Deep Learning-Based Assessment of Functional Liver Capacity Using Gadoxetic Acid-Enhanced Hepatobiliary Phase MRI

Hyo Jung Park, Jee Seok Yoon, Seung Soo Lee, Heung Il Suk, Bumwoo Park, Yu Sub Sung, Seung Baek Hong, Hwaseong Ryu

Research output: Contribution to journalArticlepeer-review

Abstract

Objective: We aimed to develop and test a deep learning algorithm (DLA) for fully automated measurement of the volume and signal intensity (SI) of the liver and spleen using gadoxetic acid-enhanced hepatobiliary phase (HBP)-magnetic resonance imaging (MRI) and to evaluate the clinical utility of DLA-assisted assessment of functional liver capacity. Materials and Methods: The DLA was developed using HBP-MRI data from 1014 patients. Using an independent test dataset (110 internal and 90 external MRI data), the segmentation performance of the DLA was measured using the Dice similarity score (DSS), and the agreement between the DLA and the ground truth for the volume and SI measurements was assessed with a Bland-Altman 95% limit of agreement (LOA). In 276 separate patients (male:female, 191:85; mean age ± standard deviation, 40 ± 15 years) who underwent hepatic resection, we evaluated the correlations between various DLA-based MRI indices, including liver volume normalized by body surface area (LVBSA), liver-to-spleen SI ratio (LSSR), MRI parameter-adjusted LSSR (aLSSR), LSSR x LVBSA, and aLSSR x LVBSA, and the indocyanine green retention rate at 15 minutes (ICG-R15), and determined the diagnostic performance of the DLA-based MRI indices to detect ICG-R15 ≥ 20%. Results: In the test dataset, the mean DSS was 0.977 for liver segmentation and 0.946 for spleen segmentation. The Bland-Altman 95% LOAs were 0.08% ± 3.70% for the liver volume, 0.20% ± 7.89% for the spleen volume,-0.02% ± 1.28% for the liver SI, and-0.01% ± 1.70% for the spleen SI. Among DLA-based MRI indices, aLSSR x LVBSA showed the strongest correlation with ICG-R15 (r =-0.54, p < 0.001), with area under receiver operating characteristic curve of 0.932 (95% confidence interval, 0.895–0.959) to diagnose ICG-R15 ≥ 20%. Conclusion: Our DLA can accurately measure the volume and SI of the liver and spleen and may be useful for assessing functional liver capacity using gadoxetic acid-enhanced HBP-MRI.

Original languageEnglish
Pages (from-to)720-731
Number of pages12
JournalKorean journal of radiology
Volume23
Issue number7
DOIs
Publication statusPublished - 2022 Jul

Keywords

  • Deep learning
  • Gadoxetic acid
  • Liver
  • Magnetic resonance imaging
  • Volumetry

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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