RT Journal
A1 Smith-Bindman R, Mehta P
T1 UNcertainties in the dose from full-body airport screening—reply
JF Archives of Internal Medicine
JO Archives of Internal Medicine
YR 2011
FD June 27
VO 171
IS 12
SP 1129
OP 1130
DO 10.1001/archinternmed.2011.259
UL http://dx.doi.org/10.1001/archinternmed.2011.259
AB 
We agree with Dr Rez that there is considerable uncertainty involved in quantifying the doses emitted and absorbed when passengers are imaged with the backscatter scanners. This uncertainty could be reduced if the TSA allowed greater access to the scanners so that additional independent testing and direct measurements could be made. Ideally, every scanner in operation should be checked to ensure its proper functioning. However, it is not clear that estimating doses by reviewing images, or estimating the exposures based on the reported scattered dose, provides greater precision than using estimates that were derived from direct measurements reported by the Johns Hopkins University Applied Physics Laboratory1 and the NIST,2 who were given access to the scanners.