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 19 of 19 for “"Medical instrumentation"”.
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Geometric Probing
… device. A variety of problems from robotics, medical instrumentation, mathematical optimization, integral and computational geometry, graph theory, and other areas fit into this paradigm.
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HIGH POWER ALGAN BASED DEEP UV LED LAMPS: DESIGN, FABRICATION AND CHARACTERIZATION
… water/air purification, analytical scientific instrumentation, bio-agent detection systems, and emerging medical instrumentation. Current UV-LEDs are limited in the market penetration due to the relatively low output power and quantum efficiency despite their inherent benefits of low cost, …
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Code-error calibration techniques for two-step flash analog-to-digital converters
… TVs, image recognition, radar, and medical instrumentation. However, the linearity of these state-of-the-art flash-type ADCs has been limited to 10 bits by ratio mismatch of passive components. Although techniques such as laser-trimming, self-calibration and error-averaging have been …
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Accuracy of the OMRON M4 automatic sphygmomanometer
… and the Association for the Advancement of Medical Instrumentation (AAMI) protocols for evaluation of automatic sphygmomanometers. We concluded that the Omron M4 is questionable rating according to previously stated guidelines. This minor thesis was written by a post-graduate student as part …
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Linear regression model for continuous non-invasive blood pressure estimation for an ICU setting
… with the Association for Advancement for Medical Instrumentation standards, thus providing a potential solution for the underlying risk-factors associated with the conventional method.
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Some experimental investigation on effect of light and vibration on nano coated piezo for energy harvesting
… sensors and transducers, electrical switches, medical instrumentation, artificial sensitive skin in robotics, automotive detection on roads, nondestructive testing , structural health monitoring and as a biocompatible material. In this research a cantilever based multi energy harvester was …
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Measurement of Thermal Impedance of Deep Ultraviolet Light Emitting Diodes
… curing, chemical and biological sensors, and medical instrumentation. However, DUV LEDs, with peak emission wavelength between 250 and 320 nm, are prone to self-heating. This rise in temperature during normal operation leads to early saturation of the light output power of these devices at …
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An AFE based embedded system for physiological computing
… comply with the Association for Advancement for Medical Instrumentation standard and can replace its industry-standard counterparts.
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Application of supervised and unsupervised learning to analysis of the arterial pressure pulse
… to the Association for the Advancement of Medical Instrumentation. This could facilitate a new role for non-invasive sphygmographic devices, to be used not only for feature estimation but as alternatives to invasive arterial pressure sensors in the measurement of continuous blood pressure.
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Application of Signal Advance Technology to Electrophysiology
Medical instrumentation used in diagnosis and treatment relies on the accurate detection and processing of various physiological events and signals. While signal detection technology has improved greatly in recent years, there remain inherent delays in signal detection/ processing. These delays may …
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Design, Modeling, and Analysis of Microscale Pneumatic Valve Architectures to Simplify Integration of Small Displacement Actuators
… Impacted industries include: mobile robotics, medical instrumentation, natural gas handling, industrial control systems, and process control instrumentation. This research establishes a fundamental understanding of flow rate behavior in valves operating at microscale displacements. The valve …
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Development of a practical electrical tomography system for flexible contact sensing applications
… and industrial robots; health care systems and medical instrumentation; prosthetic devices; and in the context of human-machine interaction. However, these applications require the integration of tactile sensors over various objects with different surface shapes. This emphasises the need of …
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Enhanced Vasculature Imaging of the Retina Using Optical Coherence Tomography
<p>Optical coherence tomography (OCT) is a non-invasive imaging modality that uses low coherence interferometry to generate three-dimensional datasets of a sample's structure. OCT has found tremendous clinical applications in imaging the retina and has demonstrated great utility in the diagnosis of …
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Effects of high intensity focused ultrasound on the intervertebral disc
The purpose of this study was to study and try to optimise high intensity focused ultrasound treatment of the intervertebral disc. We demonstrated that it was possible to heat intervertebral discs with HIFU delivered by 50 or 5 mm diameter ultrasound transducers. Finite element studies indicated …
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Dysfunctional but viable myocardium - ischemic heart disease assessed by magnetic resonance imaging and single photon emission computed tomography
The assessment of ischemic heart disease (IHD) often focuses on the detection of dysfunctional but viable myocardium which may improve in function following revascularization. Dysfunctional but viable myocardium is identified by distinct characteristics with regards to function, perfusion and …
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MRI at 3 T of brain functions and fibre tracts adjacent to intracranial tumors
The aims of the studies were: to evaluate the spatial resolution of fMRI at 3 T by studying fingersomatotopy in area 3 b of the primary sensory area (Paper 1); to investigate the potential of fMRI at 3T as a clinical tool for preoperative evaluation of patients with intracranial tumors (Paper 2); …
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Microvascular inflammatory response in the skin
This thesis examines the microvascular inflammatory response in the skin. The microvascular response includes vasodilatation and plasma exudation. In the first three studies, the combined response was measured in guinea pig skin with a technique based on detection of radiolabelled protein. …
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Quantitative assessment of myocardial infarction: On the relationship between anatomy and electrophysiology using MRI and ECG
Both presence and extent of myocardial infarction are important prognostic factors for mortality and quality of life in patients with ischemic heart disease. Thus, it is of great clinical importance to be able to diagnose and characterize myocardial infarction. One way to diagnose myocardial …
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Are gadolinium contrast media really less nephrotoxic than iodine agents in radiographic examinations? A comparison in relation to their ability to attenuate x-rays in a pig model
Purpose: To confront the statement that gadolinium contrast media (Gd-CM) are less nephrotoxic than iodine contrast media (I-CM) when used in x-ray angiographic and computed tomographic (CT) examinations. Methods: I) For CT measurements (mean density in Hounsfield numbers) 20-mL syringes filled …