儿童气管性支气管微剂量MSCT诊断及分型研究

目的:探讨儿童气管性支气管微剂量MSCT应用价值。方法:搜集近3年儿童气管性支气管528例,对5个年龄段的低剂量组、微剂量组和微剂量联合迭代重建技术组的有效辐射剂量进行对比分析,并通过后处理技术获得支气管树的重建图像观察诊断效能。结果:不同年龄段的三组图像质量评价两两比较,差异无统计学意义(P> 0.05),而对三组患儿所受有效辐射剂量进行两两比较,除10～14岁年龄段低剂量组与微剂量组差异无统计学意义(P> 0.05)外,其余年龄段差异均有统计学意义(P <0.05);在儿童气管性支气管新分3型中:Ⅰ型356例(占67.4%),其中ⅠA型198例(37.5%),ⅠB型158例(29.9%);Ⅱ型172例(32.6%)。结论:微剂量MSCT联合迭代重建技术在儿童气管性支气管诊断中明显降低了患儿的有效辐射剂量,具有较高的应用价值;有效分型对儿科临床治疗有一定的特异性指导作用。

Study on the Diagnosis and Classification of Tracheobronchial Micro Dose MSCT in Children

Objective:To explore the value of MSCT in children's tracheobronchial microdose. Methods:528 children with tracheobronchial bronchi in recent 3 years were collected. The effective radiation doses of 5 age groups, including low dose group, micro dose group and micro dose combined iterative reconstruction technology group, were compared and analyzed, and the reconstruction image of bronchial tree was obtained by post-processing technology to observe the diagnostic effect. Results:there was no significant difference in image quality evaluation between the three groups in different age groups(P>0.05), except for the difference between the low-dose group and the microdose group in the age group of 10-14 years old(P>0.05), there was significant difference in effective radiation dose in other age groups(P<0.05). There were 356 cases(67.4%) of type Ⅰ, 198 cases(37.5%) of type Ⅰ A, 158 cases(29.9%) of type Ⅰ B and 172 cases(32.6%) of type Ⅱ. Conclusion:Micro dose MSCT combined with iterative reconstruction technology can significantly reduce the effective radiation dose in the diagnosis of children's tracheobronchial bronchi, which has a high application value; effective typing has a certain specific guiding role in the clinical treatment of Pediatrics.