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On the thermal effects associated with radiation force imaging of soft tissue.

Publication ,  Journal Article
Palmeri, ML; Nightingale, KR
Published in: IEEE transactions on ultrasonics, ferroelectrics, and frequency control
May 2004

Several laboratories are investigating the use of acoustic radiation force to image the mechanical properties of tissue. Acoustic Radiation Force Impulse (ARFI) imaging is one approach that uses brief, high-intensity, focused ultrasound pulses to generate radiation force in tissue. This radiation force generates tissue displacements that are tracked using conventional correlation-based ultrasound methods. The tissue response provides a mechanism to discern mechanical properties of the tissue. The acoustic energy that is absorbed by tissue generates radiation force and tissue heating. A finite element methods model of acoustic heating has been developed that models the thermal response of different tissues during short duration radiation force application. The beam sequences and focal configurations used during ARFI imaging are modeled herein; the results of these thermal models can be extended to the heating due to absorption associated with other radiation force-based imaging modalities. ARFI-induced thermal diffusivity patterns are functions of the transducer f-number, the tissue absorption, and the temporal and spatial spacing of adjacent ARFI interrogations. Cooling time constants are on the order of several seconds. Tissue displacement due to thermal expansion is negligible for ARFI imaging. Changes in sound speed due to temperature changes can be appreciable. These thermal models demonstrate that ARFI imaging of soft tissue is safe, although thermal response must be monitored when ARFI beam sequences are being developed.

Duke Scholars

Published In

IEEE transactions on ultrasonics, ferroelectrics, and frequency control

EISSN

1525-8955

ISSN

0885-3010

Publication Date

May 2004

Volume

51

Issue

5

Start / End Page

551 / 565

Related Subject Headings

  • Ultrasonography
  • Ultrasonics
  • Thermography
  • Thermal Conductivity
  • Radiation Dosage
  • Models, Biological
  • Humans
  • Hot Temperature
  • Finite Element Analysis
  • Energy Transfer
 

Citation

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ICMJE
MLA
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Palmeri, M. L., & Nightingale, K. R. (2004). On the thermal effects associated with radiation force imaging of soft tissue. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 51(5), 551–565.
Palmeri, Mark L., and Kathryn R. Nightingale. “On the thermal effects associated with radiation force imaging of soft tissue.IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control 51, no. 5 (May 2004): 551–65.
Palmeri ML, Nightingale KR. On the thermal effects associated with radiation force imaging of soft tissue. IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 2004 May;51(5):551–65.
Palmeri, Mark L., and Kathryn R. Nightingale. “On the thermal effects associated with radiation force imaging of soft tissue.IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 51, no. 5, May 2004, pp. 551–65.
Palmeri ML, Nightingale KR. On the thermal effects associated with radiation force imaging of soft tissue. IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 2004 May;51(5):551–565.

Published In

IEEE transactions on ultrasonics, ferroelectrics, and frequency control

EISSN

1525-8955

ISSN

0885-3010

Publication Date

May 2004

Volume

51

Issue

5

Start / End Page

551 / 565

Related Subject Headings

  • Ultrasonography
  • Ultrasonics
  • Thermography
  • Thermal Conductivity
  • Radiation Dosage
  • Models, Biological
  • Humans
  • Hot Temperature
  • Finite Element Analysis
  • Energy Transfer