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.
Results
Showing 1 to 20 of 30 for “"imaging devices"”.
-
A machine’s idea of sight: the technico-sensory divide in the human use of imaging devices
… specific cases and predicts the state of image devices in the future.
-
Effects of target size, luminance contrast, and illumination on visual target detection and recognition with AN/AVS-6 goggles
… in the development of low light level and night imaging technologies to gain tactical advantages on the battlefield. Moreover, certain military activities such as night aviation maneuvers demand the most sophisticated night imaging devices. Unfortunately, as the frequency of use of night imaging …
-
Investigation of plenoptic imaging systems: a wave optics approach
Conventional imaging devices only capture a part of the total information carried by the light. A new generation of imaging devices, plenoptic systems, use an array of micro lenses to codify the light coming from an object into a four dimensional function called the light field. The final image is …
-
Sub-Diffraction Imaging using Superoscillatory Electromagnetic Waves
This thesis presents an investigation on imaging beyond the diffraction limit with superoscillatory electromagnetic waves. It begins with a survey on sub-diffraction imaging, which motivates the need for a new sub-diffraction imaging device which is free from drawbacks in devices which have …
-
Advances in the endoscopic management of esophageal neoplasia using ultrahigh speed endoscopic optical coherence tomography
… optical coherence tomography (OCT) is a unique imaging technique that can provide micrometer scale, two- and three-dimensional imaging of esophageal tissue without requiring exogenous contrast agents. Although various studies have investigated the feasibility of endoscopic OCT in the human GI …
-
Development of a Non-Contact Fluorescence Tomography System with Appropriate Reconstruction Techniques
Molecular Imaging is a highly topical research field based on the combination of highly selective markers and appropriate imaging devices. It is mainly concerned with studying the effects of prototype drugs in small animals, following day by day the evolution of the disease in vivo. Amongst the …
-
Machining induced defects in Relaxor ferroelectric PMN-PT crystals
… as well as broad band medical ultrasonic imaging devices. Production of phased array probes utilizing these types of high performance ceramics requires dicing these crystals to arrays with pitches of less than the desired wavelength, ranging from tens to hundreds of micrometers. However, …
-
Advances in Optical Coherence Tomography and Microscopy for endoscopic applications and functional neuroimaging
… Tomography (OCT) is a developing medical imaging technology that generates micron resolution cross-sectional images of subsurface internal tissue structure in situ and in real time, without the need to remove and process specimens. Previous studies have suggested that OCT holds great …
-
Minimally invasive diagnostic imaging using high resolution Optical Coherence Tomography
Advances in medical imaging have given researchers unprecedented capabilities to visualize, characterize and understand biological systems. Optical Coherence Tomography (OCT) is a high speed, high resolution imaging technique that utilizes low coherence interferometry to perform cross-sectional …
-
The Brain Scan as Ideograph
<p>Medical imaging devices have enabled doctors to render images of the brain without cutting into the body. These images are colloquially called “brain scans.” Through journalism and mass dissemination online, brain scans have become an example of Michael Calvin McGee’s “ideograph,” a language …
-
An investigation of stereopsis with AN/AVS-6 night vision goggles at varying levels of illuminance and contrast
… has led to the development of various night imaging devices. Night vision goggles (NVGs) are one device which have gained widespread use in nighttime helicopter operations. However, rotorcraft accident data have indicated an increased occurrence of "pilot error" type accidents when NVGs are …
-
Experiments and simulations on a metamaterial based ultrasonic scanner
… a superior technology to optical fingerprint imaging technologies [1]. In this thesis, we propose a new design of an ultrasonic fingerprint scanner, which has reduced complexity and lower cost of operation. The device uses a ID array of transducers to generate focal spots under the finger …
-
Structure–Property Relationships in Hybrid Crystalline Materials for Multifunctional Light–Matter Interactions
… step toward next-generation optical sensors and imaging devices. Overall, this dissertation establishes new molecular design principles for stable, tunable, and multifunctional hybrid materials, bridging the fields of nonlinear optics, photonics, and quantum technologies. These advances open up …
-
High resolution imaging of neoplasma using optical coherence tomography
Diagnostic imaging technologies for the detection of cancer include CT, MRI, ultrasonography, and endoscopy. However, many early neoplastic changes remain beyond their detection limits. A modality capable of imaging at or near the cellular level could detect disease at earlier stages than currently …
-
Applying Artificial Intelligence and Mobile Technologies to Enable Practical Screening for Diabetic Retinopathy
… and a large variability in fundus imaging devices. To address these concerns, I present the development of an image processing pipeline and a neural net algorithm that automatically tests image quality (based on brightness, color, and amount of blur), rejects poor quality images, …
-
Design and Operational Assessment of a Mobile Robot for Undercarriage Inspection of Railcars
… improvements to the structure, drive system, imaging devices, and operator remote control to improve the speed, track maneuverability, and duty cycle of the robot. The TCR includes a drive system consisting of two AC motors that operate a track (like tank tracks). It further includes two …
-
Automated analysis of digital medical images in cervical cancer screening: A systematic review
… have been developing low-cost portable devices, some of which are incorporated with automated image analysis to enhance diagnostic decision-making. The methods for incorporating automation within each domain of the cervical cancer screening protocol are becoming numerous as researchers …
-
Shortwave infrared imaging and its translation to clinically-relevant designs
… tissue is a central challenge in biomedical imaging, with both preclinical implications and clinical relevance. Using shortwave infrared (SWIR) light enables imaging with high resolution, high sensitivity, and sufficient penetration depth to noninvasively interrogate sub-surface tissue …
-
Integración de imágenes biomédicas : técnicas basadas en teoría de la información
… software developed, the users of small animal imaging devices can integrate information from different modalities easily.
-
A photon counting pixel detector for x-ray imaging
… in this thesis as an alternative to current imaging systems in medical imaging and synchrotron radiation applications. The technology has been developed from research performed in High Energy Physics, in particular, for the ATLAS experiment at the LHC, planned for 2005. This thesis describes …
Page 1 of 2