CAJ | 학술논문

目的：探讨MSCT齿科扫描计划中CT低剂量扫描临床应用的可行性。方法：管电流分为250 mAs常规剂量组及100 mAs低剂量组、50 mAs低剂量组。45例受检者运用随机数字表法分成3组，每组各15例，分别行MSCT齿科扫描计划的常规剂量和低剂量扫描，对获得的图像由放射诊断副主任医师和主任医师各1名在保证图像能够满足诊断的前提下分别进行质量评价，对意见不一致者两人协商确定。结果：MSCT齿科CT低剂量扫描所得图像质量与常规剂量扫描差异无统计学意义（ P＞0．05）。与常规剂量组相比，低剂量组患者实际接受的放射线剂量长度乘积（ dose length product，DLP）及有效剂量E下降，差异有统计学意义。结论：MSCT齿科CT低剂量扫描，能够保证口腔牙齿解剖结构细节显示，可以减少受检者的辐射损伤，临床具有一定的应用价值。
목적：탐토MSCT치과소묘계화중CT저제량소묘림상응용적가행성。방법：관전류분위250 mAs상규제량조급100 mAs저제량조、50 mAs저제량조。45례수검자운용수궤수자표법분성3조，매조각15례，분별행MSCT치과소묘계화적상규제량화저제량소묘，대획득적도상유방사진단부주임의사화주임의사각1명재보증도상능구만족진단적전제하분별진행질량평개，대의견불일치자량인협상학정。결과：MSCT치과CT저제량소묘소득도상질량여상규제량소묘차이무통계학의의（ P＞0．05）。여상규제량조상비，저제량조환자실제접수적방사선제량장도승적（ dose length product，DLP）급유효제량E하강，차이유통계학의의。결론：MSCT치과CT저제량소묘，능구보증구강아치해부결구세절현시，가이감소수검자적복사손상，림상구유일정적응용개치。
Objective:To assess the feasibility of applying low-dose multi-spiral computed tomography(MSCT) to dental scans.Methods:Forty-five pa-tients undergoing MSCT sans were allocated on random number table basis to three groups(n=15 for each),i.e.,standard unenhanced group(tube cur-rent:250 mAs) ,low-dose groups( tube current:100 mAs,50 mAs,respectively) .The images were viewed separately by two radiologists,and any disagree-ment was settled by discussion.Results:The image quality was not significant between the standard unenhanced group and the two low-dose groups( P>0.05).However,the dose-length product (DLP) and the effect dose were decreased for the patients in the two low-dose groups,which was statistically sig-nificant (P<0.05).Conclusion:Low-dose MSCT can clearly expose the anatomical configuration of the temporal bone and prevent the clients from radia-tion injury,which is of certain clinical implications.