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Neither, a CAT scan is one where computers are used to synthesise an image, but the radiation used is usually X-rays, though positron emission can be used, in this case it will be using appropriate radiation sources. Fusion and fission don't come into it.
No. If you are considering hair loss as the result of high levels of radiation dose, nuclear medicine scans don't give anywhere near enough radiation to cause that. In fact, most common nuclear medicine scans deliver less radiation than a CT scan.
The amount of radiation is so slight that even the sensitive testicular tissue is at minimum risk.
If a patient is pregnant, it is generally recommended that she not have a kidney nuclear medicine scan. The unborn baby is more sensitive to radiation than an adult. If a woman thinks she might be pregnant, she should inform her doctor.
Gallium scan
No
radiopharmaceutical
No, you can't. The high energy photons pass through you, and will do some damage to the tissues of your body because they are ionizing radiation, but you will not be able to feel it.
Doesn't it make you wonder why these radiation questions have not been answered??
radiopharmaceutical
the kidney nuclear medicine scan is unique in that it reveals how the kidneys are functioning. This is valuable information in helping a doctor make a diagnosis.
They scan your boarding pass because, after 9/11, you cannot go through security to the gate area unless you have a boarding pass.