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Enhancing Velocity Imaging Using Phased Arrays for Diagnostic Applications

Explore the use of phased array technology for transverse oscillation vector velocity imaging. Understand the principles of TO setup, simulation results, and its clinical potential for diagnosing heart conditions and vascular issues.

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Enhancing Velocity Imaging Using Phased Arrays for Diagnostic Applications

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  1. Using Phased Array for Transverse OscillationVector Velocity Imaging Michael Johannes Pihl1, Per Haugaard2, and Jørgen Arendt Jensen1 1 Center for Fast Ultrasound Imaging, Building 349 Department of Electrical Engineering Technical University of Denmark 2Bk Medical, Mileparken 34, 2730 Herlev Denmark EUROSON 2010 Copenhagen, August 22nd-25th, 2010

  2. Recap from previous talks • Vector velocity imaging • Shallow depths (< 3-4 cm) QUESTIONS: Can we get further down? Can we scan the heart?

  3. Outline • Simple principle • TO setup for phased array • Simulation setup • Simulation results • Conclusion

  4. Axial direction Transverse direction Principle of transverse oscillation (TO)

  5. Principle of transverse oscillation (TO)

  6. TO beamforming

  7. Phased array Image area TO lines Phased array setup • 2 TO lines • Fixed angle • >Spacing increases

  8. Simulation tool

  9. Simulation setup Transducer (Phased array) Elements 128 Pitch 0.220 mm Center freq. 3.5 MHz System Pulse rep. freq. 5 kHz No. shots per est. 64 Blood Angle 90 degrees Speed 1 m/s Radius 5 mm

  10. Simulation results • 10 cm 20 realizations Relative bias: 2.6% Relative std: 6.5%

  11. Simulation results • 15 cm 20 realizations Relative bias: 4.2% Relative std: 8.5%

  12. Conclusion and perspectives • In simulation: Measure velocities at to 10-15 cm • Potential for getting that far down in clinical in-vivo measurements • Clinical perspectives • Insufficient heart valves • AAAs • Further development • Through simulations • Through measurements • 3D vector velocity imaging

  13. Acknowledgements This work was supported by the Advanced Technology Foundation and B-K Medical Aps.

  14. Thank you for your attention Questions?

  15. Clinical potential • Vector velocity imaging • Insufficient valves (in the heart) • Abdominal aortic aneurisms • Portal vein • Renal artery • Multigating • Velocity and angle at every pixel • Develop new quantitative measures

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