摘要
目的:探讨16层螺旋CT低剂量扫描技术在儿童腺样体肥大的临床应用。方法:对46例临床疑似腺样体肥大儿童行16层螺旋CT低剂量和常规剂量扫描,将其随机分为两组,对比两种剂量扫描的图像质量与患者的辐射剂量。结果:16层螺旋CT低剂量扫描与常规剂量扫描对显示鼻咽部的解剖结构及病变差异无显著性意义(P=0.381)。对低剂量组/常规剂量组两组腺样体CT值平均值之间无统计学差异(P=0.256)。CT值标准偏差之间无统计学差异(P=0.313)。低剂量CT扫描显示儿童鼻咽部扫描参数中CTDIvol为4.35mGy、DLP为40.62mGy.cm,常规剂量CTDIvol为8.65mGy、DLP为81.23mGy.cm。低剂量与常规剂量相比,其CTDIvol和DLP降低了约50%的辐射剂量。结论:16层螺旋CT低剂量扫描对腺样体肥大的诊断结果与常规剂量均相同,故16层螺旋CT低剂量扫描临床疑似腺样体肥大的患者,完全能替代常规剂量的16层螺旋CT扫描。
Objective：To investigate clinical application value of low-dose 16-slice spiral CT scanning technology in the adenoidal hypertrophy of children. Methods：46 cases of children with adenoidal hypertrophy underwent low-dose （group A） and conventional-dose （group B） 16-slice spiral CT scanning. The image quality and radiation dose in two groups were compared. Results： The display of the anatomical structure of the nasopharynx and adenoidal hypertrophy showed no signifi- cant difference between low-dose CT scanning and conventional-dose CT scanning （P： 0. 381）. It showed no significant difference in the mean of CT values （P=0. 256） and the standard deviation of CT values （P：0. 313） between low-dose and conventional-dose scanning. The CTDIvol of low-dose CT scanning was 4. 35mGy, and DLP was40. 62mGy · cm, and the CTDIvol of conventional doses was 8.6StaGy, DLP was 81.23mGy. cm. The CTDIvol and DLP of low-dose CT scanning de- creased about 50% as compared with those of conventional dose scanning. Conclusion： The image quality of low dose CT scanning is the same as that of conventional dose scanning,and the low-dose spiral CT scanning in children with adenoidal hypertrophy can substitute the conventional-dose spiral CT scanning.
出处
《放射学实践》
2012年第6期672-674,共3页
Radiologic Practice
