When performing an x-ray (in the UK specifically) does a radiologist use different settings based on which body part they are x-raying? Or do they have the machine on one setting for everyone? I'm curious because I would like to think that they adjust the x-ray dosage for each individual (and each body part) in order to minimise the amount of radiation the patient receives.
According to this Harvard Medical article, in order to x-ray an arm or leg the average dose is 0.001mSv with a range reported in literature of 0.0002—0.1mSv.
A lumbar spine x-ray would require an average of 1.5mSv with a range reported in literature of 0.5—1.8mSv.
Therefore, it would be safe to say that dosages are adjusted according to the part of the body needing an x-ray image.