Time-of-Flight Effects in Medical Imaging
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Questions and Answers

What are time-of-flight (TOF) effects?

  • Signal variations due to motion of photons in an imaging volume
  • Signal variations due to motion of protons in an imaging volume (correct)
  • Signal variations due to motion of neutrons in an imaging volume
  • Signal variations due to motion of electrons in an imaging volume

    • What is flow-related enhancement?

  • Increased signal due to inflow of spins (correct)
  • Decreased signal due to outflow of spins
  • Increased signal due to outflow of spins
  • Decreased signal due to inflow of spins

    • What is high-velocity signal loss, also called 'washout'?

  • Decreased signal intensity due to inflow of spins
  • Increased signal intensity due to inflow of spins
  • Decreased signal intensity due to outflow of spins (correct)
  • Increased signal intensity due to outflow of spins

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