MR Elastography is a new technique aimed at non-invasively measuring the stiffness of tissues. It has recently given interesting results in the assessment of liver fibrosis.

The objectives of the current study are:

1. to develop an imaging protocol for MR Elastography of the kidneys;
2. To calculate the stiffness of normal kidneys;
3. To evaluate the variability of the measurements of kidney stiffness by repeating the procedure twice on the same volunteers.

Inclusion Criteria:

• Age between 18 and 40
• Signed informed consent form
• Insured by the French Social Security

Exclusion Criteria:

• Pregnancy
• Personal or familial history of kidney disease
• Hypertension
• Diabetes
• Contraindication to MRI