1.5 versus 3 versus 7 Tesla in abdominal MRI: A comparative study

Area of Science:

• Radiology
• Medical Imaging
• Magnetic Resonance Imaging

Background:

• Magnetic Resonance Imaging (MRI) is a crucial diagnostic tool.
• Field strength significantly influences MRI performance and image quality.
• Comparing different Tesla strengths is essential for optimizing abdominal MRI protocols.

Purpose of the Study:

• To evaluate the feasibility and impact of varying magnetic field strengths (1.5T, 3T, 7T) on non-enhanced abdominal MRI.
• To compare image quality and artifact levels across different Tesla strengths.
• To assess the diagnostic potential of 7T MRI for abdominal imaging.

Main Methods:

• Abdominal MRI was performed on 10 healthy volunteers using 1.5T, 3T, and 7T systems.
• Standard sequences including T1-weighted (FLASH, VIBE) and T2-weighted (TSE) were utilized.
• Field of view and acquisition times were standardized, prioritizing high spatial resolution.

Main Results:

• 1.5T and 3T MRI provided comparable results.
• 7T MRI demonstrated higher spatial resolution and improved non-enhanced vessel signal, beneficial for vascular and parenchymal disease diagnosis.
• 7T MRI was more susceptible to artifacts (B1 inhomogeneities, susceptibility, chemical shift), reducing overall image quality and diagnostic value in T2-weighted imaging.

Conclusions:

• T1-weighted 7T abdominal MRI is feasible and comparable to 1.5T and 3T, showing potential for non-enhanced Magnetic Resonance Angiography (MRA).
• 1.5T and 3T MRI offer superior T2-weighted image quality compared to 7T MRI.
• The choice of Tesla strength depends on the specific diagnostic application in abdominal MRI.