Optimization of a Phased-Array Transducer for Multiple Harmonic Imaging in Medical Applications: Frequency and Topology

Guillaume M. Matte, Paul L.M.J. van Neer, Mike G. Danilouchkine, Jacob Huijssen, Martin D. Verweij, N. de Jong

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

13 Citations (Scopus)

Abstract

Second-harmonic imaging is currently one of the standards in commercial echographic systems for diagnosis, because of its high spatial resolution and low sensitivity to clutter and near-field artifacts. The use of nonlinear phenomena mirrors is a great set of solutions to improve echographic image resolution. To further enhance the resolution and image quality, the combination of the 3rd to 5th harmonics - dubbed the superharmonics - could be used. However, this requires a bandwidth exceeding that of conventional transducers. A promising solution features a phased-array design with interleaved low- and high-frequency elements for transmission and reception, respectively. Because the amplitude of the backscattered higher harmonics at the transducer surface is relatively low, it is highly desirable to increase the sensitivity in reception. Therefore, we investigated the optimization of the number of elements in the receiving aperture as well as their arrangement (topology). A variety of configurations was considered, including one transmit element for each receive element (1/2) up to one transmit for 7 receive elements (1/8). The topologies are assessed based on the ratio of the harmonic peak pressures in the main and grating lobes. Further, the higher harmonic level is maximized by optimization of the center frequency of the transmitted pulse. The achievable SNR for a specific application is a compromise between the frequency-dependent attenuation and nonlinearity at a required penetration depth. To calculate the SNR of the complete imaging chain, we use an approach analogous to the sonar equation used in underwater acoustics. The generated harmonic pressure fields caused by nonlinear wave propagation were modeled with the iterative nonlinear contrast source (INCS) method, the KZK, or the Burger's equation. The optimal topology for superharmonic imaging was an interleaved design with 1 transmit element per 6 receive elements. It improves the SNR by ~5 dB compared wi- - th the interleaved (1/2) design reported in literature. The optimal transmit frequency for superharmonic echocardiography was found to be 1.0 to 1.2 MHz. For superharmonic abdominal imaging this frequency was found to be 1.7 to 1.9 MHz. For 2nd-harmonic echocardiography, the optimal transmit frequency of 1.8 MHz reported in the literature was corroborated with our simulation results
Original languageUndefined
Title of host publicationIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Place of PublicationPISCATAWAY
PublisherIEEE
Pages533-546
ISBN (Print)0885-3010
DOIs
Publication statusPublished - 2011

Publication series

Name3
PublisherIEEE
Number39
Volume58
ISSN (Print)0885-3010

Keywords

  • Imaging
  • METIS-275213
  • Topology
  • Harmonic analysis
  • Arrays
  • IR-79177
  • Transducers
  • Equations
  • Mathematical model

Cite this

Matte, G. M., van Neer, P. L. M. J., Danilouchkine, M. G., Huijssen, J., Verweij, M. D., & de Jong, N. (2011). Optimization of a Phased-Array Transducer for Multiple Harmonic Imaging in Medical Applications: Frequency and Topology. In IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control (pp. 533-546). (3; Vol. 58, No. 39). PISCATAWAY: IEEE. https://doi.org/10.1109/TUFFC.2011.1837
Matte, Guillaume M. ; van Neer, Paul L.M.J. ; Danilouchkine, Mike G. ; Huijssen, Jacob ; Verweij, Martin D. ; de Jong, N. / Optimization of a Phased-Array Transducer for Multiple Harmonic Imaging in Medical Applications: Frequency and Topology. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. PISCATAWAY : IEEE, 2011. pp. 533-546 (3; 39).
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title = "Optimization of a Phased-Array Transducer for Multiple Harmonic Imaging in Medical Applications: Frequency and Topology",
abstract = "Second-harmonic imaging is currently one of the standards in commercial echographic systems for diagnosis, because of its high spatial resolution and low sensitivity to clutter and near-field artifacts. The use of nonlinear phenomena mirrors is a great set of solutions to improve echographic image resolution. To further enhance the resolution and image quality, the combination of the 3rd to 5th harmonics - dubbed the superharmonics - could be used. However, this requires a bandwidth exceeding that of conventional transducers. A promising solution features a phased-array design with interleaved low- and high-frequency elements for transmission and reception, respectively. Because the amplitude of the backscattered higher harmonics at the transducer surface is relatively low, it is highly desirable to increase the sensitivity in reception. Therefore, we investigated the optimization of the number of elements in the receiving aperture as well as their arrangement (topology). A variety of configurations was considered, including one transmit element for each receive element (1/2) up to one transmit for 7 receive elements (1/8). The topologies are assessed based on the ratio of the harmonic peak pressures in the main and grating lobes. Further, the higher harmonic level is maximized by optimization of the center frequency of the transmitted pulse. The achievable SNR for a specific application is a compromise between the frequency-dependent attenuation and nonlinearity at a required penetration depth. To calculate the SNR of the complete imaging chain, we use an approach analogous to the sonar equation used in underwater acoustics. The generated harmonic pressure fields caused by nonlinear wave propagation were modeled with the iterative nonlinear contrast source (INCS) method, the KZK, or the Burger's equation. The optimal topology for superharmonic imaging was an interleaved design with 1 transmit element per 6 receive elements. It improves the SNR by ~5 dB compared wi- - th the interleaved (1/2) design reported in literature. The optimal transmit frequency for superharmonic echocardiography was found to be 1.0 to 1.2 MHz. For superharmonic abdominal imaging this frequency was found to be 1.7 to 1.9 MHz. For 2nd-harmonic echocardiography, the optimal transmit frequency of 1.8 MHz reported in the literature was corroborated with our simulation results",
keywords = "Imaging, METIS-275213, Topology, Harmonic analysis, Arrays, IR-79177, Transducers, Equations, Mathematical model",
author = "Matte, {Guillaume M.} and {van Neer}, {Paul L.M.J.} and Danilouchkine, {Mike G.} and Jacob Huijssen and Verweij, {Martin D.} and {de Jong}, N.",
year = "2011",
doi = "10.1109/TUFFC.2011.1837",
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isbn = "0885-3010",
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Matte, GM, van Neer, PLMJ, Danilouchkine, MG, Huijssen, J, Verweij, MD & de Jong, N 2011, Optimization of a Phased-Array Transducer for Multiple Harmonic Imaging in Medical Applications: Frequency and Topology. in IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 3, no. 39, vol. 58, IEEE, PISCATAWAY, pp. 533-546. https://doi.org/10.1109/TUFFC.2011.1837

Optimization of a Phased-Array Transducer for Multiple Harmonic Imaging in Medical Applications: Frequency and Topology. / Matte, Guillaume M.; van Neer, Paul L.M.J.; Danilouchkine, Mike G.; Huijssen, Jacob; Verweij, Martin D.; de Jong, N.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. PISCATAWAY : IEEE, 2011. p. 533-546 (3; Vol. 58, No. 39).

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

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AU - Matte, Guillaume M.

AU - van Neer, Paul L.M.J.

AU - Danilouchkine, Mike G.

AU - Huijssen, Jacob

AU - Verweij, Martin D.

AU - de Jong, N.

PY - 2011

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N2 - Second-harmonic imaging is currently one of the standards in commercial echographic systems for diagnosis, because of its high spatial resolution and low sensitivity to clutter and near-field artifacts. The use of nonlinear phenomena mirrors is a great set of solutions to improve echographic image resolution. To further enhance the resolution and image quality, the combination of the 3rd to 5th harmonics - dubbed the superharmonics - could be used. However, this requires a bandwidth exceeding that of conventional transducers. A promising solution features a phased-array design with interleaved low- and high-frequency elements for transmission and reception, respectively. Because the amplitude of the backscattered higher harmonics at the transducer surface is relatively low, it is highly desirable to increase the sensitivity in reception. Therefore, we investigated the optimization of the number of elements in the receiving aperture as well as their arrangement (topology). A variety of configurations was considered, including one transmit element for each receive element (1/2) up to one transmit for 7 receive elements (1/8). The topologies are assessed based on the ratio of the harmonic peak pressures in the main and grating lobes. Further, the higher harmonic level is maximized by optimization of the center frequency of the transmitted pulse. The achievable SNR for a specific application is a compromise between the frequency-dependent attenuation and nonlinearity at a required penetration depth. To calculate the SNR of the complete imaging chain, we use an approach analogous to the sonar equation used in underwater acoustics. The generated harmonic pressure fields caused by nonlinear wave propagation were modeled with the iterative nonlinear contrast source (INCS) method, the KZK, or the Burger's equation. The optimal topology for superharmonic imaging was an interleaved design with 1 transmit element per 6 receive elements. It improves the SNR by ~5 dB compared wi- - th the interleaved (1/2) design reported in literature. The optimal transmit frequency for superharmonic echocardiography was found to be 1.0 to 1.2 MHz. For superharmonic abdominal imaging this frequency was found to be 1.7 to 1.9 MHz. For 2nd-harmonic echocardiography, the optimal transmit frequency of 1.8 MHz reported in the literature was corroborated with our simulation results

AB - Second-harmonic imaging is currently one of the standards in commercial echographic systems for diagnosis, because of its high spatial resolution and low sensitivity to clutter and near-field artifacts. The use of nonlinear phenomena mirrors is a great set of solutions to improve echographic image resolution. To further enhance the resolution and image quality, the combination of the 3rd to 5th harmonics - dubbed the superharmonics - could be used. However, this requires a bandwidth exceeding that of conventional transducers. A promising solution features a phased-array design with interleaved low- and high-frequency elements for transmission and reception, respectively. Because the amplitude of the backscattered higher harmonics at the transducer surface is relatively low, it is highly desirable to increase the sensitivity in reception. Therefore, we investigated the optimization of the number of elements in the receiving aperture as well as their arrangement (topology). A variety of configurations was considered, including one transmit element for each receive element (1/2) up to one transmit for 7 receive elements (1/8). The topologies are assessed based on the ratio of the harmonic peak pressures in the main and grating lobes. Further, the higher harmonic level is maximized by optimization of the center frequency of the transmitted pulse. The achievable SNR for a specific application is a compromise between the frequency-dependent attenuation and nonlinearity at a required penetration depth. To calculate the SNR of the complete imaging chain, we use an approach analogous to the sonar equation used in underwater acoustics. The generated harmonic pressure fields caused by nonlinear wave propagation were modeled with the iterative nonlinear contrast source (INCS) method, the KZK, or the Burger's equation. The optimal topology for superharmonic imaging was an interleaved design with 1 transmit element per 6 receive elements. It improves the SNR by ~5 dB compared wi- - th the interleaved (1/2) design reported in literature. The optimal transmit frequency for superharmonic echocardiography was found to be 1.0 to 1.2 MHz. For superharmonic abdominal imaging this frequency was found to be 1.7 to 1.9 MHz. For 2nd-harmonic echocardiography, the optimal transmit frequency of 1.8 MHz reported in the literature was corroborated with our simulation results

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KW - METIS-275213

KW - Topology

KW - Harmonic analysis

KW - Arrays

KW - IR-79177

KW - Transducers

KW - Equations

KW - Mathematical model

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DO - 10.1109/TUFFC.2011.1837

M3 - Conference contribution

SN - 0885-3010

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EP - 546

BT - IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

PB - IEEE

CY - PISCATAWAY

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Matte GM, van Neer PLMJ, Danilouchkine MG, Huijssen J, Verweij MD, de Jong N. Optimization of a Phased-Array Transducer for Multiple Harmonic Imaging in Medical Applications: Frequency and Topology. In IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. PISCATAWAY: IEEE. 2011. p. 533-546. (3; 39). https://doi.org/10.1109/TUFFC.2011.1837