Low-cost parallelization of optical fiber based detectors for photoacoustic imaging

Bauer-Marschallinger, Johannes; Felbermayer, Karoline; Hochreiner, Armin; Grün, Hubert; Paltauf, Guenther; Burgholzer, Peter; Berer, Thomas

doi:10.1117/12.2002034

Cited by 11 publications

(11 citation statements)

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“…Ultrasonic signals have been demodulated using a self-made balanced photodetector, the high-frequency output of which was sampled with a 12-bit data acquisition device. A detailed explanation of the used photo-detector and electronics can be found in [3]. The polymer fiber detector has been scanned around the phantom on a circular path with a radius of 6 mm and photoacoustic signals have been acquired on 121 positions.…”

Section: Results For Real Measurement Datamentioning

confidence: 99%

“…In the practical implementation the spherical means are given only for a discrete number of centers z j ∈ ∂B R (0) yielding semi-discrete data similar to (2), (3). Formula (20) can easily be adapted to discrete or semi-discrete data yielding a filtered backprojection type reconstruction algorithm; compare [23,Section 4].…”

Section: Example Of a Sparsifying Temporal Transformmentioning

confidence: 99%

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A Novel Compressed Sensing Scheme for Photoacoustic Tomography

Sandbichler¹,

Krahmer²,

Berer³

et al. 2015

SIAM J. Appl. Math.

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Speeding up the data acquisition is one of the central aims to advance tomographic imaging. On the one hand, this reduces motion artifacts due to undesired movements, and on the other hand this decreases the examination time for the patient. In this article, we propose a new scheme for speeding up the data collection process in photoacoustic tomography. Our proposal is based on compressed sensing and reduces acquisition time and system costs while maintaining image quality. As measurement data we use random combinations of pressure values that we use to recover a complete set of pressure data prior to the actual image reconstruction. We obtain theoretical recovery guarantees for our compressed sensing scheme and support the theory by reconstruction results on simulated data as well as on experimental data.

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Section: Results For Real Measurement Datamentioning

confidence: 99%

Section: Example Of a Sparsifying Temporal Transformmentioning

confidence: 99%

A Novel Compressed Sensing Scheme for Photoacoustic Tomography

Sandbichler¹,

Krahmer²,

Berer³

et al. 2015

SIAM J. Appl. Math.

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“…Fiber-optics-based sensors provide additional advantages, compared with free-space-optics based methods, such as improved reliability and potentially lower cost [63, 75]. The working principle of optical fiber interferometer (OFI) based sensors is similar to that of the free-space-optics based ones; however, OFI based sensors detect optical phase changes from the ultrasound pressure induced refractive index changes in the optical fibers.…”

Section: Optical Ultrasound Detectors and Applicationsmentioning

confidence: 99%

Optical Detection of Ultrasound in Photoacoustic Imaging

Dong¹,

Sun²,

Zhang

2017

IEEE Trans. Biomed. Eng.

137

116

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Objective Photoacoustic (PA) imaging emerges as a unique tool to study biological samples based on optical absorption contrast. In PA imaging, piezoelectric transducers are commonly used to detect laser-induced ultrasonic waves. However, they typically lack adequate broadband sensitivity at ultrasonic frequency higher than 100 MHz while their bulky size and optically opaque nature cause technical difficulties in integrating PA imaging with conventional optical imaging modalities. To overcome these limitations, optical methods of ultrasound detection were developed and shown their unique applications in photoacoustic imaging. Methods We provide an overview of recent technological advances in optical methods of ultrasound detection and their applications in PA imaging. A general theoretical framework describing sensitivity, bandwidth, and angular responses of optical ultrasound detection is also introduced. Results Optical methods of ultrasound detection can provide improved detection angle and sensitivity over significantly extended bandwidth. In addition, its versatile variants also offer additional advantages, such as device miniaturization, optical transparency, mechanical flexibility, minimal electrical/mechanical crosstalk, and potential noncontact PA imaging. Conclusion The optical ultrasound detection methods discussed in this review and their future evolution may play an important role in photoacoustic imaging for biomedical study and clinical diagnosis.

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“…The high frequency output of the balanced photo detector, described in detail in [16], has a −3 dB bandwidth of 45 MHz, a gain of 97 dB at 10 MHz and is used for acquisition of the photoacoustic signals. To prevent the high gain amplifier from saturation due to low frequency disturbances, e.g.…”

Section: Detection Electronics and Controllermentioning

confidence: 99%

Non-contact photoacoustic imaging using a fiber based interferometer with optical amplification

Hochreiner

Bauer-Marschallinger

Burgholzer

et al. 2013

Biomed. Opt. Express

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In photoacoustic imaging the ultrasonic signals are usually detected by contacting transducers. For some applications contact with the tissue should be avoided. As alternatives to contacting transducers interferometric means can be used to acquire photoacoustic signals remotely. In this paper we report on non-contact three and two dimensional photoacoustic imaging using an optical fiber-based Mach-Zehnder interferometer. A detection beam is transmitted through an optical fiber network onto the surface of the specimen. Back reflected light is collected and coupled into the same optical fiber. To achieve a high signal/noise ratio the reflected light is amplified by means of optical amplification with an erbium doped fiber amplifier before demodulation. After data acquisition the initial pressure distribution is reconstructed by a Fourier domain reconstruction algorithm. We present remote photoacoustic imaging of a tissue mimicking phantom and on chicken skin.

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Low-cost parallelization of optical fiber based detectors for photoacoustic imaging

Cited by 11 publications

References 0 publications

A Novel Compressed Sensing Scheme for Photoacoustic Tomography

A Novel Compressed Sensing Scheme for Photoacoustic Tomography

Optical Detection of Ultrasound in Photoacoustic Imaging

Non-contact photoacoustic imaging using a fiber based interferometer with optical amplification

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