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Magnetic Resonance Learning Objectives: Understanding MR Principles and Signal Contrast

Dive into the essential concepts of magnetic resonance imaging, including the Bloch equation, signal representation, Fourier transform trajectories, contrast mechanisms, and sequence parameters. Learn how to apply these principles to predict magnetization, calculate field of view, and optimize resolution for improved imaging outcomes.

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Magnetic Resonance Learning Objectives: Understanding MR Principles and Signal Contrast

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  1. Magnetic Resonance Learning Objectives Understand Bloch equation. What does each term mean? How is each term used to create signal and/or contrast? Longitudinal Relaxation Transverse Relaxation Apply this to calculate Mz after various excitations Predict transverse magnetization as a function of time.

  2. Magnetic Resonance Learning Objectives Signal Equation - Ch.5 Understand how MR signal represents Fourier representation of object. What role does the MR coil play? How do gradient encode signal? How does gradient waveform relate to k-space trajectory? How does sampling interval, gradient amplitudes, pulse sequence determine FOV, resolution, and aliasing?

  3. Magnetic Resonance Learning Objectives - 2D Fourier Transform trajectories - readout, phase encode, slice selection - projection reconstruction For given FOV and resolution, sample interval, determine gradient amplitude.

  4. What causes phase errors in MR? How do phase errors appear in gradient and spin echo exams? Signal contrast How is T1 contrast achieved? How is T2 contrast achieved? How do inversion recovery sequences create contrast? How does SNR vary as sequence parameters change? - FOV, - imaging matrix - receiver bandwidth What options do you have to change the sequence to change imaging parameters? -How can you increase resolution? FOV? - How do you increase slice thickness? MR Learning Objectives

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