CAJ | 학술논문

目的：评估CTA “双低”扫描模式（低电压联合低浓度对比剂）在头颈部血管成像中的临床价值。方法将临床怀疑头颈部血管病变、于本单位行CTA检查的70例患者随机分成A、B两组，每组35例。A组：100kV ，对比剂为碘克沙醇270mgI/ml ，B组：120kV ，对比剂为碘海醇350mgI/ml；所有患者对比剂用量均为0．9ml/kg体重，注射流率5ml/s ，使用智能跟踪触发扫描。由两名有经验的放射科医师采用三级评分法对所有CTA图像进行图像质量评估，并对照比较两组的碘摄入量、对比噪声比（CNR）以及有效辐射剂量（ED）。结果54例患者被确诊颈动脉粥样硬化（A组29例，B组25例），所有患者的颈动脉及其分支均可清晰显示，两组患者颈动脉强化程度及对比噪声比无统计学差异；A组患者的辐射剂量及碘摄入量低于B组（1．18±0．08）mSv vs（1．58±0．14）mSv ，P＜0．05；（15．87±4．10）gI vs （19．35±5．14）gI ，（ P＜0．05）。结论使用100kV和碘克沙醇270mgI/ml进行头颈部动脉CTA可获得与120kV、高浓度碘对比剂同样的图像质量，并能较大幅度降低碘摄入量及辐射剂量，具有较高的临床应用价值。
목적：평고CTA “쌍저”소묘모식（저전압연합저농도대비제）재두경부혈관성상중적림상개치。방법장림상부의두경부혈관병변、우본단위행CTA검사적70례환자수궤분성A、B량조，매조35례。A조：100kV ，대비제위전극사순270mgI/ml ，B조：120kV ，대비제위전해순350mgI/ml；소유환자대비제용량균위0．9ml/kg체중，주사류솔5ml/s ，사용지능근종촉발소묘。유량명유경험적방사과의사채용삼급평분법대소유CTA도상진행도상질량평고，병대조비교량조적전섭입량、대비조성비（CNR）이급유효복사제량（ED）。결과54례환자피학진경동맥죽양경화（A조29례，B조25례），소유환자적경동맥급기분지균가청석현시，량조환자경동맥강화정도급대비조성비무통계학차이；A조환자적복사제량급전섭입량저우B조（1．18±0．08）mSv vs（1．58±0．14）mSv ，P＜0．05；（15．87±4．10）gI vs （19．35±5．14）gI ，（ P＜0．05）。결론사용100kV화전극사순270mgI/ml진행두경부동맥CTA가획득여120kV、고농도전대비제동양적도상질량，병능교대폭도강저전섭입량급복사제량，구유교고적림상응용개치。
Objective The purpose of this study is to evaluate the image quality and the clinical value of low tube voltage and low concentration contrst media CT angiography protocol in head and neck arteries .Methods Seventy patients with clinically suspected head and neck vascular disease underwent CTA procedure were divided into group A and B ,with 35 patients in each group .The head and neck CTA was performed using 100 kV with Iodixanol 270 in group A ,120 kV with Iohexol 350 in group B .The CM volume of 0 .9 ml/kg was injected at a flow rate of 5 ml/s .Bolus tracking of AA was used to evaluate the circulation time and trigger the scan .Image quality was assessed by using a three-point grading scale . The Iodine intake ,contrast-to-noise ratio (CNR) ,and the effective dose (ED) were compared between the two groups . Results Carotid atherosclerosis was found in 54 patients (29 in group A ,25 in group B) .All the head and neck artery branches were clearly displayed in all the cases .Enhancement homogeneity and CNR were good with both contrast agents , with no statistically significant difference between them ( P>0 .05) .The ED and iodine intake was lower in group A than group B (1 .18 ± 0 .08) mSV vs (1 .58 ± 0 .14) mSv ,P<0 .05;(15 .87 ± 4 .10) gI vs (19 .35 ± 5 .14) gI ,P<0 .05) ,with statistical difference .Conclusion Head-and-neck CTA with 100 kV and iodixanol 270 can provide same quality images as using 100 kV and Iohexol 350 ,and reduce the ED and iodine intake greatly .