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Backscatter factor BSF

BSF = 1.030

BSF(s)=TAR(dmax⁡,s)=D(dmax⁡)Dair\mathrm{BSF}(s)=\mathrm{TAR}(d_{\max},s)=\frac{D(d_{\max})}{D_{\mathrm{air}}}

BSF = TAR(dmax, s) = dose at dmax in phantom / dose in air at the same point.

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