For shorthaul crew this would amount to ~175 exposures per annum, combined with airborne exposure. Aircrew are already have one of the highest occupational radiation exposures any group.
This will not come to pass. Pilots & flight attendants will refuse this point blank. This is non-negotiable, personally I'd "dying in the ditch" to stop this.
Backscatter X-ray Health effects wikipedia link.
Originally Posted by wikipedia
Fathers exposed to medical diagnostic x-rays are more likely to have infants who contract leukemia, especially if exposure is closer to conception or includes two or more X-rays of the lower gastrointestinal (GI) tract or lower abdomen.[30] In medical radiography the x-ray beam is adjusted to expose only the area of which an image is required, so that generally shielding is applied to the patient to avoid exposing the gonads,[31] whereas in an airport backscatter scan, the testicles of men and boys will be deliberately subjected to the direct beam, and radiation will also reach the ovaries of female subjects. Whilst the overall dose averaged over the entire body is lower in a backscatter X-ray scan than in a typical medical X-ray examination, because of the shielding of the gonads used in medical radiography this in itself does not mean that the dose to the testicles would be less in an airport scan.