CAJ | 학술논문

目的探讨32层螺旋CT低剂量扫描技术在儿童颞骨检查的临床应用价值.方法对50例临床怀疑颞骨病变的儿童行32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32层螺旋CT低剂量扫描与常规剂量扫描对显示颞骨的解剖结构及病变差异无统计学意义(P=0.391).低剂量CT扫描显示儿童颞骨扫描参数中CTDIvol为6.24 mGy、DLP为25.04 mGy·cm,常规剂量CTDIvol为12.48 mGy、DLP为50.07 mGy·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32层螺旋CT低剂量扫描对儿童颞骨的诊断结果与常规剂量差异无统计学意义,故32层螺旋CT低剂量扫描临床怀疑颞骨病变的患者,完全能替代常规剂量的32层螺旋CT扫描.
목적탐토32층라선CT저제량소묘기술재인동섭골검사적림상응용개치.방법대50례림상부의섭골병변적인동행32층라선CT저제량화상규제량소묘,장기수궤분위량조,대비량충제량소묘적도상질량여환자적복사제량.결과32층라선CT저제량소묘여상규제량소묘대현시섭골적해부결구급병변차이무통계학의의(P=0.391).저제량CT소묘현시인동섭골소묘삼수중CTDIvol위6.24 mGy、DLP위25.04 mGy·cm,상규제량CTDIvol위12.48 mGy、DLP위50.07 mGy·cm.저제량여상규제량상비,기CTDIvol화DLP강저료약50%적복사제량.결론32층라선CT저제량소묘대인동섭골적진단결과여상규제량차이무통계학의의,고32층라선CT저제량소묘림상부의섭골병변적환자,완전능체대상규제량적32층라선CT소묘.
@@@@ Objective To investigate the clinical application value of low-dose of 32 slices helical CT scanning technology in the temporal bone of children. Methods Fifty cases of children with temporal bone of low-dose and conventional-dose 32 slices helical CT scanning, contrast two- dose scanning in patients with image quality and radiation dose. Results The display of the anatomical structure of the temporal bone showed no significance between low-dose CT scanning and conventional-dose CT scanning(P=0.391). The CTDIvol of low-dose CT scanning was 6.24 mGy, and DLP was 25.04 mGy·cm, and the CTDIvol of conventional doses was 12.48 mGy, DLP was 50.07 mGy·cm. The CTDIvol and DLP of low-dose CT scanning decreased half than conventional doses. Conclusion The low-dose CT scanning showing the lesions and qualitative diagnosis with conventional doses are no signigicantly difference, and the low-dose helical CT scanning in temporal bone of children can substitute for conventional-dose helical CT scanning.