CAJ | 학술논문

目的探讨婴幼儿(≤2周岁)髋关节正位片低剂量X线检查的防护价值。方法采用数字摄影DR成像技术,选择100例小儿髋关节正位片X线检查者用20.0 mAs和5.0 mAs随机分成两组进行放射检查,管电压77kV,采用自定标准盲式评估方法对两组曝光剂量下的图像质量进行评估,并对曝光剂量和曝光时间进行对比。结果检查 mAs 从20.0降至5.0时,平均曝光剂量由原来的14.6738 dGycm2降至3.6812 dGycm2,下降幅度为74.91%；平均曝光时间由原来的23.6ms降至5.92ms,下降幅度为74.16%。选择5.0 mAs进行检查时图像噪声略有增大,但检查的图像质量能达到医学影像诊断要求,差异有显著性(P<0.05)。结论以5.0 mAs检查的图像质量完全能满足临床与影像诊断的要求,同时大大降低了婴幼儿髋关节正位片X线检查的辐射剂量。
목적탐토영유인(≤2주세)관관절정위편저제량X선검사적방호개치。방법채용수자섭영DR성상기술,선택100례소인관관절정위편X선검사자용20.0 mAs화5.0 mAs수궤분성량조진행방사검사,관전압77kV,채용자정표준맹식평고방법대량조폭광제량하적도상질량진행평고,병대폭광제량화폭광시간진행대비。결과검사 mAs 종20.0강지5.0시,평균폭광제량유원래적14.6738 dGycm2강지3.6812 dGycm2,하강폭도위74.91%；평균폭광시간유원래적23.6ms강지5.92ms,하강폭도위74.16%。선택5.0 mAs진행검사시도상조성략유증대,단검사적도상질량능체도의학영상진단요구,차이유현저성(P<0.05)。결론이5.0 mAs검사적도상질량완전능만족림상여영상진단적요구,동시대대강저료영유인관관절정위편X선검사적복사제량。
Objective The purpose of this article is to explore the protective value of low-dose X-ray examination in the infants (≤2 years old ) hips by using antero-posterior film . Method Digital radiography was employed to ac-quiring the antero-posterior images in selected 100 pediatric coxae. All children were randomly divided into two groups for photography according to the use of tube current of 20 mAs and 5. 0 mAs. The scanning parameter of tube voltage is 77kV. The home-made scoring standard anddouble-blind method were used to assess the images quality in both groups,as well as the exposure dose were calculated for comparison. Result With the mAs of photography drop-ping from 20 mAs to 5 mAs, the average exposure dose decreased 74. 91% (from 14. 6738 dGycm2 to 3. 6812 dGy-cm2), the mean exposure time also decreased 74. 16% (from 23. 6ms down 5. 92ms ). The noise of 5. 0 mAs ima-ges are slightly increased, but the qualities of photographic images were assessed by two experienced radiologists and achieve the requirements of medical image diagnosis(P<0. 05). Conclusion The image quality scanned by 5. 0 mAs can meet the requirements of clinical diagnosis, meanwhile, greatly reduced the radiation dose for infants and young children.