A Phased Array System for the Acquisition of Ultrasonic RF-Data up to 20 MHZ

Weber, P. K.; Fonfara, Heinrich; Welsch, H.-J.; Schmitt, Daniel; Günther, Christian

doi:10.1007/978-1-4020-2402-3_4

Cited by 6 publications

(4 citation statements)

References 1 publication

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“…For this system, plane wave could be emitted in the kilohertz range for ultrafast imaging and data could be stored in the 2-MB memory for each of the channels making it possible to acquire 200–300 RF data sets. The Fraunhofer Institute developed the DiPhAS phased array system capable of real-time processing of 64 channel data [51] . Bipolar TX is performed at a 120-MHz sampling frequency and the received data are sampled at 12 bits.…”

Section: Historical Review Of Ultrasound Open Platformsmentioning

confidence: 99%

Ultrasound Open Platforms for Next-Generation Imaging Technique Development

Boni

Freear

et al. 2018

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

118

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Open platform (OP) ultrasound systems are aimed primarily at the research community. They have been at the forefront of the development of synthetic aperture, plane wave, shear wave elastography, and vector flow imaging. Such platforms are driven by a need for broad flexibility of parameters that are normally preset or fixed within clinical scanners. OP ultrasound scanners are defined to have three key features including customization of the transmit waveform, access to the prebeamformed receive data, and the ability to implement real-time imaging. In this paper, a formative discussion is given on the development of OPs from both the research community and the commercial sector. Both software- and hardware-based architectures are considered, and their specifications are compared in terms of resources and programmability. Software-based platforms capable of real-time beamforming generally make use of scalable graphics processing unit architectures, whereas a common feature of hardware-based platforms is the use of field-programmable gate array and digital signal processor devices to provide additional on-board processing capacity. OPs with extended number of channels (>256) are also discussed in relation to their role in supporting 3-D imaging technique development. With the increasing maturity of OP ultrasound scanners, the pace of advancement in ultrasound imaging algorithms is poised to be accelerated.

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Section: Historical Review Of Ultrasound Open Platformsmentioning

confidence: 99%

Ultrasound Open Platforms for Next-Generation Imaging Technique Development

Boni

Freear

et al. 2018

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

118

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“…In general, ultrasonic imaging or measurement systems [21]- [23] structure can be analysed as presented in Fig. 1.…”

Section: Measurement Techniquementioning

confidence: 99%

“…This data, together with output impedance, can be used for errors ( Fig. 24) analysis using (1)- (23). Analysis was also used to calculate the optimum RL and RH values.…”

Section: B Errors Analysismentioning

confidence: 99%

“…As the piezoelectric effect is assumed to be reciprocal transducer input impedance can be measured and then, assuming this reciprocity, it can be used as output impedance. Commercial impedance analysers are not always available; on a contrary, ultrasonic data acquisition systems [21]- [23] are more likely to be available in the case of ultrasonic non-destructive testing or imaging applications. Paper presents a technique for transducer output impedance measurement using conventional ultrasonic data acquisition systems.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ultrasonic Air Coupled Transducer Output Impedance Measurement Technique

Svilainis¹,

Chaziachmetovas²,

Álvarez-Arenas³

2019

ElAEE

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Estimation of the output impedance of ultrasonic transducers is required for electrical matching circuits design and for receiving amplifiers noise optimization. This paper presents a simple technique for transducer output impedance estimation using the same data acquisition system and signals that are conventionally used in non-destructive testing. A pair of ultrasonic transducers is used: one for transmission, one for reception. Received signal is recorded under low and high resistance load and transducer output impedance is then obtained from these two signals. Hence, this technique requires only one measurement channel and bias errors are low (no need for calibration). In addition, it is ground referenced and does not require the transducer to be removed from the positioning fixture. Experimental results obtained using different probing signals have been compared against conventional measurements obtained by an impedance analyser.

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Deconvolution of Medical Ultrasound Data with Consideration of the Pressure Field, the Excitation Pulse and Focussing

Hewener

Lemor

Springer Proceedings in Physics

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A Phased Array System for the Acquisition of Ultrasonic RF-Data up to 20 MHZ

Cited by 6 publications

References 1 publication

Ultrasound Open Platforms for Next-Generation Imaging Technique Development

Ultrasound Open Platforms for Next-Generation Imaging Technique Development

Ultrasonic Air Coupled Transducer Output Impedance Measurement Technique

Deconvolution of Medical Ultrasound Data with Consideration of the Pressure Field, the Excitation Pulse and Focussing

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