中华放射学杂志
中華放射學雜誌
중화방사학잡지
Chinese Journal of Radiology
2013年
4期
301-304
,共4页
李剑%宦怡%赵宏亮%王颖%刘莹%魏梦绮%石明国%郑敏文
李劍%宦怡%趙宏亮%王穎%劉瑩%魏夢綺%石明國%鄭敏文
리검%환이%조굉량%왕영%류형%위몽기%석명국%정민문
主动脉造影术%辐射剂量%体层摄影术,X线计算机%质量控制
主動脈造影術%輻射劑量%體層攝影術,X線計算機%質量控製
주동맥조영술%복사제량%체층섭영술,X선계산궤%질량공제
Aortography%Radiation dose%Tomography,X-ray computed%Quality control
目的 比较双源CT前瞻性心电门控大螺距扫描和非门控大螺距扫描在主动脉成像中的图像质量和辐射剂量.方法 连续搜集50例(A组)临床可疑主动脉夹层或者夹层术后的患者进行前瞻性心电门控大螺距扫描,再连续搜集50例(B组)进行非门控大螺距扫描.由2名有经验的医师对2组图像质量进行评分后计算均值,并记录测量值和辐射剂量.应用非参数检验和两独立样本的f检验比较2组患者的图像质量和辐射剂量.结果 2组患者的总体图像质量评分[A和B组分别为(1.18±0.40)和(1.23±0.31)分]差异无统计学意义(U=1.20,P=0.23).A组采用心电门控大螺距扫描模式的辐射剂量为(1.49 ±0.38)mSv,低于非门控大螺距扫描模式的(2.79±0.54) mSv,2组差异有统计学意义(t=13.677,P<0.05).结论 双源CT心电门控大螺距扫描以较低的辐射剂量获得清晰的主动脉图像,在不控制心率的情况下能提高右冠状动脉开口的显示,在低心率成像时图像质量明显优于非门控组.
目的 比較雙源CT前瞻性心電門控大螺距掃描和非門控大螺距掃描在主動脈成像中的圖像質量和輻射劑量.方法 連續搜集50例(A組)臨床可疑主動脈夾層或者夾層術後的患者進行前瞻性心電門控大螺距掃描,再連續搜集50例(B組)進行非門控大螺距掃描.由2名有經驗的醫師對2組圖像質量進行評分後計算均值,併記錄測量值和輻射劑量.應用非參數檢驗和兩獨立樣本的f檢驗比較2組患者的圖像質量和輻射劑量.結果 2組患者的總體圖像質量評分[A和B組分彆為(1.18±0.40)和(1.23±0.31)分]差異無統計學意義(U=1.20,P=0.23).A組採用心電門控大螺距掃描模式的輻射劑量為(1.49 ±0.38)mSv,低于非門控大螺距掃描模式的(2.79±0.54) mSv,2組差異有統計學意義(t=13.677,P<0.05).結論 雙源CT心電門控大螺距掃描以較低的輻射劑量穫得清晰的主動脈圖像,在不控製心率的情況下能提高右冠狀動脈開口的顯示,在低心率成像時圖像質量明顯優于非門控組.
목적 비교쌍원CT전첨성심전문공대라거소묘화비문공대라거소묘재주동맥성상중적도상질량화복사제량.방법 련속수집50례(A조)림상가의주동맥협층혹자협층술후적환자진행전첨성심전문공대라거소묘,재련속수집50례(B조)진행비문공대라거소묘.유2명유경험적의사대2조도상질량진행평분후계산균치,병기록측량치화복사제량.응용비삼수검험화량독립양본적f검험비교2조환자적도상질량화복사제량.결과 2조환자적총체도상질량평분[A화B조분별위(1.18±0.40)화(1.23±0.31)분]차이무통계학의의(U=1.20,P=0.23).A조채용심전문공대라거소묘모식적복사제량위(1.49 ±0.38)mSv,저우비문공대라거소묘모식적(2.79±0.54) mSv,2조차이유통계학의의(t=13.677,P<0.05).결론 쌍원CT심전문공대라거소묘이교저적복사제량획득청석적주동맥도상,재불공제심솔적정황하능제고우관상동맥개구적현시,재저심솔성상시도상질량명현우우비문공조.
Objective To evaluate the application of prospective ECG-gating Flash spiral scan mode dual-source CT in aortography,and compare it's image quality and radiation dose with without ECG-synchronization high-pitch spiral scanning mode.Methods Fifty consecutive patients (Group A) with suspected aortic dissection or after operations for the aortic dissection were scanned with prospective ECG-gated high-pitch scan and another 50 consecutive patients(Group B) were analyzed by non-ECG-gated high-pitch scan.Image quality of the aortic was assessed by two independent readers.Image noise was measured,radiation dose estimates were calculated.The imaging quality of the aortic and the radiation dose were compared with Mann-whitney U and t test.Results The average image quality score [(1.18 ± 0.40) in group A and (1.23 ±0.31) in group B] showed no significant difference between group A and group B(U =1.20,P =0.23).The mean radiation dose of group A was lower than that of group B [(1.49 ± 0.38) mSv in group A,(2.79 ± 0.54) mSv in group B,t =13.677,P < 0.05].Conclusion Prospective ECG-gated dualsource CT Flash spiral scanning with low radiation dose and good image quality in the aortic dissection with high value of clinical application.