Deep Learning Enhances Multiparametric Dynamic Volumetric Photoacoustic Computed Tomography In Vivo (DL‐PACT)
Sign Up to like & getrecommendations! Published in 2022 at "Advanced Science"
DOI: 10.1002/advs.202202089
Abstract: Photoacoustic computed tomography (PACT) has become a premier preclinical and clinical imaging modality. Although PACT's image quality can be dramatically improved with a large number of ultrasound (US) transducer elements and associated multiplexed data acquisition… read more here.
Keywords: dynamic volumetric; computed tomography; multiparametric dynamic; pact ... See more keywords
Randomized multi‐angle illumination for improved linear array photoacoustic computed tomography in brain
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Biophotonics"
DOI: 10.1002/jbio.202200016
Abstract: One of the key challenges in linear array transducer‐based photoacoustic computed tomography is to image structures embedded deep within the biological tissue with limited optical energy. Here, we utilized a manually controlled multi‐angle illumination technique… read more here.
Keywords: computed tomography; multi angle; photoacoustic computed; linear array ... See more keywords
Massively parallel functional photoacoustic computed tomography of the human brain.
Sign Up to like & getrecommendations! Published in 2021 at "Nature biomedical engineering"
DOI: 10.1038/s41551-021-00735-8
Abstract: Blood-oxygen-level-dependent (BOLD) functional magnetic resonance imaging of the human brain requires bulky equipment for the generation of magnetic fields. Photoacoustic computed tomography obviates the need for magnetic fields by using light and sound to measure… read more here.
Keywords: computed tomography; massively parallel; human brain; photoacoustic computed ... See more keywords
Internal-illumination photoacoustic computed tomography.
Sign Up to like & getrecommendations! Published in 2018 at "Journal of biomedical optics"
DOI: 10.1117/1.jbo.23.3.030506
Abstract: We report a photoacoustic computed tomography (PACT) system using a customized optical fiber with a cylindrical diffuser to internally illuminate deep targets. The traditional external light illumination in PACT usually limits the penetration depth to… read more here.
Keywords: computed tomography; illumination; photoacoustic computed; pact ... See more keywords
Photoacoustic computed tomography of human extremities
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Biomedical Optics"
DOI: 10.1117/1.jbo.24.2.026003
Abstract: Abstract. We present a method of imaging angiographic structures in human extremities, including hands, arms, legs, and feet, using a newly developed photoacoustic computed tomography (PACT) system. The system features deep penetration (1.8 cm in… read more here.
Keywords: tomography human; system; photoacoustic computed; human extremities ... See more keywords
Multi-segmented feature coupling for jointly reconstructing initial pressure and speed of sound in photoacoustic computed tomography
Sign Up to like & getrecommendations! Published in 2022 at "Journal of Biomedical Optics"
DOI: 10.1117/1.jbo.27.7.076001
Abstract: Abstract. Significance: Photoacoustic computed tomography (PACT) is a fast-growing imaging modality. In PACT, the image quality is degraded due to the unknown distribution of the speed of sound (SoS). Emerging initial pressure (IP) and SoS… read more here.
Keywords: speed sound; method; computed tomography; feature ... See more keywords
Graphics processing unit accelerating compressed sensing photoacoustic computed tomography with total variation.
Sign Up to like & getrecommendations! Published in 2020 at "Applied optics"
DOI: 10.1364/ao.378466
Abstract: Photoacoustic computed tomography with compressed sensing (CS-PACT) is a commonly used imaging strategy for sparse-sampling PACT. However, it is very time-consuming because of the iterative process involved in the image reconstruction. In this paper, we… read more here.
Keywords: graphics processing; computed tomography; compressed sensing; photoacoustic computed ... See more keywords
Co-optimization method to improve lateral resolution in photoacoustic computed tomography
Sign Up to like & getrecommendations! Published in 2022 at "Biomedical Optics Express"
DOI: 10.1364/boe.469744
Abstract: In biomedical imaging, photoacoustic computed tomography (PACT) has recently gained increased interest as this imaging technique has good optical contrast and depth of acoustic penetration. However, a spinning blur will be introduced during the image… read more here.
Keywords: method; computed tomography; pact; resolution ... See more keywords
Photoacoustic computed tomography by using a multi-angle scanning fiber-laser ultrasound sensor.
Sign Up to like & getrecommendations! Published in 2020 at "Optics express"
DOI: 10.1364/oe.387675
Abstract: Photoacoustic computed tomography (PACT) can ultrasonically image optical absorbers in biological tissues by using a linear piezoelectric transducer array, but some features can not be visualized as a result of the limited acceptance angle. The… read more here.
Keywords: angle; computed tomography; photoacoustic computed; fiber laser ... See more keywords
Sparsity-based reconstruction for super-resolved limited-view photoacoustic computed tomography deep in a scattering medium.
Sign Up to like & getrecommendations! Published in 2018 at "Optics letters"
DOI: 10.1364/ol.43.002221
Abstract: Delay-and-sum beamforming (DSB) of photoacoustic data does not incorporate a priori spatial sparsity of the imaging target. By incorporating this information into beamforming for limited-view photoacoustic computed tomography, we experimentally obtained enhanced resolution images of… read more here.
Keywords: computed tomography; scattering medium; view photoacoustic; limited view ... See more keywords
The influences of finite aperture size in photoacoustic computed tomography.
Sign Up to like & getrecommendations! Published in 2023 at "Ultrasonics"
DOI: 10.2139/ssrn.4353976
Abstract: In photoacoustic computed tomography (PACT), the "finite aperture effect" is often characterized as a tangential resolution that increases proportionally with the distance from the rotation center. However, this conclusion is based on the inaccurate point-detector… read more here.
Keywords: aperture; computed tomography; photoacoustic computed; aperture size ... See more keywords