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Combined 3D intracardiac echo and ultrasound ablation

Publication ,  Journal Article
Gentry, KL; Light, ED; Smith, SW
Published in: Proceedings of SPIE - The International Society for Optical Engineering
September 12, 2003

We have integrated real time volumetric ultrasound imaging and ultrasound ablation in the same intracardiac catheter. This single device could be used to visualize ablation sites in three dimensions immediately prior to inducing necrosis to eliminate cardiac arrythmias. After the course of therapy, the ablated tissue could be examined ultrasonically. The 12 Fr catheter includes a 2D transducer array for imaging and a single element piston for ablation. The imaging transducer consists of 38 active elements built on a multilayer flex circuit operating at 5.2 Mhz. The ablation piston is a 4 mm by 2 mm piece of air backed PZT-4. Our real time 3D scanner (Volumetrics Medical Imaging) and the 2D array were used to image phantom targets. The spatial peak, temporal average intensity (ISPTA) and acoustic power of the ablation beam were measured using a hydrophone. A 7 mm thick slab of beef was imaged and then ablated for 1 minute. The ultrasound ablation piston produced an ISFTA of nearly 30 W/cm2 and a corresponding acoustic power of 2.6 W. The electrical to acoustic power efficiency of the transducer was 39%. The minute long ablation produced a transmural lesion in the beef 2mm by 4 mm by 7 mm deep.

Duke Scholars

Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

ISSN

0277-786X

Publication Date

September 12, 2003

Volume

5035

Start / End Page

166 / 173

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering
 

Citation

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Gentry, K. L., Light, E. D., & Smith, S. W. (2003). Combined 3D intracardiac echo and ultrasound ablation. Proceedings of SPIE - The International Society for Optical Engineering, 5035, 166–173. https://doi.org/10.1117/12.479877
Gentry, K. L., E. D. Light, and S. W. Smith. “Combined 3D intracardiac echo and ultrasound ablation.” Proceedings of SPIE - The International Society for Optical Engineering 5035 (September 12, 2003): 166–73. https://doi.org/10.1117/12.479877.
Gentry KL, Light ED, Smith SW. Combined 3D intracardiac echo and ultrasound ablation. Proceedings of SPIE - The International Society for Optical Engineering. 2003 Sep 12;5035:166–73.
Gentry, K. L., et al. “Combined 3D intracardiac echo and ultrasound ablation.” Proceedings of SPIE - The International Society for Optical Engineering, vol. 5035, Sept. 2003, pp. 166–73. Scopus, doi:10.1117/12.479877.
Gentry KL, Light ED, Smith SW. Combined 3D intracardiac echo and ultrasound ablation. Proceedings of SPIE - The International Society for Optical Engineering. 2003 Sep 12;5035:166–173.

Published In

Proceedings of SPIE - The International Society for Optical Engineering

DOI

ISSN

0277-786X

Publication Date

September 12, 2003

Volume

5035

Start / End Page

166 / 173

Related Subject Headings

  • 5102 Atomic, molecular and optical physics
  • 4009 Electronics, sensors and digital hardware
  • 4006 Communications engineering