Simulation Techniques for Evaluating Magnetic Resonance Imaging
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Magnetic Resonance Imaging (MRI) is unique in its ability to reflect contrast on the basis of several different mechanisms. The signal is related to the hydrogen density, N(H), and the rates of relaxation, T1 and T2. Each of these factors can be exploited individually to provide contrast. The direct dependence of signal on the number of spins present, i.e., the hydrogen density, is obvious. The relationships involving T1 and T2 are less intuitive and in some sense reflect competing behaviors. T1 involves a regrowth of magnetization; T2 represents a decay.
KeywordsWhite Matter Inversion Recovery Cerebral Spinal Fluid Hydrogen Density Polarity Information
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