Optimization of shoulder synthetic MRI through post-processing and comparison with conventional MRI

Area of Science:

• Radiology
• Medical Imaging
• Magnetic Resonance Imaging

Background:

• Conventional MRI is the standard for shoulder imaging.
• Optimizing image quality and acquisition time is crucial for clinical utility.

Purpose of the Study:

• Evaluate synthetic MRI (sMRI) utility for shoulder imaging compared to conventional MRI.
• Optimize sMRI post-processing parameters for morphological images.
• Assess T2 value agreement between multi-echo spin-echo (MESE) and multi-dynamic multi-echo (MDME) sequences.

Main Methods:

• Twenty healthy volunteers underwent shoulder MRI.
• sMRI parameters were optimized for tendon-muscle contrast.
• Radiologists analyzed conventional, preset sMRI, and optimized sMRI images.
• Qualitative and quantitative image analyses were performed.
• T2 values of cartilage and supraspinatus muscle were measured.

Main Results:

• Optimized sMRI achieved comparable rotator cuff visibility to conventional MRI.
• sMRI with specific parameters showed high tendon-muscle contrast.
• T2 values from MDME were consistent with MESE in muscle but differed in cartilage.
• Conventional MRI had the highest image quality for fat-suppressed T2-weighted images.

Conclusions:

• Synthetic MRI, with optimized parameters, provides acceptable image quality for shoulder assessment.
• Simultaneous acquisition of morphological images and quantitative maps in under five minutes is promising for shoulder examinations.