Piezocomposite 30MHz linear array for medical imaging: design challenges and performances evaluation of a 128 elements array

Michau, S.; Mauchamp, P.; Dufait, R.

doi:10.1109/ultsym.2004.1417880

Cited by 36 publications

(28 citation statements)

References 5 publications

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“…although piezoelectric materials are typically not flexible, piezo-composites, which consist of a matrix of piezoelectric elements embedded into a relatively soft epoxy, typically are flexible and can be geometrically shaped [4], [5]. Using a piezo-composite material as the transducer substrate can be particularly advantageous when generating the elevation focusing in linear-array transducers [6].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and performance of high-frequency composite transducers with triangular-pillar geometry

Brown

Chérin

Yin

et al. 2009

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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A single-element, 40-MHz, 3-mm diameter transducer was fabricated with a geometric focus at 9 mm. The transducer was based on a piezo-composite substrate with triangular-shaped composite pillars. The 2-way bandwidth of 50% and impedance magnitude were in agreement with that predicted using finite-element modeling. A one-way radiation pattern was collected using a needle hydrophone. The one-way -3 dB beamwidth at the geometric focus was measured to be 120 microm and the -3 dB depth of field was 2.5 mm. This is in good agreement with the theoretical predictions of 112.5 microm and 2.4 mm. The triangular-pillar composite transducer was then compared with a transducer with square composite pillars with similar volume fraction of active ceramic. A 9.5 dB reduction in the amplitude of the secondary resonance was found for the triangular-pillar composite as well as a 30% gain in the 2-way pulse bandwidth. A 256-element 30-MHz linear array was fabricated as a preliminary investigation into the use of the triangular pillar as the substrate in a high-frequency linear array transducer. In vivo images were generated with both the single-element and linear-array transducers.

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Section: Introductionmentioning

confidence: 99%

Fabrication and performance of high-frequency composite transducers with triangular-pillar geometry

Brown

Chérin

Yin

et al. 2009

IEEE Trans. Ultrason., Ferroelect., Freq. Contr.

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“…Ultrasonic detection was based on two 128-element ultrasound arrays operating in tandem: one low frequency (6 MHz center frequency, 300 μm inter-element pitch, 4 mm element height, Acuson L7, Siemens Healthcare) and one high frequency (24 MHz center frequency, an average pulse-echo −6 dB bandwidth of 60%, 70 μm inter-element pitch, 1.5 mm element height, Vermon [14]). The elements were cylindrically focused in the transverse dimension using acoustic lenses, at focal length of ~19 mm and ~7.5 mm, respectively.…”

Section: Optoacoustic Experimental Setupmentioning

confidence: 99%

“…Single detector implementation at 15 MHz [10] only captured a ~7 MHz spectral band (11)(12)(13)(14)(15)(16)(17)(18) MHz) at a significantly lower spatialfrequency range. The overall imaging ability of this original 15 MHz implementation suffered from insufficient aperture along the coronal dimension, lower resolution than the 2B-MSOM system and formed only single-plane two-dimensional images.…”

Section: Frequency Dependent Compartmental Study Of Agent Distributionmentioning

confidence: 99%

Optical mesoscopy without the scatter: broadband multispectral optoacoustic mesoscopy

Chekkoury

Gâteau

Driessen

et al. 2015

Biomed. Opt. Express

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Optical mesoscopy extends the capabilities of biological visualization beyond the limited penetration depth achieved by microscopy. However, imaging of opaque organisms or tissues larger than a few hundred micrometers requires invasive tissue sectioning or chemical treatment of the specimen for clearing photon scattering, an invasive process that is regardless limited with depth. We developed previously unreported broadband optoacoustic mesoscopy as a tomographic modality to enable imaging of optical contrast through several millimeters of tissue, without the need for chemical treatment of tissues. We show that the unique combination of three-dimensional projections over a broad 500 kHz-40 MHz frequency range combined with multi-wavelength illumination is necessary to render broadband multispectral optoacoustic mesoscopy (2B-MSOM) superior to previous optical or optoacoustic mesoscopy implementations.

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“…Most of the work reported in the literature on the integration of ultrasound transducer arrays in needle probes achieved separate element interconnections on sets of discrete pads that are distributed on dedicated interconnection structures extending well outside the transducer area (Ritter et al 2002;Michau et al 2004;Lukacs et al 2006;Brown et al 2007;Bernassau et al 2012;Bezanson et al 2012). This type of packaging can be implemented by using standard techniques such as wire bonding for the electrical interconnections.…”

Section: Introductionmentioning

confidence: 99%

A highly compact packaging concept for ultrasound transducer arrays embedded in neurosurgical needles

Schiavone¹,

Jones

Price

et al. 2016

Microsyst Technol

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packaging scheme that uses a thin flexible printed circuit board (PCB) wound inside a surgical needle. The flexible PCB is connected to a probe at the tip of the needle by means of magnetically aligned anisotropic conductive paste. This bonding technology offers higher compactness compared to conventional wire bonding, as the individual electrical connections are isolated from one another within the volume of the paste line, and applies a reduced thermal load compared to thermo-compression or eutectic packaging techniques. The reduction in the volume required for the interconnection allows for denser wiring of ultrasound probes within interventional tools. This allows the integration of arrays with higher element counts in confined packages, potentially enabling multi-modality imaging with Raman, OCT, and impediography. Promising experimental results and a prototype needle assembly are presented to demonstrate the viability of the proposed packaging scheme. The progress reported in this work are steps towards the production of fully-functional imaging-enabled needles that can be used as surgical guidance tools.

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Piezocomposite 30MHz linear array for medical imaging: design challenges and performances evaluation of a 128 elements array

Cited by 36 publications

References 5 publications

Fabrication and performance of high-frequency composite transducers with triangular-pillar geometry

Fabrication and performance of high-frequency composite transducers with triangular-pillar geometry

Optical mesoscopy without the scatter: broadband multispectral optoacoustic mesoscopy

A highly compact packaging concept for ultrasound transducer arrays embedded in neurosurgical needles

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