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MRI has opened up new possibilities in combined morphological and functional imaging, and now there is a book which discusses both aspects together. Two systems which already demonstrate the advantages of MRI are presented. In the cardiovascular system, motion and flow can be imaged so that even flow velocities in the deep vessels of the body can be measured, and turbulences can be identified. In the study of the kidneys, a combination of renally excreted contrast media and imaging provides within seconds insight into glomerular filtration in health and disease. These current possibilities, and their limitations, bring insight into the future potential of MRI.
Atherosclerosis is the principal underlying cause of cardiovascular and cerebrovascular disease in people of the Western world. Cigarette smoking has been implicated in both the initiation and exacerbation of the atherosclerotic process. Data to support this implication derives primarily from epidemiologic studies where the relationship between the incidence of atherosclerosis in people who smoke cigarettes has been shown to have a strong correlation. There are few well established explanations for this phenomenon, and basic molecular, biochemical, and cellular mechanisms associated with smoking and the development of atherosclerosis remain both undefined and virtually unexplored. Even the e...
First multi-year cumulation covers six years: 1965-70.
Exactly sixty years ago Schretzenmayer provided the first experimental proof that changes in blood ftow can affect the diameter oflarge arteries. Since then, support has been growing for the idea that intraluminal blood ftow plays an important role in regulating not only the tone of blood vessels, but also their caliber and structure. Investigations of the&e phenomena have been given a strong impetus by the discovery that the endothelium can modulate the tone of underlying vascular smooth muscle via the release of a number of vasoactive substances. Investigators often diverge in their opinions regarding the nature of the vascular wall response to blood ftow and the mechanisms involved. This ...