Quantum magnetic resonance imaging diagnostics of human brain disorders

摘要: The signal in magnetic resonance imaging MRI sequences depends on chemical composition of tissues; cellular organization and metabolism are little relevance. Diffusion-weighted images (DWI) is designed to evaluate diffusion movements the molecules a spatial axis. These incoherent microscopic molecular cause loss phase protons reduce intensity. Diffusion may be evaluated different axis at time/space scales, depending direction, timing, strength applied field gradients. Signal simply converted into an image or further elaborated obtain quantitative map ADC. A region restricted given will appear hyperintense DWI hypointense ADC maps. tissues capillary flow intracellular requiring active metabolism. In addition proton spectroscopy (PMRS) provides useful information, complementing that gained through MRI, with regard cell membrane proliferation, neuronal damage, energy metabolism, necrotic transformation brain tumor tissues. One needs able interpret both data accurately derive information about location, edema, mass effect, calcification, cyst formation, visualization, contrast enhancement, patient's age clinical presentation.