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MR Fingerprinting for Liver Tissue Characterization: A Histopathologic Correlation Study.

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Summary
This summary is machine-generated.

Liver MR fingerprinting (MRF) offers repeatable T1, T2, T2*, and proton density fat fraction (PDFF) mapping in diffuse liver disease. These MRF metrics align well with reference quantitative MRI and show potential for correlating with liver biopsy findings.

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Area of Science:

  • Radiology
  • Medical Imaging
  • Quantitative MRI

Background:

  • Liver MR fingerprinting (MRF) allows simultaneous T1, T2, T2*, and proton density fat fraction (PDFF) quantification in a single breath-hold.
  • Histopathologic validation is crucial for the clinical adoption of liver MRF.

Purpose of the Study:

  • Compare liver MRF metrics against reference quantitative MRI in diffuse liver disease.
  • Assess the scan-rescan repeatability of liver MRF.
  • Validate MRF measurements against histologic grading from liver biopsies.

Main Methods:

  • Prospective study involving participants with diffuse liver disease undergoing liver MRF and reference quantitative MRI.
  • Analysis included linear regression, Bland-Altman plots, and coefficients of variation for MRF repeatability.
  • Spearman correlation was used to evaluate the association between MRF mapping and histologic grading.

Main Results:

  • High linearity (R² values: T1=0.86, T2=0.88, T2*=0.54, PDFF=0.99) between MRF and reference measurements.
  • Excellent MRF repeatability with coefficients of variation: T1=3.2%, T2=5.5%, T2*=7.1%, PDFF=4.6%.
  • Strong diagnostic performance for inflammation (AUC=0.92) and steatosis (AUC=0.97).

Conclusions:

  • Liver MRF provides repeatable T1, T2, T2*, and PDFF maps with high agreement to reference quantitative MRI.
  • MRF-derived metrics demonstrate potential for correlating with pathologic grades in diffuse liver disease.