Medical Physics

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Across
  1. 4. reduction of xray intensity
  2. 5. single‑line ultrasound measurement
  3. 7. amplifies light signal
  4. 8. metastable gamma emitter
  5. 9. contrast for intestines
  6. 11. high‑frequency sound waves
  7. 14. detects gamma photons
  8. 17. coupling medium for ultrasound
  9. 18. positron emitter used in PET
  10. 20. rotating xray slices for 3D image
  11. 23. photon creates electron positron
  12. 25. parallel photon selector
  13. 26. radioactive substance for imaging
  14. 28. specific energy xray emission
  15. 29. ultrasound bounce at boundary
Down
  1. 1. full absorption of photon
  2. 2. electron acceleration to metal target
  3. 3. frequency shift from motion
  4. 5. exponential drop in intensity
  5. 6. scatter with ejected electron
  6. 9. spectrum from electron deceleration
  7. 10. velocity from doppler shift
  8. 12. 2D ultrasound image
  9. 13. resistance to sound in medium
  10. 15. produces voltage when stressed
  11. 16. high‑Z absorber for imaging
  12. 19. reducing reflection between media
  13. 21. converts gamma to light
  14. 22. generates and detects ultrasound
  15. 24. contrast for blood vessels
  16. 27. positron annihilation imaging