Evaluation of Urinary Sphincter Function by Rapid Magnetic Resonance Diffusion Tensor Imaging.

Area of Science:

• Medical Imaging
• Pelvic Floor Disorders
• Urology

Background:

• Female pelvic floor dysfunction, including urinary incontinence, affects many women.
• Accurate assessment of urinary sphincter and pelvic floor muscle function is crucial for diagnosis and treatment.

Purpose of the Study:

• To evaluate the feasibility of rapid diffusion tensor imaging (DTI) for assessing female urinary sphincter function.
• To differentiate sphincter function between rest and voluntary muscle contraction using DTI.

Main Methods:

• 10 healthy female volunteers underwent 3 Tesla MRI of the lower pelvis.
• Diffusion tensor imaging (DTI) was performed during rest and contraction phases.
• Mean diffusivity (MD) and fractional anisotropy (FA) values were analyzed, with manual segmentation of the urinary sphincter and levator ani muscles.

Main Results:

• Significant differences in Mean Diffusivity (MD) values were observed between rest and contraction phases (P<0.001).
• A mean MD difference of 20.6% was found between rest and contraction states.
• High interreader agreement was achieved for both MD (ICC=0.85) and FA (ICC=0.79).

Conclusions:

• Rapid DTI is a feasible technique for evaluating female urinary sphincter function.
• DTI can differentiate between sphincter states of rest and contraction.
• This imaging modality may serve as a valuable tool for assessing pelvic floor muscle function and incontinence.