2016
DOI: 10.1088/2040-8978/18/2/024005
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Gas-coupled laser acoustic detection as a non-contact line detector for photoacoustic and ultrasound imaging

Abstract: Increasing the imaging speed is a central aim in photoacoustic tomography. This issue is especially important in the case of sequential scanning approaches as applied for most existing optical detection schemes. In this work we address this issue using techniques of compressed sensing. We demonstrate, that the number of measurements can significantly be reduced by allowing general linear measurements instead of point-wise pressure values. A main requirement in compressed sensing is the sparsity of the unknowns… Show more

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Cited by 28 publications
(26 citation statements)
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“…The PBDT correlates the deflection of a laser beam propagating through a media of interest with any detectable thermal or acoustic disturbance in the media. This technique has been utilized extensively in the past, for ultrasound and photoacoustic measurement, as well as imaging [17][18][19][20][21]. The technique has been applied to the measurement of acoustic waves in gas phase, namely the gas coupled laser acoustic detector (GCLAD), where detection bandwidth is limited by the speed of sound in air [20,21].…”
Section: Probe Beam Deflection Technique (Pbdt)mentioning
confidence: 99%
“…The PBDT correlates the deflection of a laser beam propagating through a media of interest with any detectable thermal or acoustic disturbance in the media. This technique has been utilized extensively in the past, for ultrasound and photoacoustic measurement, as well as imaging [17][18][19][20][21]. The technique has been applied to the measurement of acoustic waves in gas phase, namely the gas coupled laser acoustic detector (GCLAD), where detection bandwidth is limited by the speed of sound in air [20,21].…”
Section: Probe Beam Deflection Technique (Pbdt)mentioning
confidence: 99%
“…The review paper is followed by several papers describing a wide range of imaging methods and novel devices. They include a highly sensitive magneto-motive photoacoustic and ultrasound imaging method [2], a new parallel acoustic delay line array for real-time photoacoustic tomography [3], a gas-coupled laser acoustic detection method for both photoacoustic and ultrasound imaging [4], a forward-viewing photoacoustic imaging probe for endoscopic diagnosis [5]. Compressed sensing and sparsity in photoacoustic tomography is investigated in [6].…”
Section: Special Issue On Optoacoustic Imaging and Sensingmentioning
confidence: 99%
“…However, this approach requires two lasers for pumping and probing and a large footprint area for the set up because the probe beam needs to travel a relatively long distance (for increasing deflection angle) before detection to improve sensitivity. 31,32 There are also other air-coupled transducers available, but air-coupled transducers are unfocused, bulky, and exhibit poor SNR, which makes imaging more complicated. 33 Conventional PA imaging systems require expensive ultrafast lasers with nanosecond pulse widths, an ultrasound transducer (or optical-based ultrasound detection), and an aqueous coupling medium for the PA waves to propagate through.…”
Section: Introductionmentioning
confidence: 99%