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Showing 1 to 20 of 124 for “"photoacoustic"”.
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Optical-Resolution Photoacoustic Microscopy
… fully assessable. The emergence of biomedical photoacoustics has led to a new branch of optical microscopy--OR-PAM. As a valuable complement to existing optical microscopy technologies, OR-PAM detects optical absorption contrasts with exquisite sensitivity: i.e., 100%). Combining OR-PAM with …
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Multi-contrast Photoacoustic Microscopy
<p>Photoacoustic microscopy is a hybrid imaging modality with high spatial resolution, moderate imaging depth, excellent imaging contrast and functional imaging capability. Taking full advantage of this powerful weapon, we have investigated different anatomical, functional, flow dynamic and …
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Photoacoustic Microscopy and Photoacoustic Computed Tomography Using High-frequency Linear Array Ultrasonic Transducers
<p>Photoacoustic tomography (PAT) is a highly promising imaging technology which forms images by detecting the induced pressure waves resulting from pulsed light absorption in biological tissues. Because the excitation source is light, PAT is a very safe, non-ionizing, and non-carcinogenic imaging …
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Photoacoustic analysis of wheat kernels
Call number: LD2668 .T4 1986 E34
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Photoacoustic analysis of wheat kernels
Call number: LD2668 .T4 1986 E34
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Novel contrasts in photoacoustic tomography
<p>Photoacoustic tomography (PAT) combines rich optical contrast and high ultrasonic resolution in optically scattering tissue at depths. Taking advantage of its 100% sensitivity to optical absorption, PAT has been widely applied to structural, functional and molecular imaging, with both endogenous …
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Computational Techniques for Advancing Photoacoustic Microscopy
<p>Photoacoustic microscopy (PAM), a hybrid modality that combines optical excitation and ultrasonic detection, has attracted considerable attention in basic and translational research. PAM not only enables in vivo label-free vascular imaging at the microscopic level, but also facilitates the …
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Quantification and Reconstruction in Photoacoustic Tomography
… the method using the optical-resolution photoacoustic microscopy: OR-PAM) and the acoustical-resolution photoacoustic microscopy: AR-PAM) in the optical ballistic regime and in the optical diffusive regime, respectively. The data acquisition speed in photoacoustic computed tomography: …
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Dual-modality thermoacoustic and photoacoustic imaging
… The combined contrasts from thermoacoustic and photoacoustic tomography: TAT and PAT) can potentially predict early stage breast cancer. We have designed and engineered a breast imaging system integrating both thermoacoustic and photoacoustic imaging techniques to achieve dual-contrast: …
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High-Speed Photoacoustic Microscopy In Vivo
… goal of this research is to develop a novel photoacoustic microscopy: PAM) technology capable of high-speed, high-resolution 3D imaging in vivo. PAM combines the advantages of optical absorption contrast and ultrasonic resolution for deep imaging beyond the quasi-ballistic regime. Its high …
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Characterization of Photoacoustic Flow Cytometry Signals
<p>Photoacoustic flow cytometry has been utilized to clinically determine the presence of melanoma circulating tumor cells (CTCs). Further investigation was conducted into the morphology of detection signals and how they could be manipulated to allow for further classification. Novel features were …
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Advancing photoacoustic neuroimaging through deep learning
Submission published under a 24 month embargo labeled 'U of I Access', the embargo will last until 2024-12-01
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Clinical applications of quantitative photoacoustic imaging
Photoacoustic imaging is a medical imaging tool increasingly used in clinical research. It enables the imaging of molecules, including melanin, haemoglobin, lipids, collagen and water deep inside the body, with high resolution and high sensitivity. This molecular information has made it an …
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Miniaturization and integration of photoacoustic detection
Photoacoustic spectroscopy (PAS) is an absorption spectroscopy technique that is currently used for low-level gas detection, biological studies, and catalyst characterization. In PAS, the incident radiation is modulated at an acoustic frequency. In the presence of an absorbing species, the periodic …
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Photoacoustic photonic crystal fiber gas sensor
Photoacoustic spectroscopy (PAS) is a form of laser spectroscopy that has demonstrated very high sensitivity for gas detection. Typically, PAS involves the absorption of a modulated laser beam by the gas species of interest, and the subsequent generation of acoustic waves at the modulation …
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Extensions of quartz-enhanced photoacoustic spectroscopy
… of this thesis was to perform quartz-enhanced photoacoustic spectroscopy (QEPAS) on trace concentrations of NH3 in the 1.53 pm region with a DFB laser without the use of a resonating cavity. I analyzed the process of QEPAS both analytically and experimentally. First, absorption spectroscopy was …
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Photoacoustic Tomography of Diabetes and Reporter Genes
<p>Photoacoustic Tomography (PAT) is a hybrid technology which combines light absorption contrast with ultrasonic detection to achieve deep imaging of normally obscured absorbing molecules in tissue. PAT's inherent background free, super-depth imaging capability makes it particularly well suited …
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Multi-spectral Deep Tissue Quantitative Photoacoustic Imaging
<p>Photoacoustic tomography (PAT) detects the acoustic signals generated by optical absorption from chromophores. Using oxy- and deoxy-hemoglobin, multi-spectral PAT can image vasculature structure, and provide functional information. Most of the current PAT imaging studies face four challenges: …
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