More support that a MRI is best for assessment of PT as a CT might actually cause PT.
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John W. Gofman, MD, PhD, was Professor Emeritus of Molecular and Cell Biology at the University of California, Berkeley and one of the world's most distinguished medical and nuclear scientists. There's also renewed interest in this with association to PT.
One of radiation's most striking effects is causing arterial cells to multiply abnormally. The abnormal growth of cells lining the arteries has the effect of narrowing the arteries.
Abnormal growth of smooth muscle tissue inside the artery creates something similar to scar tissue that occludes the arteries and ruins their flexibility. Lipid-laden cells, monocytes, macrophages, cholesterol, fibrin, and calcium are all components of plaques and collect within damaged areas in the inner arterial wall where arteries eventually clog.
As early as 1944, scientists showed that radiation could produce plaques and foam cells. Since then, additional studies have demonstrated that radiation can produce arterial lesions, sticky platelets, and increased free radicals. In fact, radiation can create atherosclerosis in its entirety. Studies show that people who have undergone radiation of areas containing major blood vessels often develop atherosclerosis in those blood vessels.