多排螺旋CT薄层重组和高分辨率CT靶扫对肺微小结节的价值比较

发布时间：2018-03-08 13:46

本文选题：肺微小结节　切入点：体层摄影术　出处：《临床放射学杂志》2017年11期 　论文类型：期刊论文

【摘要】：目的评价多排螺旋CT(MSCT)薄层重组和高分辨率CT(HRCT)靶扫对肺微小结节(10 mm)的显示效果和辐射剂量。方法回顾性分析100例微小肺结节MSCT薄层重组和HRCT靶扫的CT表现,包括结节的大小、密度、内部结构(空泡、钙化)、形态(边缘、"分叶"征、"毛刺"征)、伴随征象(支气管、血管、胸膜改变)。评价两种方法对上述征象的显示效果,并对辐射剂量进行比较。结果 MSCT薄层重组能准确地显示肺微小结节的密度、边缘、空泡、钙化、"分叶"、"毛刺"、胸膜改变,和HRCT靶扫有良好的一致性。两种方法对结节的均匀度、肿瘤微血管征、结节与小支气管关系的检出差异具有统计学意义(P0.05)。MSCT薄层重组对均匀度倾向于更"均匀",肿瘤微血管征分型偏低,微血管的数量偏少。MSCT薄层重组容积CT剂量指数(CTDIvol)低于HRCT靶扫,两者之比约1∶2,重组剂量长度乘积(DLP)和有效剂量高于HRCT靶扫,两者之比约2∶1。结论 MSCT薄层重组可准确判断微小结节的多数征象,和HRCT靶扫有良好的一致性,避免再次HRCT扫描可有效降低辐射剂量。HRCT靶扫对结节的均匀度、肿瘤微血管征分型及血管数量、结节与小支气管关系的显示优于MSCT薄层重组。
[Abstract]:Objective to evaluate the display effect and radiation dose of multislice spiral CTT (MSCT) thin slice recombination and high resolution CTHRCT (10 mm) for pulmonary micronodules. Methods the CT findings of MSCT thin layer recombination and HRCT target imaging in 100 cases of pulmonary micronodules were retrospectively analyzed, including the size of the nodules. Density, internal structure (vacuole, calcification, shape) (edge, lobular sign, "burr" sign, accompanying sign (bronchus, blood vessel, pleural change). Results the density, margin, vacuole, calcification, lobulation, burr, pleural changes of pulmonary micronodules could be accurately demonstrated by MSCT thin layer recombination. There was good agreement with HRCT target scan. The two methods were applied to the uniformity of nodules, tumor microvessel sign, The difference of the relationship between nodules and bronchioles was statistically significant. The TLC recombination of MSCT tended to be more "homogeneous" for uniformity, the microvessel sign was lower and the number of microvessels was lower. CTDIvoll was lower than that of HRCT. The ratio of the two is about 1: 2, the product of recombination dose length and the effective dose are higher than that of HRCT target scan, and the ratio of them is about 2: 1.Conclusion Thin-layer recombination of MSCT can accurately judge most signs of small nodules, and has good agreement with HRCT target scan. Avoiding repeated HRCT scan can effectively reduce the radiation dose. HRCT target scan on the uniformity of nodules, tumor microvessel type and the number of vessels, the relationship between nodules and bronchioles is better than MSCT thin layer reorganization.
【作者单位】：苏州大学附属第一医院影像科;苏州市立医院东区放射科;苏州市立医院东区呼吸科;
【基金】：苏州市临床重点病种诊疗技术专项项目(编号:LCZX201501) 苏州市应用基础研究计划基金(编号:SYSD2014113) 苏州市民生科技关键技术应用研究基金(编号:SS201653)
【分类号】：R730.44;R734.2

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