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Sectional Anatomy for Imaging Professionals 4e. Bontrager's Handbook of Radiographic Positioning and Techniques.
Citations Publications citing this paper. Juhani Airaksinen. Driessen , Pieter G.
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Chronic total coronary occlusions in patients with stable angina pectoris: impact on therapy and outcome in present day clinical practice Gerald S. References Publications referenced by this paper. Rob S. There are many varieties of brain disorders that affect humans, including dementia, epilepsy, and other disorders that are more generally thought of as being "behavioral" rather than biological.
Diagnostic procedures may be needed to confirm a diagnosis and imaging tests such as computed tomography CT , magnetic resonance imaging MRI , angiography, positron emission tomography PET , and Doppler ultrasonography are commonly used to diagnose neurologic disorders. Early research and clinical applications of PET imaging were almost exclusively devoted to the brain, and provided immense amounts of data that have advanced the understanding of brain function, and changes in regional glucose metabolism.
MRI and CT scans render exquisite anatomical detail about the structure of the brain, but are unable to determine anything about its function.
Brain disorders start with functional abnormalities that result in either an increase or decrease in glucose metabolism at a cellular level. These functional changes precede the formation of an abnormal mass, the shrinkage of brain tissue, or other abnormalities seen on anatomical imaging, sometimes by years.
In Alzheimer's disease for example, there is a characteristic pattern of decreased biomarker uptake in the posterior parietotemporal cortex, which could be caused by neuronal depletion in that area.