MRI Angio Principles Quiz
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Questions and Answers

Which MRI technique does not require contrast media?

  • Pre-saturation MRA
  • Phase Contrast MRA
  • TOF MRA (correct)
  • Contrast-enhanced MRA

    • What effect does pre-saturation have on longitudinal spins in TOF MRA?

  • Causes loss of signal in longitudinal spins (correct)
  • Reverses the magnetization of longitudinal spins
  • Has no effect on longitudinal spins
  • Increases signal in longitudinal spins

    • In TOF MRA, how are the slices oriented with respect to the flow direction?

  • At a 45-degree angle to flow direction
  • Parallel to flow direction
  • Randomly oriented with respect to flow direction
  • Perpendicular to flow direction (correct)

    • What property of blood flow can be quantified in Phase Contrast MRA?

    <p>Velocity and direction</p> Signup and view all the answers

    What is the purpose of bipolar gradients in Phase Contrast MRA?

    <p>To encode phase information</p> Signup and view all the answers

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