Wallace H, Martin CJ, Sutton DG, et al. Establishment Of Scatter Factors For Use In Shielding Calculations And Risk Assessment For Computed Tomography Facilities. J Radiol Prot. 2012 Mar;32(1):39-50.

In this study the link between scatter air kerma and DLP has been investigated for CT scanners from different manufacturers. Factors recommended to derive the scatter air kerma at 1 m from the isocentre are 0.36 μGy (mGy cm)−1 forthebodyand0.14 μGy (mGy cm)−1 forheadscans. The CT scanner gantries only transmit 10% of the scatter air kerma level and this can also be taken into account when designing protection.

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