Diffusion-weighted imaging in the abdomen and pelvis: concepts and applications

Area of Science:

• Radiology
• Medical Imaging
• Oncology

Background:

• Diffusion-weighted magnetic resonance (MR) imaging is a valuable tool for detecting focal lesions in the abdomen and pelvis.
• Effective utilization requires integration with other MR imaging sequences to avoid diagnostic pitfalls.

Purpose of the Study:

• To highlight the principles and applications of diffusion-weighted MR imaging for lesion detection and characterization.
• To emphasize the importance of optimizing b values and interpreting findings in the context of conventional MR sequences.

Main Methods:

• Utilizing diffusion-weighted MR imaging with adjustable b values for abdominal and pelvic lesion evaluation.
• Correlating diffusion characteristics (apparent diffusion coefficient) with tissue cellularity and viscosity.
• Comparing diffusion-weighted imaging findings with conventional MR sequences.

Main Results:

• Increased tissue cellularity, such as in the endometrium, leads to restricted diffusion, which can mimic disease.
• Highly viscous lesions, like abscesses, also exhibit impeded diffusion.
• Optimized b value selection and multi-sequence interpretation are crucial for accurate lesion characterization.

Conclusions:

• Diffusion-weighted MR imaging is effective for detecting abdominal and pelvic lesions when used with other sequences.
• Understanding the impact of cellularity and viscosity on diffusion is key to accurate interpretation.
• This technique holds potential for improved tissue characterization in conjunction with conventional MR imaging.