Upright 0.5 T open MR defaecating proctography proof of concept study: the inter- and intra-rater variability of pelvic floor measures using seated proctography
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View abstract on PubMed
Summary
This summary is machine-generated.Upright magnetic resonance defaecating proctography (uMRDP) is a feasible and reliable technique for assessing pelvic floor function. This method offers a valuable alternative to traditional supine imaging, providing complementary data for clinical use.
Area Of Science
- Medical Imaging
- Gastroenterology
- Pelvic Floor Disorders
Background
- Traditional defaecating proctography often involves supine positioning and may require contrast agents.
- Assessing pelvic floor dynamics during defecation is crucial for diagnosing functional disorders.
Purpose Of The Study
- To evaluate the feasibility, data quality, and reliability of an upright magnetic resonance defaecating proctography (uMRDP) technique.
- To assess the uMRDP technique using an Open 0.5 T ASG MRI scanner.
Main Methods
- Eight healthy volunteers underwent seated defecation using a specialized coil in an Open MRI scanner.
- An optimized T2-weighted HASTE sequence captured dynamic pelvic floor changes.
- Pelvic floor metrics were extracted and analyzed for inter- and intra-rater variability.
Main Results
- All pelvic floor landmarks were identifiable, with acceptable inter- and intra-rater variability for metric extraction.
- Intra-rater variation was marginal (5-21% and 3.2-44%).
- Satisfactory inter-rater correlation (r² > 0.93) and precision (agreement range 5.8-20.4 mm) were achieved.
Conclusions
- Upright magnetic resonance defaecating proctography (uMRDP) is a feasible and reliable alternative to supine MRDP.
- The technique does not require gadolinium injection or bowel preparation.
- uMRDP captures defecation in a natural seated posture, offering complementary information to fluoroscopic proctography.
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