Non-Contrast-Enhanced MR Angiography for Selective Visualization of the Hepatic Vein and Inferior Vena Cava With True Steady-State Free-Precession Sequence and Time-Spatial Labeling Inversion Pulses: Preliminary Results
Non-Contrast-Enhanced MR Angiography for Selective Visualization of the Hepatic Vein and Inferior Vena Cava With True Steady-State Free-Precession Sequence and Time-Spatial Labeling Inversion Pulses: Preliminary Results
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DOI：
10.1002/jmri.21636
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发表时间：
2009-02-01
影响因子：
4.4
通讯作者：
Togashi, Kaori
中科院分区：
文献类型：
--
作者：
Shimada, Kotaro;Isoda, Hiroyoshi;Togashi, Kaori
目的：目的：应用三维真稳态自由旋进（SSFP）T-SLIP MR血管成像技术，选择性显示肝静脉和下腔静脉（IVC），并优化采集方案。材料与方法：在23名受试者中结合两种不同的T-SLIP进行了呼吸门控3D真实SSFP扫描（一个放置在胸部以抑制动脉信号，另一个放置在腹部以抑制门静脉信号）。其中一个最重要的因素是腹部T-SLIP的反转时间（TI），并在800，1200，1600和2000毫秒的四个不同TI的图像质量进行了评价的相对信噪比（SNR），对比噪声比（CNR），平均可视化scores.Results：没有观察到的SNR和CNR之间的每个TI的显着差异。然而，IVC可视化评分在TI为1600和2000 msec时更好，总体图像质量在TI为1200和1600 msec时更好。因此。TI为1600毫秒被认为是IVC可视化和门静脉信号抑制之间的最佳平衡，在我们的protocol.Conclusion：真正的SSFP扫描与T-SLIPs使选择性可视化肝静脉和IVC没有外源性造影剂。
Purpose: To selectively visualize the hepatic vein and inferior vena cava (IVC) using three-dimensional (3D) true steady-state free-precession (SSFP) MR angiography with time-spatial labeling inversion pulse (T-SLIP), and to optimize the acquisition protocol.Materials and Methods: Respiratory-gated 3D true SSFP scans were conducted in 23 subjects in combination with two different T-SLIPs (one placed in the thorax to suppress the arterial signal and the other in the abdomen to suppress the portal venous signal). One of the most important factors was the inversion time (TI) of abdominal T-SLIP, and the image quality was evaluated at four different TIs of 800, 1200, 1600, and 2000 msec in terms of relative signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR), and mean visualization scores.Results: No significant difference was observed in SNR and CNR between each TI. However, IVC visualization scores were better at TIs of 1600 and 2000 msec, and overall image quality was better at TIs of 1200 and 1600 msec. Therefore. the TI of 1600 msec was considered to provide the optimal balance between IVC visualization and signal suppression of the portal vein in our protocol.Conclusion: True SSFP scan with T-SLIPs enabled selective visualization of the hepatic vein and IVC without an exogenous contrast agent.