Q&A on Specific Absorption Rate (SAR) in MRI

MRI safety starts with understanding SAR. This Q&A from Elster's MRI Questions explains specific absorption rate — what it is, how it's measured, and why it matters — in plain language. A useful primer for trainees.

• Authored by Dr. Allen Elster, a renowned MRI physicist, and hosted on the trusted educational site MRIquestions.com.
• Covers fundamental concepts: SAR definition, measurement, safety thresholds, and why these limits matter during clinical scanning.
• No original research data — serves as a concise, accessible refresher or teaching tool for residents, technologists, and MR safety officers.

RadPigeon summaries are original and for information only. They are not clinical advice.