The goal of this study is to build a database of personalized EP (Electrical Properties) maps (accounting for age, anatomical location, and tissue complexity), obtained via MRI, to improve electromagnetic safety assessments, especially in the context of MRI. The EP values derived from this study are expected to be more accurate than current literature values, leading to more realistic specific absorption rate (SAR) modeling and improved patient safety. To investigate age-related differences, the study will include three distinct age groups.

Inclusion Criteria:

• Person aged between 6 and 12, 20 and 40 years or aged 70 years and above
• Person affiliated with a social security scheme or beneficiary of such a scheme
• Person, or parent/legal guardian in the case of minors, who has received full information about the organization of the study and has signed the informed consent form

Exclusion Criteria:

• Contraindication to undergoing an MRI examination or the presence of an MRI-incompatible medical device
• Person presenting a pathology or tissue damage in the examined areas that may affect the measured MRI parameters
• Pregnant woman, woman in labor, or breastfeeding mother
• Person deprived of liberty by judicial or administrative decision, or persons undergoing psychiatric care