Abstract
Objectives
To determine if golden-angle radial sparse parallel (GRASP) dynamic contrast-enhanced (DCE)-MRI allows simultaneous evaluation of perfusion and morphology in liver fibrosis.
Methods
Participants who were scheduled for liver biopsy or resection were enrolled (NCT02480972). Images were reconstructed at 12-s temporal resolution for morphologic assessment and at 3.3-s temporal resolution for quantitative evaluation. The image quality of the morphologic images was assessed on a four-point scale, and the Liver Imaging Reporting and Data System score was recorded for hepatic observations. Comparisons were made between quantitative parameters of DCE-MRI for the different fibrosis stages, and for hepatocellular carcinoma (HCCs) with different LR features.
Results
DCE-MRI of 64 participants (male = 48) were analyzed. The overall image quality consistently stood at 3.5 ± 0.4 to 3.7 ± 0.4 throughout the exam. Portal blood flow significantly decreased in participants with F2–F3 (n = 18, 175 ± 110 mL/100 mL/min) and F4 (n = 12, 98 ± 47 mL/100 mL/min) compared with those in participants with F0–F1 (n = 34, 283 ± 178 mL/100 mL/min, p < 0.05 for all). In participants with F4, the arterial fraction and extracellular volume were significantly higher than those in participants with F0–F1 and F2–F3 (p < 0.05). Compared with HCCs showing non-LR-M features (n = 16), HCCs with LR-M (n = 5) had a significantly prolonged mean transit time and lower arterial blood flow (p < 0.05).
Conclusions
Liver MRI using GRASP obtains both sufficient spatial resolution for confident diagnosis and high temporal resolution for pharmacokinetic modeling. Significant differences were found between the MRI-derived portal blood flow at different hepatic fibrosis stages.
Key Points
-
A single MRI examination is able to provide both images with sufficient spatial resolution for anatomic evaluation and those with high temporal resolution for pharmacokinetic modeling.
-
Portal blood flow was significantly lower in clinically significant hepatic fibrosis and mean transit time and extracellular volume increased in cirrhosis, compared with those in no or mild hepatic fibrosis.
-
HCCs with different LR features showed different quantitative parameters of DCE-MRI: longer mean transit time and lower arterial flow were observed in HCCs with LR-M features.
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Abbreviations
- AF:
-
Arterial fraction
- AIF:
-
Arterial input function
- AUC:
-
Area under the curve
- DCE:
-
Dynamic contrast-enhanced
- ECV:
-
Extracellular volume
- GRASP:
-
Golden-angle radial sparse parallel
- HCC:
-
Hepatocellular carcinoma
- ICC:
-
Intraclass correlation coefficient
- LI-RADS:
-
Liver Imaging Reporting and Data System
- LOA:
-
Limit of agreement
- MRI:
-
Magnetic resonance imaging
- MTT:
-
Mean transit time
- T1WI:
-
T1-weighted image
- VIF:
-
Venous input function
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Acknowledgements
We thank Benjamin Latimer, BA, for his editorial assistance.
Funding
This study was supported by Basic Science Research Program through the National Research Foundation of Korea funded by the Ministry of Education (2013R1A1A2A10066037).
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The scientific guarantor of this publication is Professor Jeong Min Lee.
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Two authors (R. Grimm and Y. Son) are employees of Siemens Healthineers. Otherwise, the authors of this manuscript declare no relationships with any companies whose products or services may be related to the subject matter of the article.
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• cross-sectional study
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Yoon, J.H., Lee, J.M., Yu, M.H. et al. Simultaneous evaluation of perfusion and morphology using GRASP MRI in hepatic fibrosis. Eur Radiol 32, 34–45 (2022). https://doi.org/10.1007/s00330-021-08087-2
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DOI: https://doi.org/10.1007/s00330-021-08087-2