Now playing · 02 Imaging

Water-equivalent diameter

WED = 27.64 cm

WED=2Aw/π,Aw=∑i(HUi1000+1)ΔA\mathrm{WED}=2\sqrt{A_w/\pi},\quad A_w=\sum_i \left(\frac{\mathrm{HU}_i}{1000}+1\right)\Delta A

WED = 2 √(A_w / π) from the water-equivalent area of the CT slice.

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