Open Access. Powered by Scholars. Published by Universities.®
Analytical, Diagnostic and Therapeutic Techniques and Equipment Commons™
Open Access. Powered by Scholars. Published by Universities.®
- Discipline
Articles 1 - 2 of 2
Full-Text Articles in Analytical, Diagnostic and Therapeutic Techniques and Equipment
Theoretical And Experimental Evaluation Of Spatial Resolution In A Variable Resolution X-Ray Computed Tomography Scanner, Roman Melnyk
Theoretical And Experimental Evaluation Of Spatial Resolution In A Variable Resolution X-Ray Computed Tomography Scanner, Roman Melnyk
Theses and Dissertations (ETD)
A variable resolution x-ray (VRX) computed tomography (CT) scanner can image objects of various sizes with greatly improved spatial resolution. The scanner employs an angulated discrete detector and achieves the resolution boost by matching the detector angulation to the scanner field of view (FOV) determined by the size of an object being imaged. A comprehensive evaluation of spatial resolution in an experimental version of the VRX CT scanner is presented in this dissertation. Two components of this resolution were evaluated – the pre-reconstruction spatial resolution, described by the detector presampling modulation transfer function (MTF), and the post-reconstruction spatial resolution, given …
Depth And Size Limits For The Visibility Of Veins Using The Veinviewer Imaging System, Soujanya Ganesh
Depth And Size Limits For The Visibility Of Veins Using The Veinviewer Imaging System, Soujanya Ganesh
Theses and Dissertations (ETD)
Administration of fluids or medication and blood draw procedures require the nurse or the phlebotomist to access the veins in patients at hospitals or phlebotomy centers. It is important to minimize the discomfort associated with sticking needles in the patient more than once and most often, necessary to find an appropriate vein within few minutes. However, problems involved in accessing veins in pediatric and obese patients make it very difficult to perform a successful stick in a short time. The VeinViewer Imaging System is an infrared imaging device that provides the nurses and phlebotomists a means for locating veins in …