The investigators hypothesize that diffusion tensor imaging (DTI) will produce a similar map of autonomic pelvic innervation to that obtained using 3D morphological MRI sequences

Inclusion Criteria:

• The patient must have given their free and informed consent and signed the consent form
• The patient must be a member or beneficiary of a health insurance plan
• The patient it at least 18 years old
• The patient has been admitted for an MRI examination of the pelvic region, for any reason

Exclusion Criteria:

• The subject is participating in an interventional study, or is in a period of exclusion determined by a previous study
• The subject refuses to sign the consent
• It is impossible to give the subject informed information
• The patient is under safeguard of justice or state guardianship
• The patient is pregnant or breast feeding
• There is a contra-indication for MRI (pacemaker, claustrophobic patient)
• The patient has had previous pelvic surgery

All patients admitted to the Medical Imaging Department of the CHU Nîmes for an MRI examination of the pelvic region for any reason