Ultrafast imaging in biomedical ultrasound

Tanter, Mickaël; Fink, Mathias

doi:10.1109/tuffc.2014.2882

Cited by 602 publications

(272 citation statements)

References 120 publications

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“…These approaches use PW to insonify the whole medium with one single emission. The backscattered echoes are then measured and post-processed to reconstruct simultaneously all lines of the image of interest [4]. The concept of broad field-ofview transmit beams with full parallel receive beamforming dates back to the late 90s, when Lu et al developed a high frame rate imaging method based on limited diffraction beams [5], [6].…”

Section: Introductionmentioning

confidence: 99%

Extension of Fourier-Based Techniques for Ultrafast Imaging in Ultrasound With Diverging Waves

Zhang

Varray

Besson

et al. 2016

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

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Abstract-Ultrafast ultrasound imaging has become an intensive area of research thanks to its capability in reaching high frame rates. In this paper, we propose a scheme which allows the extension of the current Fourier-based techniques derived for planar acquisition to the reconstruction of sectorial scan with wide angle using diverging waves. The flexibility of the proposed formulation was assessed through two different Fourierbased techniques. The performance of the derived approaches was evaluated in terms of resolution and contrast from both simulations and in vitro experiments. Comparisons with the current state-of-the-art method illustrated the potential of the derived methods in producing competitive results with lower computational complexity when compared to the conventional Delay-And-Sum technique.Index Terms-Ultrafast imaging, Fourier-based method, diverging waves.

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Section: Introductionmentioning

confidence: 99%

Extension of Fourier-Based Techniques for Ultrafast Imaging in Ultrasound With Diverging Waves

Zhang

Varray

Besson

et al. 2016

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

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“…Although measurement of fascicle-shortening velocity is classically performed using ultrasound (13), the sampling frequency of conventional devices (i.e., the number of images per second, typically 30 -170 Hz) limits the investigations to relatively slow motion, far from the maximal velocities reached during human movements. In this context, ultrafast ultrasound (14,55) could be used to overcome this limitation and analyze very fast movements (17,29,47). Using this technique, we measured fascicle-shortening velocity during maximal isokinetic plantar flexions performed at various submaximal preset angular velocities, from 30°/s up to 330°/s (29).…”

mentioning

confidence: 99%

In vivo maximal fascicle-shortening velocity during plantar flexion in humans

Hauraix

Nordez

Guilhem

et al. 2015

Journal of Applied Physiology

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Interindividual variability in performance of fast movements is commonly explained by a difference in maximal muscle-shortening velocity due to differences in the proportion of fast-twitch fibers. To provide a better understanding of the capacity to generate fast motion, this study aimed to 1) measure for the first time in vivo the maximal fascicle-shortening velocity of human muscle; 2) evaluate the relationship between angular velocity and fascicle-shortening velocity from low to maximal angular velocities; and 3) investigate the influence of musculo-articular features (moment arm, tendinous tissues stiffness, and muscle architecture) on maximal angular velocity. Ultrafast ultrasound images of the gastrocnemius medialis were obtained from 31 participants during maximal isokinetic and light-loaded plantar flexions. A strong linear relationship between fascicle-shortening velocity and angular velocity was reported for all subjects (mean R 2 ϭ 0.97). The maximal shortening velocity (V Fmax) obtained during the no-load condition (NLc) ranged between 18.8 and 43.3 cm/s. V Fmax values were very close to those of the maximal shortening velocity (V max), which was extrapolated from the F-V curve (the Hill model). Angular velocity reached during the NLc was significantly correlated with this V Fmax (r ϭ 0.57; P Ͻ 0.001). This finding was in agreement with assumptions about the role of muscle fiber type, whereas interindividual comparisons clearly support the fact that other parameters may also contribute to performance during fast movements. Nevertheless, none of the biomechanical features considered in the present study were found to be directly related to the highest angular velocity, highlighting the complexity of the upstream mechanics that lead to maximalvelocity muscle contraction. maximal unloaded velocity; muscle-tendon unit; muscle mechanics; muscle architecture; stiffness; ultrasound THE CAPACITY OF HUMAN SKELETAL muscle to achieve maximal power production is functionally very important during ballistic movements such as sprinting or jumping. The maximal angular velocity an individual can produce represents one of the key determinants of this ability and hence of human performance in various explosive tasks such as a sprint while running or cycling (31, 57). In the literature, this ability to reach extreme angular velocities in unloaded conditions is related mainly to a higher proportion of fast-twitch fibers (5, 11, 56) or a longer fascicle length, or both, which implies a higher number of sarcomeres in series (9, 53). These considerations suggest that subjects who are able to produce high velocity at the joint level should also be able to develop high muscle fascicle-shortening velocity. Consequently, the muscleshortening velocity should be a key determinant of the ability to perform very-high-velocity movements.To our knowledge, no previous study has measured actual maximal fascicle-shortening velocity in vivo in humans. Although measurement of fascicle-shortening velocity is classically performed using ul...

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“…Therefore, a high-speed monitoring method is necessary to detect cavitation bubbles before they dissolve quickly. A high-speed ultrasonic imaging using plane-wave transmission at a frame rate of thousands of frames/s [56] has been used to monitor residual cavitation microbubbles after the exposure of a high-intensity pulse [57,58]. The two studies showed that the .…”

Section: Lifetime Of Cavitaion During and After Hifu Exposurementioning

confidence: 99%

Enhancement of High-Intensity Focused Ultrasound Heating by Short-Pulse Generated Cavitation

2017

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Abstract:A target tissue can be thermally coagulated in high-intensity focused ultrasound (HIFU) treatment noninvasively. HIFU thermal treatments have been clinically applied to various solid tumors. One of the problems in HIFU treatments is a long treatment time. Acoustically driven microbubbles can accelerate the ultrasonic heating, resulting in the significant reduction of the treatment time. In this paper, a method named "trigger HIFU exposure" which employs cavitation microbubbles is introduced and its results are reviewed. A trigger HIFU sequence consists of high-intensity short pulses followed by moderate-intensity long bursts. Cavitation bubbles induced in a multiple focal regions by rapidly scanning the focus of high-intensity pulses enhanced the temperature increase significantly and produced a large coagulation region with high efficiency.

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Ultrafast imaging in biomedical ultrasound

Cited by 602 publications

References 120 publications

Extension of Fourier-Based Techniques for Ultrafast Imaging in Ultrasound With Diverging Waves

Extension of Fourier-Based Techniques for Ultrafast Imaging in Ultrasound With Diverging Waves

In vivo maximal fascicle-shortening velocity during plantar flexion in humans

Enhancement of High-Intensity Focused Ultrasound Heating by Short-Pulse Generated Cavitation

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