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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 647 for “"Perfusion"”.
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Development of the Passive Perfusion Probe for Non-Invasive Blood Perfusion Measurement
A non-invasive blood perfusion system has been developed and tested in a phantom tissue and an animal model. The system uses a small sensor with a laminated flat thermocouple to measure the heat transfer response to an arbitrary thermal event (convective or conductive) imposed on the tissue …
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Peripheral perfusion imaging modeling
… fusion imaging. Novel pulsed-Doppler methods for perfusion imaging are val- idated using dialysis cartridges as perfusion phantoms. Techniques are exam- ined quantitatively at 5 and 12.5 MHz using phantoms with blood-mimicking fluid flow within cellulose microfibers. A variety of flow states are …
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Ultrasound tissue perfusion imaging
Enhanced blood perfusion in a tissue mass is an indication of neo-vascularity and potential malignancy. Ultrasonic pulsed Doppler imaging is a safe and economical modality for noninvasive monitoring of blood flow. However, weak blood echoes make it difficult to detect perfusion using standard …
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A blood-perfusion flowmeter
… of these methods are unsuitable for measuring perfusion flow in tissue. Basically all attempts at perfusion flow measurement have used either a tracer method (radio-active dyes, microspheres) or a thermal method where the rate of heat clearance from a heated probe is used as a measure of local …
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Perfusion Solution Optimization by Substrate Alteration and Nanoparticle Delivery for Cardiac Hypothermic Machine Perfusion
Pages vi-xviii are misnumbered as vii-xix.
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A network model for perfusion chromatography
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 1995.
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Method for Evaluating Changing Blood Perfusion
… insight into methods for estimating blood perfusion, emphasizing the need for accurate modeling in dynamic physiological environments. The thesis critically examines conventional error function solutions used in steady state or gradually changing blood flow scenarios, revealing their …
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Hypothermic Machine Perfusion of Composite Tissues
Organ perfusion systems have successfully been applied to solid organ preservation and subsequent transplantation. However, their use in limb preservation for Vascularized Composite Tissue Allotransplantation (VCA) has yet to be thoroughly investigated. This thesis explores the potential for …
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Analyzing the Effect of Neoadjuvant Stereotactic Ablative Body Radiotherapy on Pancreatic Tumour Perfusion Using Computed Tomography Perfusion
… density, which can significantly limit tumour perfusion and restrict the systemic delivery of chemotherapy drugs to the tumour site. To overcome this barrier, several studies have demonstrated that irradiating the tumour volume with a high dose of radiation in hypofractionated radiotherapy can …
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Development of a Phantom Tissue for Blood Perfusion Measurements and Noninvasive Blood Perfusion Estimation in Living Tissue
… method for testing and calibrating surface perfusion sensors has been developed. A phantom tissue model is used to mimic the non-directional blood flow of tissue perfusion. A computational fluid dynamics (CFD) model was constructed in Fluent to design the phantom tissue and validate the …
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An In Vivo Perfusion Apparatus for Studies on Gingival Disease : Assessment by a Perfusion of Nonspecific Proteolytic Enzymes
<p>This thesis describes an in vivo perfusion apparatus which can continuously deliver controlled quantities of solutions to localized, contralateral intra oral areas in albino rats. Three animals were per fused on the experimental area (the mesial sulcular area of the maxillary first molar) on one …
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An Analysis of Perfusion Technology Preadmission Factors on Academic Success and American Board of Cardiovascular Perfusion Certification Achievement
… (WAIS-R) practical scores toward predicting perfusion academic success, career placement as a clinical perfusionist, and certification success or failure. The files of 95 students enrolled in the perfusion technology program at Carlow University-University of Pittsburgh Medical Center School …
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Myocardial Perfusion Imaging With Rb-82 PET
Myocardial perfusion imaging (MPI) is an effective technique used to study the left ventricular ejection function (LVEF), myocardial perfusion, wall motion, and wall thickening. Positron emission tomography (PET) and single photon emission computed tomography (SPECT) are two modalities that can be …
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Power doppler ultrasound for peripheral perfusion imaging
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2023-12-04 without embargo terms
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Catheter based magnetic resonance compatible perfusion probe
… a thermal based technique to quantify brain perfusion. The thermal diffusion probe (TDP) technology measures perfusion in a relatively small volume of brain tissue. The neurosurgeon chooses the specific brain location and probe placement based on their clinical concern. When an early …
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A multi-site perfusion monitoring sub-system
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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Tomographic ventilation-perfusion lung scintigraphy in cardiopulmonary disease
… on the balance between regional ventilation and perfusion in the lungs. There are many cardiopulmonary diseases, such as pulmonary embolism (PE), chronic obstructive pulmonary disease (COPD) and left heart failure (LHF), which can affect respiration negatively. The diagnosis of PE, COPD and LHF …
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Dynamic Cone-beam Reconstruction for Perfusion Computed Tomography
Perfusion CT (Computed Tomography) is a dynamic imaging technique whose aim is to assess the blood supply to tissue. The limited field of view of current CT detectors restricts its use to perfusion studies of a small volume. The introduction of large area detectors in CT, however, will allow …
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