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Area of Science:

  • Radiology
  • Medical Imaging
  • Magnetic Resonance Imaging

Background:

  • Liver iron overload is a serious condition requiring accurate quantification.
  • Non-invasive methods for determining liver iron content (LIC) are crucial for patient management.
  • Traditional methods for LIC assessment can be invasive or less efficient.

Purpose of the Study:

  • To evaluate the feasibility of using balanced steady-state free precession (bSSFP) sequences for non-invasive liver iron content (LIC) determination.
  • To assess the accuracy and efficiency of bSSFP in quantifying liver iron overload.
  • To determine the sensitivity and specificity of bSSFP for a clinically relevant LIC threshold.

Main Methods:

  • Thirty-five patients with liver iron overload underwent bSSFP MRI.
  • Signal intensity ratios (SIR) of liver to paraspinal muscles were correlated with FerriScan LIC values (reference method).
  • Various bSSFP protocols were evaluated, and the optimal combination was used to calculate LIC.

Main Results:

  • A combination of bSSFP protocols (TRs 3.5, 5, 6.5 ms; FA 17°) showed superior correlation with LIC.
  • Calculated LIC values using the optimal bSSFP combination achieved a sensitivity of 0.91 and specificity of 0.85.
  • The method demonstrated high accuracy despite potential susceptibility artifacts.

Conclusions:

  • Balanced steady-state free precession (bSSFP) is a feasible and suitable MRI technique for quantifying liver iron content (LIC).
  • bSSFP offers high signal-to-noise ratio (SNR) efficiency and enables whole-liver acquisition within a single breath-hold.
  • This technique shows promise for efficient liver iron overload screening and management.