E-Posters-The Accuracy of M-Line Length Measurement is Influenced by Sagittal Magnetic Resonance Imaging-scan Orientation -Tianhang Liu, Ph.D Candidate

The Accuracy of M-Line Length Measurement is Influenced by Sagittal Magnetic Resonance Imaging-scan Orientation -Tianhang Liu, Ph.D Candidate

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Pdf Summary

The accuracy of M-Line length measurement, an important indicator for grading pelvic floor relaxation, can be influenced by variations in MRI image collection. This study aimed to investigate the effect of coronal image rotation on the accuracy of M-Line measurement in the sagittal plane. Five female pelvises underwent MRI investigations, and the sagittal plane was defined as the true-sagittal plane. The sagittal images were then angulated by a 5° clockwise rotation in the coronal direction. The results showed that this rotation decreased the M-Line length by 3.388 mm. The study concludes that small changes in MRI coronal localizer scan angulations or minor degrees of hip-sacral sway in the scan-bed can easily influence the accuracy of M-Line length measurements. Therefore, caution should be exercised when interpreting M-Line values if the sagittal image acquisition is not standardized.

Keywords

M-Line length measurement

pelvic floor relaxation

MRI image collection

coronal image rotation

accuracy

sagittal plane

female pelvises

MRI investigations

angulation

hip-sacral sway