Feasibility of A Novel Non-contrast Enhanced MR Angiography for Hepatic Portal Vein Imaging

doi:10.7517/issn.1674-0475.231013

Abstract

Abstract: This study explored the feasibility of using relaxation-enhanced MR angiography without contrast and triggering (REACT) for imaging the hepatic portal vein, and to explore. Prospective study of 22 healthy volunteers who underwent upper abdominal imaging with balance turbo field echo (BTFE) and REACT sequences. The overall image quality score, the ratio of minimum to maximum signal intensity (RSI), signal to noise ratio (SNR) and contrast to noise ratio (CNR) of the main hepatic portal vein, right portal vein and left portal vein were compared between the BTFE group and the REACT group. Paired t-test or paired rank sum test was used to analyze the differences in RSI, SNR, and CNR between the two groups, and Kappa test was used 16to evaluate the consistency of image quality scores. The results showed the average score of overall image quality of hepatic portal vein in REACT group (3.86) was slightly higher than that in BTFE group (3.2), and the difference between the two groups was statistically significant (Z=－4.6, P<0.05). The RSI of hepatic portal vein in BTFE group (0.81) was slightly higher than that in REACT group (0.76). The SNR and CNR of hepatic portal vein trunk, left and right branches in REACT group were significantly higher than those in BTFE group, and the differences between the two groups were statistically significant (Z value －4.57-－3.82, P<0.05). Therefore, the image quality of REACT sequence is a little better than that of BTFE sequence in non-contrast enhanced portal vein angiography. In addition, the use of water-fat separation technology (Dixon) to suppress fat in the REACT sequence can obtain a cleaner background signal, and the imaging display of hepatic portal vein is clearer.

Key words: hepatic portal vein angiography, non-contrast enhancement magnetic resonance angiography, balance turbo field echo, relaxation-enhanced MR angiography without contrast and triggering, magnetic resonance imaging

ZHONG Zhiming, PAN Hui, BAN Tongxing, LIU Ranshen, CHEN Peng, JIANG Jieying. Feasibility of A Novel Non-contrast Enhanced MR Angiography for Hepatic Portal Vein Imaging[J]. IMAGING SCIENCE AND PHOTOCHEMISTRY, 2024, 42(1): 16-22.

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