DCE-MRI in experimental chronic pancreatitis

Area of Science:

• Radiology
• Gastroenterology
• Medical Imaging

Background:

• Chronic pancreatitis (CP) is a progressive inflammatory disease leading to irreversible damage.
• Accurate assessment of pancreatic perfusion is crucial for diagnosing and staging CP.
• Current diagnostic methods may have limitations in evaluating subtle perfusion changes.

Purpose of the Study:

• To evaluate the utility of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) in assessing pancreatic perfusion in an experimental model of CP.
• To correlate DCE-MRI parameters with the severity of experimentally induced CP in piglets.

Main Methods:

• Twenty-one piglets underwent pancreatic duct ligation to induce experimental CP.
• DCE-MRI was performed on a 1.5 T scanner.
• Signal intensity-time (SI-T) curves were generated, analyzing steepest slope (SS), time-to-peak (TTP), and peak enhancement ratio (PER).

Main Results:

• Significant differences in SS and TTP were observed across CP grades (p < 0.000 for both).
• SS decreased with increasing CP severity (r = -0.719, p = 0.000).
• TTP increased with increasing CP severity (r = 0.538, p = 0.012).
• PER did not significantly correlate with CP severity (p = 0.668).

Conclusions:

• DCE-MRI parameters, specifically SS and TTP derived from SI-T curves, are correlated with the severity of experimental chronic pancreatitis.
• DCE-MRI demonstrates potential as a diagnostic tool for moderate to advanced CP.