Arterial Spin Labeling

Conventional coronary MRA techniques display the coronary blood-pool along with surrounding structures including the chest-wall, myocardium, ventricular and atrial blood-pools, and great cardiac vessels (Figs. 1-4). This representation of the coronary lumen is not directly analogous to the information provided by x-ray coronary angiogra-phy, in which the coronary lumen displaced by contrast agent is depicted exclusively. Analogous "luminographic" data may be obtained using MR arterial spin tagging [55]. This technique enables exclusive and selective 3D visualization of the coronary blood-pool without user-assisted segmentation or post-processing (Fig. 5). However, despite its potential, the technique inherently doubles the acquisition time and is sensitive to misregistrations. Consequently, very efficient motion compensation mechanisms are required.

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Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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