CAJ | 학술논문

目的：探讨不同辐射剂量行颅脑CT扫描对影像质量的影响。方法：8例正常男性志愿者用110～140kV，180～360mAs分四组行轴位平扫；各影像按颗粒均匀性、脑灰白质细节、界面清晰度和有无射线硬化等积分评定质量。结果：共扫描192次，120kV、240mAs以上组影像质量均达优良；130kV、300mAs以上组优片率更高。结论：采用适当辐射剂量(＞120kV、240mAs)行颅脑CT扫描能提高密度分辨力，增加SNR，改善影像质量。
목적：탐토불동복사제량행로뇌CT소묘대영상질량적영향。방법：8례정상남성지원자용110～140kV，180～360mAs분사조행축위평소；각영상안과립균균성、뇌회백질세절、계면청석도화유무사선경화등적분평정질량。결과：공소묘192차，120kV、240mAs이상조영상질량균체우량；130kV、300mAs이상조우편솔경고。결론：채용괄당복사제량(＞120kV、240mAs)행로뇌CT소묘능제고밀도분변력，증가SNR，개선영상질량。
Objective: To evaluate the effect of different radiation doses to imaging quality in the course of plain cranial CT scans.Methods:Eight normal male volunteers were divided into four groups,and each group was performed plain cranial axial CT scans with 110,120,130,140kV and 180 ～ 360mAs respectively. All images were scored at four degrees (excellent, good, poor, very poor) according to grain homogeneity, fine structure appearance of the grey and white matter, hardening of X rays and clearness of tissue interface. Results:The patients were totally scanned 192 times. The image quality with ＞ 120kV and ＞ 240mAs is excellent or good. The rate of superior image quality with ≥ 130kV and≥300mAs, moreover, was higher. Conclusion:Using radiation dose with ＞ 120kV and ＞ 240mAs, the density resolution and SNR may be increased and imaging quality be improved.