Radiology Board Practice Questions - Saudi Board Diagnostic Radiology Final Written Exam

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In magnetic resonance imaging, how does doubling the static magnetic field strength (from 1.5T to 3.0T) affect the Specific Absorption Rate (SAR)?

SAR increases by a factor of 4. SAR doubles. SAR remains unchanged. SAR decreases by half.

Correct Answer:

SAR increases by a factor of 4.

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