E-ISSN 1305-3612
Abdominal Imaging - Original Article
Hyperintensity at fat spared area in steatotic liver on the hepatobiliary phase MRI
1 Department of Radiology, Hacettepe University School of Medicine, Ankara, Turkey  
Diagn Interv Radiol ; : -

Abstract

PURPOSE: To investigate the reasons for hyperintensity at fat spared area in steatotic liver at hepatobiliary phase (HBP) on Gd-EOB-DTPA-enhanced liver MRI.

 

METHODS: Twenty-two patients with focal fat spared area demonstrating hyperintensity on HBP images were included. A region of interest was placed on in-and-opposed-phase images at fat spared area and liver to measure the fat. The measurement was also performed on precontrast T1-weighted and HBP images. The signal intensities of spleen, kidney, muscle, intervertebral disc, and spinal cord were also recorded.

 

RESULTS: The mean fat fraction of liver and fat spared area was 24.86% (8-46%) and 8.41% (1-34%), respectively (P < 0.001). There was a significant and positive correlation between liver parenchyma fat fraction and delta fat fraction (r=0.74, P < 0.001). The mean signal intensity values of fat spared areas were higher compared to liver on precontrast T1-weighted and HBP images (P < 0.001). The mean relative enhancement ratio (RER) of liver and fat spared areas were 0.98 (0.05-1.90) and 1.15 (0.22-2.03), respectively (P < 0.001). However in 6 patients, the RER of liver and fat spared areas were almost equal. The uptake of GD-EOB at fat spared area was not correlated with degree of steatosis (r = -0.01, P = 0.95).

 

CONCLUSION: Fat spared area in steatotic liver appears hyperintense on HBP images due to increased RER and/or baseline hyperintensity on precontrast images.

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Copyright © 2019 Turkish Society of Radiology | Latest Update: 10.05.2019