Magnetic Resonance Imaging (MRI) Practice Test

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What do the rBW effects primarily influence?

  1. Image resolution

  2. Signal-to-noise ratio and chemical shift

  3. Magnetic susceptibility

  4. Slice thickness

The correct answer is: Signal-to-noise ratio and chemical shift

The rBW effects, or receiver bandwidth effects, primarily influence the signal-to-noise ratio and chemical shift in MRI. Receiver bandwidth determines the range of frequencies that can be captured during imaging. A wider receiver bandwidth increases the signal-to-noise ratio because it allows for more noise to be averaged out, thereby improving image quality. However, it also affects the chemical shift, which is the difference in resonance frequency of different chemical environments. A wider bandwidth can reduce the impact of chemical shift artifacts, allowing for more accurate representation of the tissue being imaged. This interplay between bandwidth, signal-to-noise ratio, and chemical shifts is crucial for optimizing MRI images and ensuring clear and accurate diagnostic information.

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