ct scan
"A modern CT scan is like a spiral x-ray. As the patient slowly moves through the machine, x-ray guns and detectors turn around the patient's head (or other body part). Computers assemble the information into a detailed scan of the entire brain, providing an incredible view of the structures within the brain."
" The stress echo is still a dynamic test akin to driving the car round the track, whereas the CT scan is like opening up the car cylinders to have a look when the car is static and switched off. The CT scan is more of a structural study as opposed to a dynamic study. Both have their merits, but with the worries created by Fukushima, some patients may wish to avoid the medical radiation involved in a CT scan."
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