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Finite-element analysis of temperature rise and lesion formation from catheter ultrasound ablation transducers.

Publication ,  Journal Article
Gentry, KL; Palmeri, ML; Sachedina, N; Smith, SW
Published in: IEEE transactions on ultrasonics, ferroelectrics, and frequency control
October 2005

A model using finite-element analysis (FEA) has been developed to calculate the temperature rise in tissue from intracardiac ultrasound ablation catheters and to predict if this temperature rise is adequate for producing a lesion in the tissue. In the model, acoustic fields are simulated with Field II, and heat transfer is modeled with an FEA program. To validate the model, we compare its results to experimental results from an integrated, real-time three-dimensional (3-D) ultrasound imaging and ultrasound ablation catheter. The ultrasound ablation transducer is a ring transmitting at 10 MHz capable of producing an acoustic intensity of 16 W/cm2. It was used to ablate four lesions in tissue, and temperature rise as a function of time was monitored by embedded thermocouples. The average absolute difference between final temperatures predicted by FEA and those measured is 1.95 +/- 0.72 degrees C. Additionally, model and experimental lesion size are in good agreement. The model then is used to design a new ultrasound catheter with a 7.5 MHz linear phased array for ablation. Eight designs are modeled, and acoustic intensity, temperature rise, and ablation ability are compared.

Duke Scholars

Published In

IEEE transactions on ultrasonics, ferroelectrics, and frequency control

DOI

EISSN

1525-8955

ISSN

0885-3010

Publication Date

October 2005

Volume

52

Issue

10

Start / End Page

1713 / 1721

Related Subject Headings

  • Ultrasonic Therapy
  • Treatment Outcome
  • Transducers
  • Thermography
  • Therapy, Computer-Assisted
  • Muscle, Skeletal
  • Models, Biological
  • In Vitro Techniques
  • Finite Element Analysis
  • Equipment Failure Analysis
 

Citation

APA
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ICMJE
MLA
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Gentry, K. L., Palmeri, M. L., Sachedina, N., & Smith, S. W. (2005). Finite-element analysis of temperature rise and lesion formation from catheter ultrasound ablation transducers. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 52(10), 1713–1721. https://doi.org/10.1109/tuffc.2005.1561625
Gentry, Kenneth L., Mark L. Palmeri, Nasheer Sachedina, and Stephen W. Smith. “Finite-element analysis of temperature rise and lesion formation from catheter ultrasound ablation transducers.IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 52, no. 10 (October 2005): 1713–21. https://doi.org/10.1109/tuffc.2005.1561625.
Gentry KL, Palmeri ML, Sachedina N, Smith SW. Finite-element analysis of temperature rise and lesion formation from catheter ultrasound ablation transducers. IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 2005 Oct;52(10):1713–21.
Gentry, Kenneth L., et al. “Finite-element analysis of temperature rise and lesion formation from catheter ultrasound ablation transducers.IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 52, no. 10, Oct. 2005, pp. 1713–21. Epmc, doi:10.1109/tuffc.2005.1561625.
Gentry KL, Palmeri ML, Sachedina N, Smith SW. Finite-element analysis of temperature rise and lesion formation from catheter ultrasound ablation transducers. IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 2005 Oct;52(10):1713–1721.

Published In

IEEE transactions on ultrasonics, ferroelectrics, and frequency control

DOI

EISSN

1525-8955

ISSN

0885-3010

Publication Date

October 2005

Volume

52

Issue

10

Start / End Page

1713 / 1721

Related Subject Headings

  • Ultrasonic Therapy
  • Treatment Outcome
  • Transducers
  • Thermography
  • Therapy, Computer-Assisted
  • Muscle, Skeletal
  • Models, Biological
  • In Vitro Techniques
  • Finite Element Analysis
  • Equipment Failure Analysis