Echo planar imaging of the abdomen

Area of Science:

• Medical Imaging
• Radiology
• Magnetic Resonance Imaging

Background:

• Echo planar imaging (EPI) is an ultrafast magnetic resonance (MR) technique developed over 15 years ago.
• EPI acquires all image data rapidly (50-150 ms), requiring specialized hardware for magnetic field gradients and data acquisition.
• Standard MR methods can be limited by motion artifacts in abdominal imaging.

Purpose of the Study:

• To highlight the advantages and potential of Echo planar imaging (EPI) in abdominal applications.
• To discuss how EPI overcomes limitations of conventional MR imaging in the abdomen.
• To explore emerging applications of EPI in abdominal diagnostics.

Main Methods:

• Utilizing ultrafast data acquisition (50-150 ms) inherent to EPI.
• Employing specialized hardware for magnetic field gradients and data acquisition systems.
• Applying EPI for T2-weighted imaging, diffusion imaging, and MR angiography in the abdomen.

Main Results:

• EPI images are insensitive to respiratory and peristaltic motion, reducing blurring.
• Improved lesion characterization compared to standard MR imaging methods.
• Segmented EPI allows high-resolution T2-weighted imaging within a single breath-hold.
• Abdominal diffusion imaging is now feasible due to EPI's motion insensitivity, correlating with kidney function.
• Faster MR angiography is achievable using EPI readouts.

Conclusions:

• Echo planar imaging (EPI) significantly enhances abdominal MR imaging capabilities.
• EPI offers potential for improved anatomical and functional assessment, despite needing further improvements in spatial resolution and artifact reduction.
• The technique holds promise for advancing diagnostic accuracy in abdominal conditions.