CAJ | 학술논문

目的：在3.0T高场强MR成像仪上，探讨流入反转恢复标记脉冲带与三维稳态采集快速成像序列相结合选择性地显示肝脏门静脉的方法，并对扫描参数进行优化。资料与方法对10名健康志愿者分别进行反转时间（TI）为1200、1400、1600、1800 ms扫描，比较不同TI下肝脏门静脉主干、左支、右支与肝实质的相对信号强度。结果10名志愿者均成功实现了非对比剂肝门静脉血管成像。TI由1200~1600 ms，门静脉远端分支的信号强度逐渐增强。在TI=1400 ms时，肝门静脉血管与肝实质之间的相对信号强度最高。结论3.0T MRI可以实现非对比剂肝门静脉血管成像，TI为1400 ms时成像效果较好。
목적：재3.0T고장강MR성상의상，탐토류입반전회복표기맥충대여삼유은태채집쾌속성상서렬상결합선택성지현시간장문정맥적방법，병대소묘삼수진행우화。자료여방법대10명건강지원자분별진행반전시간（TI）위1200、1400、1600、1800 ms소묘，비교불동TI하간장문정맥주간、좌지、우지여간실질적상대신호강도。결과10명지원자균성공실현료비대비제간문정맥혈관성상。TI유1200~1600 ms，문정맥원단분지적신호강도축점증강。재TI=1400 ms시，간문정맥혈관여간실질지간적상대신호강도최고。결론3.0T MRI가이실현비대비제간문정맥혈관성상，TI위1400 ms시성상효과교호。
Purpose To explore the methods of selectively visualizing hepatic portal vein by using three-dimensional fast imaging employing steady state acquisition combined with in-flow inversion recovery labeling pulse at 3.0 Tesla. Materials and Methods Ten healthy volunteers were examined under different TI (1200, 1400, 1600, 1800 ms), and the vessel-to-liver contrast ratio of the main portal vein, right portal vein, and left portal vein were measured. Results Non-contrast-enhanced MRA images of portal vein were obtained successfully in all ten volunteers. The signal intensity of peripheral portal branches gradually increased when TI increased from 1200 ms to 1600 ms, and the highest vessel-to-liver contrast ratio occurred when TI was 1400 ms. Conclusion Non-contrast enhanced magnetic resonance angiography of the hepatic portal vein can be successfully achieved at 3.0T high field MRI. A fixed TI of 1400 ms is preferable.