低剂量螺旋CT扫描在早期肺癌诊断中的应用价值
2020-08-20杨锦汉
杨锦汉


摘要:目的:探讨低剂量螺旋CT扫描在早期肺癌诊断中的应用价值。方法:选取2016年3月-2018年3月65例早期肺癌患者,均采取螺旋CT低剂量、常规剂量扫描,观察两种扫描方式的肿瘤形态、辐射剂量。结果:常规剂量CT早期肺癌准确率(96.92%)与低剂量准确率(93.85%)对比无明显差异(P>0.05);低剂量与常规剂量对毛刺征血管集束征、分叶征、空泡征的检出率无明显对比差异(P>0.05);低剂量检查的最大有效辐射剂量、CTDIw、DLP均少于常规剂量,差异显著(P<0.05)。结论:低剂量螺旋CT扫描在早期肺癌诊断中的应用价值较高,且安全性高。
关键词:低剂量螺旋CT;常规剂量;早期肺癌
中图分类号:R445.3;R734.2 文献标识码:BDOI:10?郾3969/j.issn.1001-0270.2020.04.16
Value of Low-dose Spiral CT Scanning in the Diagnosis of Early Lung Cancer
YANG Jin-han
(Guiping City Peoples Hospital, Guangxi 537200, China)
Abstract: Objective: To investigate the value of low-dose spiral CT scanning in the diagnosis of early lung cancer. Methods: From March 2016 to March 2018, 65 patients with early lung cancer were selected. All of them were scanned with low-dose and conventional dose of spiral CT. The tumor shape and radiation dose of the were observed. Results: There was no significant difference(P>0.05)in the accuracy rate of early lung cancer between conventional dose CT(96.92%) and low-dose CT(93.85%); there was no significant difference(P>0.05) between low-dose CT and conventional dose in the detection rate of vascular cluster sign, lobulation sign and vacuole sign of burr sign; the maximum effective radiation dose and CTDIwand DLP were less than the conventional dose, the difference was significant(P<0.05). Conclusion: Low-dose spiral CT scanning is high value and safety in the diagnosis of early lung cancer.
Key Words: Low-dose Spiral CT; Conventional Dose; Early Lung Cancer
近些年来,CT扫描技术得到了较为广泛地使用,对于早期肺癌检查具有较高准确率,但大剂量CT检查往往会因辐射过高而导致患者受到损害,由此临床日益关注低剂量CT扫描技术的应用效果[1]。本文选取65例早期肺癌患者,探讨低剂量螺旋CT扫描的应用价值。报告如下。
1 资料与方法
1.1 一般资料
选取2016年3月-2018年3月65例早期肺癌患者,均经组织病理学确诊。患者中男40例,女25例;年龄45-78岁,均值(59.56±1.26)岁;体重45.78-80.65kg,均值(64.63±1.85)kg。
1.2 方法
患者均在检查前将胸前所佩戴的装饰物品摘下,保持均匀呼吸,使得吸气深浅相同。患者均采取16排螺旋CT进行检查。由胸口到肺底实施扫描。将肺窗、纵隔窗位作为观察窗口。肺窗窗宽1500HU,窗位700HU-600HU;纵隔窗宽350HU,窗位25HU-35HU。低剂量扫描管电压120kV,管电流30mAs,扫描层厚5mm,层间距5mm,重建层厚1.0-1.25,扫描时间10-14s。常规剂量扫描管电流200mAs,其余参数与低剂量一致。扫描图像在传输时,通过“剂量报告”功能来记录剂量长度乘积(DLP)、容积CT加权指数(CTDIvol)、最大有效辐射剂量。……p>
