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Integrated catheter for 3-D intracardiac echocardiography and ultrasound ablation

Publication ,  Journal Article
Gentry, KL; Smith, SW
Published in: Proceedings of the IEEE Ultrasonics Symposium
December 1, 2003

We present an integrated catheter for 3-D intracardiac echocardiography and ultrasound ablation. The device uses a 9 Fr (3 mm O.D.) catheter lumen with a 14 Fr (4.7 mm O.D.) tip. Real-time 3D imaging is achieved with a forward-looking 112 element, 5 MHz two-dimensional array built on a multi-layer flexible interconnect circuit. Transducer elements typically showed a 21% bandwidth and a pulse-echo insertion loss of 80 dB. The imaging array, attached to our real-time 3-D scanner, was used to image tissue phantoms and a fixed sheep heart. The ablation transducer is a ring of 10 MHz PZT-4 placed around the imaging array. The ring has a 4.5 mm O.D. and a 3.1 mm I.D. for a total area of 33.4 mm 2. Using a hydrophone, the spatial-peak, temporal-average intensity of the ablation ring was measured at a maximum of 500 cycles per burst and a PRF of 10.3 kHz to be 16.1 W/cm 2. The ablation ring was then used to heat tissue-mimicking rubber with absorption comparable to tissue. A temperature rise of 14°C was recorded. In our final experiment, the imaging array was used to view a 1 cm thick piece of beef muscle with a 12 mm hole. The ablation ring was then used to create a lesion adjacent to the hole.

Duke Scholars

Published In

Proceedings of the IEEE Ultrasonics Symposium

ISSN

1051-0117

Publication Date

December 1, 2003

Volume

2

Start / End Page

1099 / 1102
 

Citation

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Gentry, K. L., & Smith, S. W. (2003). Integrated catheter for 3-D intracardiac echocardiography and ultrasound ablation. Proceedings of the IEEE Ultrasonics Symposium, 2, 1099–1102.
Gentry, K. L., and S. W. Smith. “Integrated catheter for 3-D intracardiac echocardiography and ultrasound ablation.” Proceedings of the IEEE Ultrasonics Symposium 2 (December 1, 2003): 1099–1102.
Gentry KL, Smith SW. Integrated catheter for 3-D intracardiac echocardiography and ultrasound ablation. Proceedings of the IEEE Ultrasonics Symposium. 2003 Dec 1;2:1099–102.
Gentry, K. L., and S. W. Smith. “Integrated catheter for 3-D intracardiac echocardiography and ultrasound ablation.” Proceedings of the IEEE Ultrasonics Symposium, vol. 2, Dec. 2003, pp. 1099–102.
Gentry KL, Smith SW. Integrated catheter for 3-D intracardiac echocardiography and ultrasound ablation. Proceedings of the IEEE Ultrasonics Symposium. 2003 Dec 1;2:1099–1102.

Published In

Proceedings of the IEEE Ultrasonics Symposium

ISSN

1051-0117

Publication Date

December 1, 2003

Volume

2

Start / End Page

1099 / 1102