Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 18 of 18 for “"Hybrid Imaging"”.
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Hybrid Inverse Problems Arising from Acousto-Electric Coupling
We study hybrid imaging techniques that aim to overcome the ill-posedness of the Electric Impedance Tomography using the acousto-electric coupling. For the isotropic case, we consider the problem of reconstructing the internal conductivity of an object by making electric measurements on the …
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Dynamic Measurements with Scanning Probe Microscopy: Surface Studies Using Nanostructured Test Platforms of Metalloporphyrins, Nanoparticles and Amyloid Fibrils
A hybrid imaging mode for characterization of magnetic nanomaterials has been developed, using atomic force microscopy (AFM) combined with electromagnetic sample actuation. Instead of using a coated AFM probe as a magnetic sensor; our strategy is to use a nonmagnetic probe with contact mode AFM to …
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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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Multi-parametric photoacoustic/ultrasound localization (PAUL) imaging and its applications
Noninvasive biomedical imaging technologies play a critical role in medical diagnostics, yet each modality has inherent limitations in spatial resolution, functional sensitivity, or molecular specificity. Hybrid imaging approaches have been developed to address these limitations, providing …
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Intranuclear strain measured by iterative warping in cells under mechanical and osmotic stress
… native extracellular environment. Therefore, a hybrid imaging and model based image registration technique has been developed to enabled us to explore links between biomechanical and biochemical signaling within individual cells. The hybrid technique uses an iterative warping deformable image …
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Breast cancer, medical imaging, and cancer genetics. A new genetic concept regarding the causes and prevention strategies of cancer is presented
… important. In this research focus is on medical imaging and its role in breast cancer screening, diagnosis, and treatment monitoring. Around 10% of all cancers are caused by inherited gene mutations which may cause cancer to run in families. Though, majority of cancer cases (up to 90%) are caused …
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Image Reconstruction in Photoacoustic Computed Tomography with Acoustically Heterogeneous Media
… thermoacoustic tomography, is a rapidly emerging hybrid imaging modality that combines optical image contrast with ultrasound detection. The majority of currently available PACT image reconstruction algorithms are based on idealized imaging models that assume a lossless and acoustically …
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MOBILE, HYBRID COMPTON/CODED APERTURE IMAGING FOR DETECTION, IDENTIFICATION AND LOCALIZATION OF GAMMA-RAY SOURCES AT STAND-OFF DISTANCES
… Imager (TMI) is a mobile truck-based, hybrid gamma-ray spectroscopic and imaging system able to quickly detect, identify and localize, radiation sources at standoff distances through improved sensitivity provided by multiple detection modes while minimizing the false alarm rate. …
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Image Reconstruction of the Speed of Sound and Initial Pressure Distributions in Ultrasound Computed Tomography and Photoacoustic Computed Tomography
… computed tomography (PACT) are two emerging imaging modalities that have a wide range of potential applications from pre-clinical small animal imaging to cancer screening in human subjects. USCT is typically employed to measure acoustic contrasts, including the speed of sound (SOS) …
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Multi-modality Imaging to Determine the Role of Calcification and Inflammation on Restenosis Rates Following Lower Limb Angioplasty
… PAD underwent 18F-NaF and 18F-FDG PET imaging of the superficial femoral artery (SFA), pre- and 6-weeks post-angioplasty. The primary outcome was restenosis at 12 months. DCB PTA was studied (compared to plain PTA) using near infrared fluorescence-optical coherence tomography hybrid …
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Deep Learning and Phase Retrieval for Chemical Holographic Imaging: System Inverse Modeling and Sample Property Prediction
… plane array (FPA) detectors, discrete infrared imaging (DFIR) enables high-resolution and high-speed infrared (IR) imaging for applications across multiple fields such as clinical diagnosis, forensics, and material science. The problems existing in currently available DFIR imaging systems are …
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Ultrasound-encoded optical tomography and time-reversed ultrasonically encoded optical focusing
… modulated optical tomography is a developing hybrid imaging modality that combines high optical contrast and good ultrasonic resolution to image soft biological tissue. We developed a photorefractive crystal-based, time-resolved detection scheme with the use of a millisecond long ultrasound …
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System Optimization and Iterative Image Reconstruction in Photoacoustic Computed Tomography for Breast Imaging
… as optoacoustic tomography (OAT), is an emerging imaging technique that has developed rapidly in recent years. The combination of the high optical contrast and the high acoustic resolution of this hybrid imaging technique makes it a promising candidate for human breast imaging, where conventional …
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Evaluation of a Dedicated SPECT-CT Mammotomography System for Quantitative Hybrid Breast Imaging
… three-dimensional (3D) dual-modality breast imaging system for enhanced semi-automated, quantitative clinical imaging. This novel hybrid imaging system combines functional or molecular information obtained with a SPECT subsystem with high-resolution anatomical imaging obtained with a low dose …
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Hybrid Spectral Micro-CT: System Implementation, Exposure Reduction, K-edge Imaging Optimization, and Content Management
… proven an important development in biomedical imaging, yet there are several limitations to this nascent technology. Near-term implementation of spectral CT imaging can be enhanced using a hybrid architecture that integrates a narrow-beam spectral 'interior' imaging chain integrated with a …
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Clinical Translation of Optoacoustic Imaging in Breast Cancer
Optoacoustic (OA) imaging is an emerging low-cost hybrid imaging investigation/technique currently in clinical feasibility studies for breast cancer diagnosis and staging. The technique applies pulsed light to the tissue of interest where molecules absorb the light photons and generate acoustic …
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Novel applications of fluorine-18 labelled radiotracers in cardiovascular disease
… In recent years the advent of non-invasive hybrid imaging through the amalgamation of positron emission tomography (PET) with computed tomography (CT) and magnetic resonance (MR) imaging has allowed for the identification of physiological abnormalities which, in addition to established …