CAJ | 학술논문

目的研究低剂量多层螺旋CT扫描在鼻咽部检查中的应用及其临床价值。方法将128例患者随机分为A、B、C、D四组各32例，分别行常规剂量250mA和低剂量100mA、50mA、30mA螺旋CT扫描，比较各组图像质量与受检者的辐射剂量。结果 B、C、D组容积CT剂量指数(CTDIvol)和剂量长度乘积(DLP)分别降低了64.16%、82.08%、89.24%；四组图像间有统计学差异，B、C两组图像质量可以满足临床诊疗需要，D组图像质量达不到诊断要求。结论120kV、50mA低剂量扫描既可保证鼻咽部图像的质量，又可明显降低受检者的辐射剂量。
목적연구저제량다층라선CT소묘재비인부검사중적응용급기림상개치。방법장128례환자수궤분위A、B、C、D사조각32례，분별행상규제량250mA화저제량100mA、50mA、30mA라선CT소묘，비교각조도상질량여수검자적복사제량。결과 B、C、D조용적CT제량지수(CTDIvol)화제량장도승적(DLP)분별강저료64.16%、82.08%、89.24%；사조도상간유통계학차이，B、C량조도상질량가이만족림상진료수요，D조도상질량체불도진단요구。결론120kV、50mA저제량소묘기가보증비인부도상적질량，우가명현강저수검자적복사제량。
Objective To study the low dose application of multislice CT scan in nasal pharyngeal and its clinical value. Methods 128 patients were randomly divided into A, B, C, D four groups, each group 32 cases, lines of conventional dose of 250mA and low doses of 100mA, 50mA, 30mA, spiral CT scan, comparing each image quality and radiation dose of the client. Results B, C, D group volume CT dose index(CTDIvol) and dose length product(DLP) was reduced by 64.16%, 82.08% and 64.16% respectively; Four groups was statistically difference between images, B and C image quality can meet the needs of the clinical diagnosis and treatment in both groups, group D image quality can not meet the diagnostic requirements. Conclusion 120kV, 50mA low-dose scan can not only ensure the quality of image of nose pharynx ministry, and can obviously reduce the radiation dose of client.