Factors controlling T2 mapping from partially spoiled SSFP sequence: optimization for skeletal muscle...

Area of Science:

• Biomedical Engineering
• Magnetic Resonance Imaging
• Skeletal Muscle Physiology

Background:

• Skeletal muscle T(2) relaxation time variations correlate with cell damage and inflammation.
• Existing T(2) measurement methods lack speed, reproducibility, and ease of implementation, hindering clinical adoption.
• Noninvasive characterization of skeletal muscle is crucial for diagnosing and monitoring disease.

Purpose of the Study:

• To present a fast, robust, and accurate methodology for in vivo T(2) mapping.
• To validate the partially spoiled steady state free precession (PSSFP) technique for skeletal muscle T(2) quantification.
• To demonstrate the utility of PSSFP-based T(2) mapping for characterizing muscle diseases.

Main Methods:

• Utilized the partially spoiled steady state free precession (PSSFP) technique.
• Validated the methodology through simulations and phantom experiments.
• Applied the T(2) mapping technique to several examples of muscle disease.

Main Results:

• Demonstrated the accuracy and robustness of the PSSFP method for T(2) mapping.
• Showcased the applicability of the technique for tissue characterization in muscle disease.
• Quantitative T(2) mapping provided objective markers of muscle damage.

Conclusions:

• Quantitative MRI T(2) mapping using PSSFP is a fast, accurate, and reproducible method.
• This technique can serve as an objective, noninvasive marker for muscle damage and degenerative changes.
• PSSFP-based T(2) mapping offers a promising alternative to serial muscle biopsies for skeletal muscle characterization.