Across
- 1. ____constructive interference is not purely in or out of phase
- 3. array used in abdomen, pelvic, ob/gyne
- 5. 1540m/s is the speed of sound (propagation velocity) in what tissue
- 7. ______interference when resultant wave amplitude is cancelled out
- 9. type of u/s tat detects and measures blood flow
- 10. maximum variation of a variable from the mean value (A= [max-min]/2)
- 12. short wavelength, ____frequency
- 13. pulse comes from ___ starting point for sector imaging
- 15. long wavelength, ___frequency
- 18. mechanical wave motion perpendicular to wave direction
- 19. frequency is determined by the ___ of the wave
- 21. mechanical wave motion parallel to wave direciton
- 22. this effect is the principle of converting energy by applying pressure to a crystal
- 25. the amount of cycles of compression and rarefaction occuring in a second
- 26. waves that propogate through a medium
- 28. variables of mechanical change in a medium during sound propogation
- 30. wave propagation causes a ___increase in the surrounding medium as heat is lost
Down
- 2. during compression density ____
- 3. transducer frequency for ___ is 1.6-2.5MZ
- 4. particle ____ is particles moving locally along the wave path
- 5. pie/edge shaped array in cardiac
- 6. one cycle per second unit
- 8. waves that can propogate in a medium or vacuum
- 11. sound is a ____wave
- 14. concentration of force
- 16. physical distance from one compression to the next
- 17. period and frequency are________
- 20. this technique sends a pulse of ultrasound into the patient making echos at organ boundaries
- 23. three scanning formats, ____, sector, and convex/curved
- 24. density=mass/____
- 26. unit of measurement for wavelength
- 27. ______ interference when resultant wave amplitude is 2x the original
- 29. 3 cycles per second is ____Hz