Biomaterial Database

The spatial resolution of a rotating gamma camera tomographic facility. 1983

S Webb, and M A Flower, and R J Ott, and M O Leach, and R Inamdar

An important feature determining the spatial resolution in transverse sections reconstructed by convolution and back-projection is the frequency filter corresponding to the convolution kernel. Equations have been derived giving the theoretical spatial resolution, for a perfect detector and noise-free data, using four filter functions. Experiments have shown that physical constraints will always limit the resolution that can be achieved with a given system. The experiments indicate that the region of the frequency spectrum between KN/2 and KN where KN is the Nyquist frequency does not contribute significantly to resolution. In order to investigate the physical effect of these filter functions, the spatial resolution of reconstructed images obtained with a GE 400T rotating gamma camera has been measured. The results obtained serve as an aid to choosing appropriate reconstruction filters for use with a rotating gamma camera system.

UI	MeSH Term	Description	Entries
D007089	Image Enhancement	Improvement of the quality of a picture by various techniques, including computer processing, digital filtering, echocardiographic techniques, light and ultrastructural MICROSCOPY, fluorescence spectrometry and microscopy, scintigraphy, and in vitro image processing at the molecular level.	Image Quality Enhancement,Enhancement, Image,Enhancement, Image Quality,Enhancements, Image,Enhancements, Image Quality,Image Enhancements,Image Quality Enhancements,Quality Enhancement, Image,Quality Enhancements, Image
D008962	Models, Theoretical	Theoretical representations that simulate the behavior or activity of systems, processes, or phenomena. They include the use of mathematical equations, computers, and other electronic equipment.	Experimental Model,Experimental Models,Mathematical Model,Model, Experimental,Models (Theoretical),Models, Experimental,Models, Theoretic,Theoretical Study,Mathematical Models,Model (Theoretical),Model, Mathematical,Model, Theoretical,Models, Mathematical,Studies, Theoretical,Study, Theoretical,Theoretical Model,Theoretical Models,Theoretical Studies
D005374	Filtration	A process of separating particulate matter from a fluid, such as air or a liquid, by passing the fluid carrier through a medium that will not pass the particulates. (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)	Filtrations
D000388	Air	The mixture of gases present in the earth's atmosphere consisting of oxygen, nitrogen, carbon dioxide, and small amounts of other gases.
D012399	Rotation	Motion of an object in which either one or more points on a line are fixed. It is also the motion of a particle about a fixed point. (From McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)	Clinorotation,Clinorotations,Rotations
D013667	Technetium	The first artificially produced element and a radioactive fission product of URANIUM. Technetium has the atomic symbol Tc, and atomic number 43. All technetium isotopes are radioactive. Technetium 99m (m	Technetium 99m,99m, Technetium
D014055	Tomography, Emission-Computed	Tomography using radioactive emissions from injected RADIONUCLIDES and computer ALGORITHMS to reconstruct an image.	CAT Scan, Radionuclide,CT Scan, Radionuclide,Computerized Emission Tomography,Radionuclide Tomography, Computed,Scintigraphy, Computed Tomographic,Tomography, Radionuclide-Computed,Computed Tomographic Scintigraphy,Emission-Computed Tomography,Radionuclide Computer-Assisted Tomography,Radionuclide Computerized Tomography,Radionuclide-Computed Tomography,Radionuclide-Emission Computed Tomography,Tomography, Computerized Emission,CAT Scans, Radionuclide,CT Scans, Radionuclide,Computed Radionuclide Tomography,Computed Tomography, Radionuclide-Emission,Computer-Assisted Tomographies, Radionuclide,Computer-Assisted Tomography, Radionuclide,Computerized Tomography, Radionuclide,Emission Computed Tomography,Emission Tomography, Computerized,Radionuclide CAT Scan,Radionuclide CAT Scans,Radionuclide CT Scan,Radionuclide CT Scans,Radionuclide Computed Tomography,Radionuclide Computer Assisted Tomography,Radionuclide Computer-Assisted Tomographies,Radionuclide Emission Computed Tomography,Scan, Radionuclide CAT,Scan, Radionuclide CT,Scans, Radionuclide CAT,Scans, Radionuclide CT,Tomographic Scintigraphy, Computed,Tomographies, Radionuclide Computer-Assisted,Tomography, Computed Radionuclide,Tomography, Emission Computed,Tomography, Radionuclide Computed,Tomography, Radionuclide Computer-Assisted,Tomography, Radionuclide Computerized,Tomography, Radionuclide-Emission Computed
D014867	Water	A clear, odorless, tasteless liquid that is essential for most animal and plant life and is an excellent solvent for many substances. The chemical formula is hydrogen oxide (H2O). (McGraw-Hill Dictionary of Scientific and Technical Terms, 4th ed)	Hydrogen Oxide