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 20 of 271 for “"phantoms"”.
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Phantoms and Exceptional Collections on Rational Surfaces
This thesis is concerned with exceptional collections on smooth projective surfaces. Any rational surface over an algebraically closed field admits a full exceptional collection. We extend certain classification results regarding exceptional collections, previously known for del Pezzo surfaces, to …
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Ideals in triangulated categories : phantoms, ghosts and skeleta
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Mathematics, 1997.
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Novel Phantoms and Post-Processing For Diffusion Spectrum Imaging
… which validated the DSI results using physical phantoms and both these studies were not performed on a clinical MRI scanner. Also, the limited studies which optimized DSI in a clinical setting, did not involve a comparison against physical phantoms. Finally, there is lack of consensus on the …
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Light Scattering Spectroscopy of Tissue Phantoms for Applications in Biomedical Sciences
… technique to predict the refractive index of the phantoms based on a predetermined calibration curve. The results showed that when increasing the lipid content of phantoms, the change in Brillouin frequency shift is not proportional to the change in longitudinal mod- ulus, showing that knowledge …
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Cryptic Secrets: Phantoms of the Haitian Revolution in the American Imaginary
… the roots of these revolutionary traumas (or ‘phantoms’) and uncovers the ‘encrypted’ secrets that underlie the multiple layers of myth, obfuscation, and silence that characterize American representations of Haiti—secrets which reflect both the limits of Haiti’s continual revolutionary power, …
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Low-Energy Photon Dose Deposition in Tissue Slab and Spherical Phantoms
… photons incident on slab and spherical phantoms. Photon energies ranged from 10 to 150 keV. Phantom compositions include: ICRU 4-element tissue, ICRU 10-element tissue, a tissue-substitute plastic, lucite, water, and polystyrene. Tabular data are presented for 0.007, 0.3 and 1.0 g/cm('2) …
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Characterizing Muscle and Subcutaneous Adipose Tissue Imaging Phantoms for NMR Application
… sensor for measuring fluid volume in vivo. The phantoms simulate muscle and subcutaneous adipose tissues (SCAT) and assure the repeatability and accuracy of the technique. We determined that the 40% phantoms model muscle tissue and 70% model SCAT. The microstructure of the 40% phantoms was …
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Diffusion Tensor Imaging: Evaluation of Tractography Algorithm Performance Using Ground Truth Phantoms
Diffusion Tensor Magnetic Resonance Imaging (DT-MRI), also known as Diffusion Tensor Imaging (DTI), is a unique medical imaging modality that provides non-invasive estimates of White Matter (WM) connectivity based on local principal directions of anisotropic water diffusion. DTI tractography …
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Real-time membrane puncture detection using force sensors for micro-injections in phantoms
… forces during injections into tissue-mimicking phantoms suggests that sensors accurately measure projection of the needle force onto the vertical direction and are sensitive to puncture events through relatively thick (0.15 mm) membranes. Injections into mouse tissue yielded low success rates, …
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Phantoms à base de PVCP para simular imagens ultrassonográficas de lesões de mama
… lesions could be reproduced and therefore these phantoms can be used in training medical staff and develop lesion classification software.
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Improving Healthcare Professionals’ Ultrasound-Guided Peripheral Vascular Access Ability Utilizing Homemade Ultrasound Phantoms
Purpose: The primary objective of this quality improvement project was to improve healthcare workers' confidence, competence, knowledge, and skills in placing ultrasound-guided peripheral intravenous catheters using homemade ultrasound phantom models.Background: Ultrasound guidance can reduce the …
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Phantoms of the Barrio: Chicana/o urban spatial politics and muralism, 1965-1985
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-09-01 without embargo terms
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An Automated Syringe Pump System For Improving The Reproducibility of Dynamic Hyperpolarized Mri Phantoms
… REPRODUCIBILITY OF DYNAMIC HYPERPOLARIZED MRI PHANTOMS</p> <p>Harlee Grace Harrison, B.S.</p> <p>Advisory Professor: James Bankson, Ph.D.</p> <p>Magnetic Resonance Imaging (MRI) is a powerful tool in the diagnosis of cancer due to its ability to provide good soft tissue contrast and image …
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Imaging and spectroscopy of tissue-like phantoms using photon density waves: Theory and experiments
The determination of the optical properties of turbid biological media is of primary importance in several areas of medicine and biotechnology. In particular, the quantitative determination and spatial localization of the optical scattering and absorbing properties of biological tissue would allow …
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Characterization of Optically Stimulated Luminescent Detectors In Photon & Proton Beams For Use In Anthropomorphic Phantoms
This study investigated characteristics of optically stimulated luminescent detectors (OSLDs) in protons, allowing comparison to thermoluminescent detectors, and to be implemented into the Radiological Physics Center’s (RPC) remote audit quality assurance program for protons, and for remote …
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