Pelvic protocol for endometriosis (MRI)

Last revised by Arlene Campos on 11 Jan 2024

Evaluation of known endometriosis with MRI requires a slightly different protocol to a routine pelvic MRI (see pelvic MRI protocol: routine) and should probably be reserved for known cases of endometriosis rather than for the assessment of pelvic pain.

IV or IM Buscopan is administered to reduce bowel peristalsis and hence improve image quality.

A protocol might involve:

  • a body coil

  • T1W and T2W axial sequences

  • T1W fat-suppressed sequences: axial, sagittal and coronal 1

Gadolinium is not particularly useful in the evaluation of endometriomas 2 and does not improve detection of very small implants as small vessels enhance and may be misinterpreted as a small endometriotic deposit 1. Additionally, enhancement of endometrial deposits is variable post contrast and does not differentiate from other benign or malignant processes. Dynamic contrast-enhanced MRI can also be utilized but is not routinely recommended ref.

See also

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