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 11 of 11 for “"RADIOGRAPHIC IMAGE"”.
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Effect of Image Sharpening on Radiographic Image Quality
… that capture and processing of the digital radiographic images may contain artifacts that could reduce the diagnostic value of dental radiographs. This phenomenon has been reported through various case reports. However, its effect on radiographic image quality has not been studied. The …
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Beam characterization at the neutron radiography reactor
… imaging beam directly impacts the quality of radiographic images produced using that beam. Fully characterizing a neutron beam, including determination of the beam's effective length-to-diameter ratio, neutron flux profile, energy spectrum, image quality, and beam divergence, is vital for …
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Fast neutron resonance radiography for element imaging : theory and applications
… of other elements are obtained from fast neutron radiographic images taken at different neutron energies chosen to cover the resonance cross section features of one or more elements. A radiographic image provides the 2-D mapping of the sum of elemental contents (weighted by the attenuation …
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Retrospective study of the success of dental implants placed in HIV positive patients at the Henry M. Goldman School of Dental Medicine
… After a medical interview an intraoral radiographic image of the dental implant was used for comparison with the one taken at the date of implant placement to measure the amount of bone loss around the implant. This study aimed to determine if an unmodifiable factor such as HIV and the …
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Development of a method for automating effective patient diameter estimation for digital radiography
National patient dose audit of paediatric radiographic examinations is complicated by a lack of data containing a direct measurement of the patient diameter in the examination orientation or height and weight. This has meant that National Diagnostic Reference Levels (NDRLs) for paediatric …
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Optimisation of radiation dose and image quality for AP pelvis radiographic examination
… and rationale:Optimising radiation dose and image quality in medical imaging is essential in minimising radiation risk and ensuring images are fit for purpose. This thesis uses novel methods for image quality assessment and radiation dose/image quality optimisation. The antero-posterior (AP) …
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Digital Radiographic Analysis of Mineral Density of Adjacent Alveolar Bone in Relation to the Molar Translation Rate After Use of Retromolar Implant Anchorage
Molar translation using retromolar implants provides an unique opportunity to measure the rate of orthodontic tooth movement, because implants do not permit any reactive movement from the force. Contrast-corrected digital radiography was utilized to investigate the rate of molar translation related …
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Gallium-68 DOTATATE PET/CT in Neuroendocrine Tumors
The general metadata -- e.g., title, author, abstract, subject headings, etc. -- is publicly available, but access to the submitted files is restricted to UT Southwestern campus access and/or authorized UT Southwestern users.
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Factors Influencing Contrast Resolution of Cone Beam CT Using the CB MercuRay
… mA) that influence the contrast resolution of images as measured by HU that are acquired from a phantom scanned with the CB MercuRay device.</p> <p><strong>Materials and Methods:</strong> A phantom was fabricated with 11 hydroxyapatite cylindrical disks with increasing mineral densities. Values …
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Ricketts Analysis Using Conventional and DolphinTM Generated CBCT Lateral Cephs
… synthesized CBCT lateral cephalograms of a radiographic phantom in orthogonal and perspective projections were created. Horizontal and vertical measurements were made in multiple planes on the radiographic phantom to compare each imaging modality. Twenty-five lateral cephalometric …
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ΔΙΕΡΕΥΝΗΣΗ ΦΥΣΙΚΟΓΕΩΜΕΤΡΙΚΩΝ ΠΑΡΑΜΕΤΡΩΝ ΓΙΑ ΒΕΛΤΙΣΤΟΠΟΙΗΣΗ ΤΗΣ ΑΚΤΙΝΟΓΡΑΦΙΑΣ
PHOTOGRAPHIC CHARACTERISTICS, CHARACTERISTICS OF IMAGE TRANSFER AND MOTTLE HAVE BEEN INVESTIGATED FOR SEVERAL SCREEN-FILM SYSTEMS. CALCULATIONS ON INFORMATION CAPACITY FOR SCREEN-FILM SYSTEMS HAVE BEEN CONDUCTED AND THE INTRODUCTION OF THE PARAMETER "INFORMATION CAPACITY PER UNIT AREA AND PER UNIT …