# Presents Sonomicrometry: basic principles - PowerPoint PPT Presentation

Presents Sonomicrometry: basic principles

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Presents Sonomicrometry: basic principles

## Presents Sonomicrometry: basic principles

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##### Presentation Transcript

1. Presents Sonomicrometry: basic principles

2. Basic Principles • Theory of Operation • Construction of a crystal • Types of crystals available • Signals: direction and function • Calculation of distance • Sample Application – Ventricular Volume • Crystal placement • Representative data

3. Theory of Operation • Construction of a crystal Epoxy covers the head Head diameter: - 2mm - 1mm - 0.7 mm Wire : copper

4. Theory of Operation • Construction of a crystal Epoxy covers the head Head diameter: - 2mm - 1mm - 0.7 mm Wire : Stainless steel

5. Theory of Operation • Construction of a crystal Epoxy covers the head Epoxy covers the head Head diameter: - 2mm - 1mm - 0.7 mm Wire covered by Silastic tubing for chronic studies

6. Theory of Operation • Piezo electric transducers: • Crystal #1 sends a sound wave …crystal #2 receives signal transmitter Receiver

7. Theory of Operation • Piezo electric transducers: transceiver: • Crystal #1 sends a sound wave …crystal #2 receives signal Receiver Transmitter • Crystal #2 sends a sound wave …crystal #1 receives signal

8. Theory of Operation • Piezo electric transducers: transceiver: • Time of flight  distance = v * T • v = 1540 m/sec Receiver transmitter Distance = 1.5 mm Time of flight 1 sec

9. Theory of Operation • Piezo electric transducers: transceiver: • Time of flight  distance = v * T • v = 1540 m/sec Receiver transmitter Distance = 3 mm Time of flight 2 sec

10. Theory of Operation • Piezo electric transducers: transceiver: • Time of flight  distance = v * T • v = 1540 m/sec Receiver transmitter Distance = 4.5 mm Time of flight 3 sec

11. Theory of Operation • Piezo electric transducers: transceiver: • Time of flight  distance = v * T • v = 1540 m/sec Receiver transmitter Distance = 6 mm Time of flight 4 sec

12. Theory of Operation • Piezo electric transducers: transceiver: • Time of flight  distance = v * T • v = 1540 m/sec Receiver transmitter Distance = 7.5 mm Time of flight 5 sec

13. Theory of Operation • Piezo electric transducers: transceiver: • Time of flight  distance = v * T • v = 1540 m/sec Receiver transmitter Distance = 9 mm Time of flight 6 sec

14. Theory of Operation • Piezo electric transducers: transceiver: • Time of flight  distance = v * T • v = 1540 m/sec Receiver transmitter Distance = 9.5 mm Time of flight 7 sec

15. Theory of Operation • Piezo electric transducers: transceiver: • Time of flight  distance = v * T • v = 1540 m/sec Receiver transmitter Distance = 11 mm Time of flight 8 sec

16. Theory of Operation • Piezo electric transducers: transceiver: • Time of flight  distance = v * T • v = 1540 m/sec Receiver transmitter Distance = 12.5 mm mm Time of flight 9 sec

17. Theory of Operation • Piezo electric transducers: transceiver: • Time of flight  distance = v * T • v = 1540 m/sec Receiver transmitter Distance = 14 mm Time of flight 10 sec

18. Theory of Operation • Piezo electric transducers: transceiver: • Time of flight  distance = v * T • v = 1540 m/sec Receiver transmitter Distance = 15.5 mm Time of flight 11 sec

19. Theory of Operation • Piezo electric transducers: transceiver: • Time of flight  distance = v * T • v = 1540 m/sec Receiver transmitter Distance = 17.5 mm Time of flight 12 sec

20. Theory of Operation • Piezo electric transducers: transceiver: • Time of flight  distance = v * T • v = 1540 m/sec Receiver transmitter Distance = 17.5 mm Time of flight 12 sec

21. Theory of Operation • No crystal alignment required 1 • Ultrasonic pulses propagate in all directions • Ability to network with all others in array 2 6 5 3 4

22. base posterior anterior wall thickness segment shortening apex Sample Application – Ventricular Volume • Left ventricle

23. free wall septal posterior anterior free wall apex Sample Application – Ventricular Volume septum base anterior LV RV posterior

24. base posterior anterior Wall thickness apex Sample Application – Ventricular Volume Volume • Left ventricle ED ES Wall thickness Distance (mm) Segment shortening 15 10 Time

25. base Sample Application – Ventricular Volume t Volume • Left ventricle ED ES Wall thickness posterior anterior Distance (mm) wall thickness segment shortening 15 10 apex

26. base Sample Application – Ventricular Volume Volume • Left ventricle ED ES Wall thickness posterior anterior Distance (mm) wall thickness segment shortening 15 10 apex Time

27. base Sample Application – Ventricular Volume Volume • Left ventricle ED ES Wall thickness posterior anterior Distance (mm) wall thickness segment shortening 15 10 apex Time

28. base Sample Application – Ventricular Volume Volume Volume • Left ventricle ED ES Wall thickness Wall thickness posterior anterior Distance (mm) Distance (mm) wall thickness segment shortening 15 15 10 10 apex Time Time

29. base Sample Application – Ventricular Volume Volume Volume • Left ventricle ED ES Wall thickness Wall thickness posterior anterior Distance (mm) Distance (mm) wall thickness segment shortening 15 15 15 10 10 10 apex Time Time

30. base posterior anterior Wall thickness apex Sample Application – Ventricular Volume Volume Volume • Left ventricle ED ES Wall thickness Wall thickness Distance (mm) Distance (mm) Segment shortening 15 10 Time Time

31. base Sample Application – Ventricular Volume Volume Volume • Left ventricle ED ES Wall thickness Wall thickness posterior anterior Distance (mm) Distance (mm) wall thickness segment shortening 15 15 15 10 10 10 apex Time Time

32. base Sample Application – Ventricular Volume Volume Volume • Left ventricle ED ES Wall thickness Wall thickness posterior anterior Distance (mm) Distance (mm) wall thickness segment shortening 15 15 10 10 apex Time Time

33. base Sample Application – Ventricular Volume Volume Volume • Left ventricle ED ES Wall thickness Wall thickness posterior anterior Distance (mm) Distance (mm) wall thickness segment shortening 15 15 10 10 apex Time Time

34. base Sample Application – Ventricular Volume Volume Volume • Left ventricle ED ES Wall thickness Wall thickness posterior anterior Distance (mm) Distance (mm) wall thickness segment shortening 15 15 10 10 apex Time Time

35. base Sample Application – Ventricular Volume Volume Volume • Left ventricle ED ES Wall thickness Wall thickness posterior anterior Distance (mm) Distance (mm) wall thickness segment shortening 15 15 10 10 apex Time Time

36. base posterior anterior Wall thickness apex Sample Application – Ventricular Volume Volume Volume • Left ventricle ED ES Wall thickness Wall thickness Distance (mm) Distance (mm) Segment shortening 15 15 15 10 10 Time Time