted index (CTDIW) and the product of average dose length (DLP) in the low dose group were significantly lower than those in the conventional dose group (P<0.05), and there was no significant difference in the scanning range between the two groups (P>0.05). In the low dose group, the image quality was grade 1 in 1 case, grade 2 in 1 case and grade 3 in 46 cases, in the routine dose group: Grade 1 in 0 cases, grade 2 in 1 case, grade 3 in 47 cases, there was no significant difference in image quality between the two groups (P>0.05). The success rate of low dose group was 87.50%, while that of conventional dose group was 89.58%. There was no significant difference between the two groups (P>0.05). The incidence of complications was 12.50% in the low-dose group and 10.42% in the conventional dose group. There was no significant difference between the two groups (P>0.05). Conclusion: Compared with conventional dose scanning, low dose scanning in CT guided percutaneous lung biopsy can effectively reduce the radiation dose, but it does not affect the image quality and the success rate of puncture, and the incidence of complications has not increased.