Crosstalk Effect in Medical Ultrasound Tomography Imaging

Opieliński, Krzysztof J.; Celmer, Mateusz; Bolejko, Romuald

doi:10.1109/acoustics.2018.8502426

Cited by 4 publications

(4 citation statements)

References 17 publications

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“…The neighboring elements "1", "-1", "2", "-2", "3" and "-3" are connected individually to a digital oscilloscope, displaying the parasitic voltage generated on each element (V i , i = 1,-1, 2,-2, 3, and -3). In the literature [11,14] the crosstalk level C (dB) is evaluated from the measurements using the relation (1):…”

Section: Crosstalk Measurementsmentioning

confidence: 99%

“…The major objective of ongoing and future research in this area is to optimize the electroacoustic performance of these transducers, to obtain a high image resolution for more reliable and safe diagnostics. For this purpose, several works investigate the crosstalk phenomenon, which decreases the performance of the ultrasonic transducer arrays [6][7][8][9][10][11][12][13][14]. Indeed, when one element of a transducer array is driven, it generates parasitic voltages and/or displacement fields on the passive neighboring elements, which affects the performance of these devices.…”

Section: Introductionmentioning

confidence: 99%

“…in presence of crosstalk, the main lobe is not obtained in the axial direction of the transducer array and several undesirable side lobes can be observed [15][16]. The crosstalk level in the ultrasonic transducer arrays is generally evaluated as the ratio between the parasitic voltages obtained on the passive neighboring elements and the excitation's amplitude applied to the active element [11,14]. In this definition, one element of the studied transducer array is electrically driven, while its neighboring elements are considered electrically in Open-Circuit (not grounded).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Investigation of the electrical limit conditions effects in piezoelectric transducer arrays utilized in medical imaging

et al. 2020

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Crosstalk is considered as an undesirable phenomenon disturbing the electromechanical behavior of the ultrasonic transducer arrays used in medical imaging applications. Indeed, when one element of a transducer array is excited, it generates parasitic voltages and/or displacement fields on the adjacent passive elements. Consequently, these interactions between elements decrease the array's electroacoustic performance, which affects the obtained image quality. To overcome the crosstalk's problem, several research works propose active cancellation techniques. In this case, the correction voltages are determined by considering the array's elements grounded, contrary to the conventional crosstalk's definition which considers the array elements in Open-Circuit. The novelty of this paper is in one hand the study of the electrical limit conditions' effects on the physical behavior of a piezoelectric transducer array radiating in a fluid medium (water). On the other hand, a displacement method is proposed to evaluate the crosstalk level when the array elements are grounded. The limitations of the proposed method are also discussed. For this purpose, a piezoelectric transducer array is firstly modeled using a Two-dimensional Finite Elements Method (FEM), when the array elements are not grounded (open-circuit). Then, the results are compared to those obtained when the neighboring elements are grounded (as in the case of the crosstalk's active cancellation techniques).Finally, measurements are realized on a fabricated transducer array vibrating in air medium and are successfully compared to the results predicted using FEM.

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Section: Crosstalk Measurementsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Investigation of the electrical limit conditions effects in piezoelectric transducer arrays utilized in medical imaging

et al. 2020

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“…The first one proposes improvements at the level of design and manufacture of the transducer arrays. It investigates the geometry and dimensions of the kerf filling material [19][20] particularly, the optimization of the front matching layers [21][22][23] and the improvement of the Printed Circuit Board (PCB) are utilized to connect the transducer array elements [24][25]. The second method is based on corrective electrical excitations applied to the array's elements to minimize the parasitic displacements and thus reducing crosstalk [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Experimental Characterization of A Piezoelectric Transducer Array Taking into Account Crosstalk Phenomenon

Bybi

Khouili

Granger

et al. 2020

Int. j. eng. technol. innov.

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Ultrasonic transducer arrays are generally composed of several piezoelectric elements arranged in 1D or 2D ways. Crosstalk is an undesirable phenomenon decreasing the performance of these devices. It generates parasitic displacements at the elements' radiating surfaces, which changes the directivity of the array. Furthermore, the transducer's displacement plays a critical role in terms of the focal area and transferred intensities. The objective of this paper is to characterize a piezoelectric array composed of seven-elements made of PZ 27 ceramic experimentally. It investigates the effects of the crosstalk phenomenon on the array's performance in particular. The results have shown that the array's elements vibrate mainly in thickness mode, but the displacement is not uniform along their length due to the contribution of a parasitic length mode. Moreover, the major parasitic displacements are obtained on the neighboring passive elements: about -7.3 dB, -11 dB, and -12 dB, on the first, the second, and the third elements, respectively.

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Effects of the electrical limit conditions on the electromechanical behavior of piezoelectric transducer arrays

Bybi

Ammar

Garoum

et al. 2020

2020 International Conference on Electrical and Information Technologies (ICEIT)

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Crosstalk Effect in Medical Ultrasound Tomography Imaging

Cited by 4 publications

References 17 publications

Investigation of the electrical limit conditions effects in piezoelectric transducer arrays utilized in medical imaging

Investigation of the electrical limit conditions effects in piezoelectric transducer arrays utilized in medical imaging

Experimental Characterization of A Piezoelectric Transducer Array Taking into Account Crosstalk Phenomenon

Effects of the electrical limit conditions on the electromechanical behavior of piezoelectric transducer arrays

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