MRI Extracellular Volume Fraction in Liver Fibrosis-A Comparison of Different Time Points and Blood Pool Measurements.
extracellular space
inflammation
liver cirrhosis
liver diseases
Journal
Journal of magnetic resonance imaging : JMRI
ISSN: 1522-2586
Titre abrégé: J Magn Reson Imaging
Pays: United States
ID NLM: 9105850
Informations de publication
Date de publication:
29 Mar 2024
29 Mar 2024
Historique:
revised:
12
01
2024
received:
25
10
2023
accepted:
14
01
2024
medline:
30
3
2024
pubmed:
30
3
2024
entrez:
30
3
2024
Statut:
aheadofprint
Résumé
Extracellular volume (ECV) correlates with the degree of liver fibrosis. To analyze the performance of liver MRI-based ECV evaluations with different blood pool measurements at different time points. Prospective. 73 consecutive patients (n = 31 females, mean age 56 years) with histopathology-proven liver fibrosis. 3T acquisition within 90 days of biopsy, including shortened modified look-locker inversion recovery T1 mapping. Polygonal regions of interest were manually drawn in the liver, aorta, vena cava, and in the main, left and right portal vein on four slices before and after Gd-DOTA administration at 5/10/15 minutes. ECV was calculated 1) on one single slice on portal bifurcation level, and 2) averaged over all four slices. Parameters were compared between patients with fibrosis grades F0-2 and F3-F4 with the Mann-Whitney U and fishers exact test. ROC analysis was used to assess the performance of the parameters to predict F3-4 fibrosis. A P-value <0.05 was considered statistically significant. ECV was significantly higher in F3-4 fibrosis (35.4% [33.1%-37.6%], 36.1% [34.2%-37.5%], and 37.0% [34.8%-39.2%] at 5/10/15 minutes) than in patients with F0-2 fibrosis (33.3% [30.8%-34.8%], 33.7% [31.6%-34.7%] and 34.9% [32.2%-36.0%]; AUC = 0.72-0.75). Blood pool T1 relaxation times in the aorta and vena cava were longer on the upper vs. lower slices at 5 minutes, but not at 10/15 minutes. AUC values were similar when measured on a single slice (AUC = 0.69-0.72) or based on blood pool measurements in the cava or portal vein (AUC = 0.63-0.67 and AUC = 0.65-0.70). Liver ECV is significantly higher in F3-4 fibrosis compared to F0-2 fibrosis with blood pool measurements performed in the aorta, inferior vena cava, and portal vein at 5, 10, and 15 minutes. However, a smaller variability was observed for blood pool measurements between slices at 15 minutes. 1 TECHNICAL EFFICACY: Stage 3.
Sections du résumé
BACKGROUND
BACKGROUND
Extracellular volume (ECV) correlates with the degree of liver fibrosis.
PURPOSE
OBJECTIVE
To analyze the performance of liver MRI-based ECV evaluations with different blood pool measurements at different time points.
STUDY TYPE
METHODS
Prospective.
SAMPLE
METHODS
73 consecutive patients (n = 31 females, mean age 56 years) with histopathology-proven liver fibrosis.
FIELD STRENGTH/SEQUENCE
UNASSIGNED
3T acquisition within 90 days of biopsy, including shortened modified look-locker inversion recovery T1 mapping.
ASSESSMENT
RESULTS
Polygonal regions of interest were manually drawn in the liver, aorta, vena cava, and in the main, left and right portal vein on four slices before and after Gd-DOTA administration at 5/10/15 minutes. ECV was calculated 1) on one single slice on portal bifurcation level, and 2) averaged over all four slices.
STATISTICAL TESTS
METHODS
Parameters were compared between patients with fibrosis grades F0-2 and F3-F4 with the Mann-Whitney U and fishers exact test. ROC analysis was used to assess the performance of the parameters to predict F3-4 fibrosis. A P-value <0.05 was considered statistically significant.
RESULTS
RESULTS
ECV was significantly higher in F3-4 fibrosis (35.4% [33.1%-37.6%], 36.1% [34.2%-37.5%], and 37.0% [34.8%-39.2%] at 5/10/15 minutes) than in patients with F0-2 fibrosis (33.3% [30.8%-34.8%], 33.7% [31.6%-34.7%] and 34.9% [32.2%-36.0%]; AUC = 0.72-0.75). Blood pool T1 relaxation times in the aorta and vena cava were longer on the upper vs. lower slices at 5 minutes, but not at 10/15 minutes. AUC values were similar when measured on a single slice (AUC = 0.69-0.72) or based on blood pool measurements in the cava or portal vein (AUC = 0.63-0.67 and AUC = 0.65-0.70).
DATA CONCLUSION
CONCLUSIONS
Liver ECV is significantly higher in F3-4 fibrosis compared to F0-2 fibrosis with blood pool measurements performed in the aorta, inferior vena cava, and portal vein at 5, 10, and 15 minutes. However, a smaller variability was observed for blood pool measurements between slices at 15 minutes.
LEVEL OF EVIDENCE
METHODS
1 TECHNICAL EFFICACY: Stage 3.
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Subventions
Organisme : Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung
ID : 320030_188591
Informations de copyright
© 2024 The Authors. Journal of Magnetic Resonance Imaging published by Wiley Periodicals LLC on behalf of International Society for Magnetic Resonance in Medicine.
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