What is Good and Wrong with using -Ultrasound -X-Rays -Gamma Rays -IR in Medical Imaging

-Ultrasound, for now, is Completely Safe, but can give out a Fuzzy Image, in which can only be Soft Tissues, not Bones -X-Rays can Damage Cells but give us Information on the Bones, and other Details that Ultrasound can't -Gamma Rays are also Ionising, but help us seeing how the Body is Functioning -IR is also Very Safe, but just says the Temperature.