PT2 Chapter 1 & 2: Introduction and History | RF Pulse Sequences Spine Echo based Quiz

PT2 Chapter 1 & 2: Introduction and History | RF Pulse Sequences Spine Echo based Quiz

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  1. . Hahn echoes were discovered by Carr and Purcell
  2. After excitation of an RF pulse <180° the tissue magnetization is a rotating movement with a certain angle around the external field direction (precession motion)
  3. . The magnetization vector spreads out in the x-y plane after the 180° RF pulse
  4. which is true?
  5. The TR influences the S/N Ratio in a SE RF sequence technique
  6. In a SE RF sequence with 2 echoes resp. 30- and 120ms the 180 RF pulses are on 30 and 60ms
  7. which is true?
  8. which are true?
  9. The transverse relaxation time T2 is shorter as the protons are stronger coupled with each other in a tissue
  10. . The GM has a higher T1 value than the WM brain tissue