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Relative SAR

SAR₂/SAR₁ = 4.000

SARB02θ2/TR\mathrm{SAR}\propto B_0^2\,\theta^2/\mathrm{TR}

SAR ∝ B₀² θ² / TR × (duty of the RF train). Doubling B₀ quadruples SAR at the same flip.

Laser