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Fluoroscopy air-kerma rate

K̇_IRP = 40.00 mGy/min

K˙IRP=K˙ref(drefdIRP)2,t=K/K˙\dot K_{\mathrm{IRP}}=\dot K_{\mathrm{ref}}\left(\frac{d_{\mathrm{ref}}}{d_{\mathrm{IRP}}}\right)^2,\quad t=K/\dot K

K̇ at IRP from displayed K̇ and inverse-square, plus cumulative KAP → time.

Laser