Hepatic fat quantification using automated six-point Dixon: Comparison with conventional chemical shift based...

Area of Science:

• Radiology
• Medical Imaging
• Hepatology

Background:

• Hepatic steatosis (fatty liver disease) is a growing health concern.
• Accurate quantification of liver fat is crucial for diagnosis and management.
• Current methods for hepatic fat quantification have limitations.

Purpose of the Study:

• To compare automated six-point Dixon (6-p-Dixon) MRI with dual-echo chemical-shift-imaging (CSI) and CT for hepatic fat fraction assessment.
• To evaluate the accuracy of 6-p-Dixon MRI in phantoms and a clinical study.

Main Methods:

• Phantoms and 59 patients underwent both MRI (6-p-Dixon and dual-echo CSI) and CT scans.
• Quantitative fat measurements were obtained using all three modalities.

Main Results:

• Phantom study showed good agreement between fat concentration and 6-p-Dixon MRI.
• Clinical study demonstrated good agreement between 6-p-Dixon MRI and dual-echo CSI.
• CT attenuation values strongly correlated with both 6-p-Dixon MRI (R²=0.852) and dual-echo CSI (R²=0.812).

Conclusions:

• Automated 6-p-Dixon MRI and dual-echo CSI accurately correlate with CT attenuation values for liver parenchyma.
• 6-p-Dixon MRI demonstrates significant potential for automated hepatic fat quantification.