New imaging techniques for non-alcoholic steatohepatitis

Area of Science:

• Hepatology
• Radiology
• Medical Imaging

Background:

• Non-alcoholic fatty liver disease (NAFLD) is a spectrum of liver conditions.
• Differentiating simple hepatic steatosis from non-alcoholic steatohepatitis (NASH) is clinically crucial but challenging with current imaging.
• Existing imaging modalities lack reliability in distinguishing these stages.

Purpose of the Study:

• To review the strengths and weaknesses of current clinical and experimental imaging modalities for noninvasive detection of NAFLD.
• To emphasize imaging techniques for NASH detection.
• To explore functional imaging approaches beyond passive observation.

Main Methods:

• Review of predominant non-nuclear imaging modalities.
• Focus on techniques investigating functional differences between simple hepatic steatosis and NASH.
• Analysis based on current models of NAFLD pathogenesis and progression.

Main Results:

• No single imaging modality is currently proven to reliably differentiate simple hepatic steatosis from NASH.
• Functional imaging approaches, investigating dynamic processes, show promise.
• Techniques that assess functional differences, rather than just structural changes, yield more interesting results.

Conclusions:

• Reliable noninvasive differentiation of simple hepatic steatosis from NASH remains an unmet clinical need.
• Functional imaging holds potential for improved non-alcoholic fatty liver disease diagnosis.
• Further research into advanced, functional imaging techniques is warranted for NASH detection.