低剂量容积数据高分辨率CT重组在肺部疾病中的应用价值

Application value of low-dose volumetric data with a high-resolution CT algorithm in lung diseases

目的:评价低剂量容积数据高分辨率CT重组图像在肺部疾病中的应用价值。方法:对50例肺部疾病患者进行低剂量多层螺旋CT(MSCT)、高分辨率CT(HRCT)扫描及容积数据HRCT重组,比较所得到的低剂量容积数据HRCT重组图像和HRCT扫描图像质量并进行分级评分。结果:50例肺部疾病患者的低剂量容积数据HRCT重组图像和HRCT扫描图像质量相同,两者差异无统计学意义(P=0.188)。所见征象评分P值均>0.05,肺实变、网状影、蜂窝影、肺气肿、肺大泡得分趋向一致。低剂量MSCT扫描降低80%辐射量,缩短扫描时间。结论:低剂量容积数据HRCT重组图像评价肺部疾病的价值与HRCT扫描图像相同。低剂量容积数据HRCT重组大大降低辐射量,明显缩短检查时间,复检患者尤其适用,可以替代HRCT扫描。

Objective：To evaluate the clinical application of low-dose thin-reconstruction of volumetric data with a high-resolution CT algorithm in lung diseases. Methods： Fifty patients who had been diagnosed with lung diseases underwent low-dose MSCT and HRCT scans and volumetric HRCT reconstructions. Conventional HRCT scans and volumetric HRCT images were rated for image quality and diagnostic value in lung diseases. Results： No difference was found in the identification of CT findings of lung diseases between conventional HRCT scans and volumetric HRCT images, P = 0. 188. Score values of conventional HRCT and volumetric HRCT techniques were equal nearly in the evaluation of CT findings with consolidation of lung, graticule, honeycomb, emphysema and bullae. Low-dose MSCT scan reduced 80% radiation dose and shortened the examination time. Conclusion： The present investigation confirms that low-dose volumetric HRCT images allow a diagnostic approach to lung diseases as precise as that provided with conventional HRCT scans. But low-dose volumetric HRCT reduced 80% radiation dose and shortened the examination time. It is useful especially for the patients who are looked over repeatedly.