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Obesity Surgery
Published in: Obesity Surgery 10/2020

01-10-2020 | Obesity | Original Contributions

The Clinical Value and Appropriateness Criteria of Upper Abdominal Magnetic Resonance Examinations in Patients Before and After Bariatric Surgery: a Study of 837 Images

Authors: Han Lv, Mengyi Li, Yang Liu, Lei Zhao, Jing Sun, Di Cao, Na Zeng, Jia Liu, Yawen Liu, Shibo Bian, Peng Zhang, Zhenghan Yang, Zhongtao Zhang, Zhenchang Wang

Published in: Obesity Surgery | Issue 10/2020

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Abstract

Purpose

The abdominal magnetic resonance (MR) examinations have been increasingly applied in patients with obesity. However, few studies analyzed the appropriateness of this examination. This study is aimed to evaluate the feasibility and clinical value of upper abdominal MR in quantification of visceral/subcutaneous adipose tissue (VAT/SAT) and liver fat fraction (LFF) in patients before and after bariatric surgery.

Methods

All patients who underwent bariatric surgery from November 2017 to November 2019 in the prospectively maintained, IRB-approved database of our institution were queried. The images of all MR studies were retrospectively reviewed and analyzed.

Results

In total, 570 patients with 837 upper abdominal MR examinations were analyzed. The VAT/SAT can be clearly visualized and quantified on fat liver acquisition with volume acceleration-flexible (LAVA-Flex) sequence. The present rate of a single axial slice at the level of the L1–L2 intervertebral disc was 93.1% (779/837). The LFF could be quantitatively evaluated on all of the proton density fat fraction (PDFF) maps (100%, 837/837). Occasional findings may include cholelithiasis, cysts, hepatic hemangioma, and renal angiomyolipoma, which can be clearly diagnosed by MR.

Conclusion

The upper abdominal MR is featured by well feasibility and clear clinical value when applying in patients with obesity. We can use the results to do clinical research and evaluate obesity-related disease risks before and after surgery, thus providing suggestions to choose the type of surgery for patients with different risk levels in the future. MR scanning including fat LAVA-Flex images with the inclusion of L1–L2 level and PDFF measurements is suggested for the VAT/SAT/LFF quantification.

Trial Registration

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Metadata
Title
The Clinical Value and Appropriateness Criteria of Upper Abdominal Magnetic Resonance Examinations in Patients Before and After Bariatric Surgery: a Study of 837 Images
Authors
Han Lv
Mengyi Li
Yang Liu
Lei Zhao
Jing Sun
Di Cao
Na Zeng
Jia Liu
Yawen Liu
Shibo Bian
Peng Zhang
Zhenghan Yang
Zhongtao Zhang
Zhenchang Wang
Publication date
01-10-2020
Publisher
Springer US
Published in
Obesity Surgery / Issue 10/2020
Print ISSN: 0960-8923
Electronic ISSN: 1708-0428
DOI
https://doi.org/10.1007/s11695-020-04688-w

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