High-resolution magnetic resonance imaging quantitatively detects individual pancreatic islets

Area of Science:

• Biomedical Imaging
• Magnetic Resonance Imaging
• Diabetes Research

Background:

• Detecting and quantifying pancreatic islets is crucial for understanding diabetes.
• Current methods for islet evaluation have limitations in vivo.
• Manganese-enhanced MRI offers potential for non-invasive islet imaging.

Purpose of the Study:

• To determine if manganese-enhanced high-field MRI (MEHFMRI) can quantitatively detect individual islets in situ and in vivo.
• To evaluate MEHFMRI's ability to assess changes in islet number and volume in a model of experimental diabetes.

Main Methods:

• Whole pancreata from mice were imaged ex vivo using MEHFMRI.
• Exteriorized pancreata were imaged in vivo using MEHFMRI.
• MR images were acquired on a 14.1 Tesla scanner and correlated with histological sections.

Main Results:

• MEHFMRI distinguished pancreatic tissues and evaluated islet abundance in normoglycemic mice.
• A significant decrease in islet numerical and volume density was detected in streptozotocin-induced diabetic mice.
• Individual islets were visualized in vivo in living mice.

Conclusions:

• MEHFMRI quantitatively visualizes individual islets in the intact mouse pancreas.
• The technique is effective both ex vivo and in vivo.
• MEHFMRI shows promise for assessing islet status in diabetes research.