中国循证心血管医学杂志
中國循證心血管醫學雜誌
중국순증심혈관의학잡지
CHINESE JOURNAL OF EVIDENCE-BASES CARDIOVASCULAR MEDICINE
2014年
3期
285-287
,共3页
胡刚%韩威%路军良%陈华%刘更槐%张志刚%周燕%冯萌%王丽%李红敏%王丽伟%吴新淮
鬍剛%韓威%路軍良%陳華%劉更槐%張誌剛%週燕%馮萌%王麗%李紅敏%王麗偉%吳新淮
호강%한위%로군량%진화%류경괴%장지강%주연%풍맹%왕려%리홍민%왕려위%오신회
体层摄影术,X线计算机%冠状动脉%辐射剂量%对比剂
體層攝影術,X線計算機%冠狀動脈%輻射劑量%對比劑
체층섭영술,X선계산궤%관상동맥%복사제량%대비제
Computed tomography%X-ray computer%Coronary artery%Radiation dose%Contrast medium
目的:探讨应用双低技术--低千伏(100 kV)技术联合低对比剂浓度在冠状动脉CT血管造影(CCTA)中的可行性。方法选取拟行冠状动脉CTA检查患者80例患者(体重指数≤26.0 kg/m2),随机分为A、B两组,A组(n=40)采用100kV,270 mg/ml威视派克对比剂及自适应迭代算法重建(ASiR),B组(n=40)采用120 kV,350 mg/ml欧乃派克对比剂及滤波反投影算法重建(FBP)。测量主动脉、皮下脂肪和竖脊肌的CT值和SD值,平均SD值计算为图像噪声。测量左冠状动脉前降支(LAD),左冠状动脉回旋支(LCX)和右冠状动脉(RCA)的CT值和SD值,并计算对比噪声比(CNR)。采用5分法对所有图像进行主观质量评分。记录CT剂量指数,并进行有效辐射剂量计算。结果A组患者平均碘用量比B组患者下降22.8%。两组患者LAD、LCX和RCA血管CT值、CNR值、图像噪声及图像质量主观评分,均无统计学差异(P均>0.05)。A组患者的有效辐射剂量明显低于B组患者,差异有统计学意义(P<0.05)。结论对于体重指数≤26的患者,低对比剂浓度和低千伏(100 kV)相对于常规扫面能够提供相似的图像质量,并减少对比剂的碘用量及有效辐射剂量。
目的:探討應用雙低技術--低韆伏(100 kV)技術聯閤低對比劑濃度在冠狀動脈CT血管造影(CCTA)中的可行性。方法選取擬行冠狀動脈CTA檢查患者80例患者(體重指數≤26.0 kg/m2),隨機分為A、B兩組,A組(n=40)採用100kV,270 mg/ml威視派剋對比劑及自適應迭代算法重建(ASiR),B組(n=40)採用120 kV,350 mg/ml歐迺派剋對比劑及濾波反投影算法重建(FBP)。測量主動脈、皮下脂肪和豎脊肌的CT值和SD值,平均SD值計算為圖像譟聲。測量左冠狀動脈前降支(LAD),左冠狀動脈迴鏇支(LCX)和右冠狀動脈(RCA)的CT值和SD值,併計算對比譟聲比(CNR)。採用5分法對所有圖像進行主觀質量評分。記錄CT劑量指數,併進行有效輻射劑量計算。結果A組患者平均碘用量比B組患者下降22.8%。兩組患者LAD、LCX和RCA血管CT值、CNR值、圖像譟聲及圖像質量主觀評分,均無統計學差異(P均>0.05)。A組患者的有效輻射劑量明顯低于B組患者,差異有統計學意義(P<0.05)。結論對于體重指數≤26的患者,低對比劑濃度和低韆伏(100 kV)相對于常規掃麵能夠提供相似的圖像質量,併減少對比劑的碘用量及有效輻射劑量。
목적:탐토응용쌍저기술--저천복(100 kV)기술연합저대비제농도재관상동맥CT혈관조영(CCTA)중적가행성。방법선취의행관상동맥CTA검사환자80례환자(체중지수≤26.0 kg/m2),수궤분위A、B량조,A조(n=40)채용100kV,270 mg/ml위시파극대비제급자괄응질대산법중건(ASiR),B조(n=40)채용120 kV,350 mg/ml구내파극대비제급려파반투영산법중건(FBP)。측량주동맥、피하지방화수척기적CT치화SD치,평균SD치계산위도상조성。측량좌관상동맥전강지(LAD),좌관상동맥회선지(LCX)화우관상동맥(RCA)적CT치화SD치,병계산대비조성비(CNR)。채용5분법대소유도상진행주관질량평분。기록CT제량지수,병진행유효복사제량계산。결과A조환자평균전용량비B조환자하강22.8%。량조환자LAD、LCX화RCA혈관CT치、CNR치、도상조성급도상질량주관평분,균무통계학차이(P균>0.05)。A조환자적유효복사제량명현저우B조환자,차이유통계학의의(P<0.05)。결론대우체중지수≤26적환자,저대비제농도화저천복(100 kV)상대우상규소면능구제공상사적도상질량,병감소대비제적전용량급유효복사제량。
Objective To discuss the feasibility of low kilovolt (100 kV) technique combining low concentration of contrast medium in coronary CT angiography (CCTA). Methods The patients (n=80, BMI≤26) with planed CCTA were chosen and randomly divided into group A and group (each n=40). Group A was given low-kV (100 kV) CCTA with Visipaque (270 mg/mL) and self-adaptive iterative reconstruction algorithm (ASiR), and group B, routine kV (120 kV) CCTA with Omnipaque (350 mg/mL) and filter back-projection algorithm (FBP). The CT values and SD values of aorta, subcutaneous fat and erector spine muscle were measured, and mean SD value was calculated as image noise. The CT values and SD values of left anterior descending artery (LAD), left circumflex (LCX) and right coronary artery (RCA) were measured, and contrast-to-noise ratio (CNR) was calculated. All images were given quality subjective scoring by using 5-score method. The CT dose index was recorded and effective radiation dose was calculated. Results The average iodine dosage decreased by 22.8%in group A compared with group B. The CT values, CNR values, image noise and image quality subjective scores of LAD, LCX and RCA had no statistical difference between 2 groups (all P>0.05). The effective radiation dose was significantly lower in group A than that in group B (P<0.05). Conclusion To the patients with BMI≤26, low concentration of contrast medium and low kilovolt CCTA can provide similar image quality, lower iodine dosage and lower effective radiation dose compared with conventional scanning.