Journal ArticleDOI
A Computer Assisted Ringdector Positron Camera System for Reconstruction Tomography of the Brain
TLDR
A ring detector positron camera system for brain metabolism studies is being constructed at the Institute of Physics, University of Stockholm, in collaboration with the Departments of Neuroradiology and clinical Neurophysiology.Abstract:
A ring detector positron camera system for brain metabolism studies is being constructed at the Institute of Physics, University of Stockholm, in collaboration with the Departments of Neuroradiology and clinical Neurophysiology, Karolinska Sjukhuset, Stockholm, Sweden. The instrument utilizes 95 NaI(Tl) detectors and will simultaneously record coincidences from 1900 detector combinations. Each detector is coupled in coincidence with forty detectors on the opposite side of the ring. In the conventional stationary mode of operation the experimental system resolution is 10.5 mm. A new sampling technique has been developed to reduce the system resolution. Based on this technique, an experimental system resolution of 7 mm has been obtained.read more
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Study of Cerebral Function with Positron Computed Tomography
TL;DR: Abbreviations: ACD, Annihilation coincidence detection; BGO, bismuth germanate; CBF, cerebral blood flow; CBV, cerebralBlood volume; CMG, 3-(11C)-methyl-D-glucose; CMRGlc, cerebral metabolic rate for glucose'; CMR02, cerebral metabolism rate for oxygen; CsF, cesium fluoride; CT, computed tomography
Journal ArticleDOI
Computerized tomography with X-ray, emission, and ultrasound sources
TL;DR: This paper reviews the major developments that have taken place during the last three years in imaging with computed tomography (CT) using X-ray, emission, and ultrasound sources and highlights the great interest in positron tomography.
Journal ArticleDOI
Fully-three-dimensional positron emission tomography
TL;DR: Fully three-dimensional positron emission tomography is considered and a reconstruction algorithm derived that is computationally feasible and results in accurate reconstructions.
Journal ArticleDOI
Positron emission tomography.
Gerd Muehllehner,Joel S. Karp +1 more
TL;DR: Improvements are highlighted including the move from PET scanners with septa to fully 3D scanners, changes in the preferred scintillators, efforts to improve the energy discrimination, and improvements in attenuation correction.
Book
PET: Physics, Instrumentation, and Scanners
Simon R. Cherry,Magnus Dahlbom +1 more
TL;DR: Positron emission tomography (PET) is a nuclear imaging technique that uses the unique decay characteristics of radionuclides that decay by positron emission as mentioned in this paper, which is used to label compounds of biological interest.
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Journal Article
Application of Annihilation Coincidence Detection to Transaxial Reconstruction Tomography
TL;DR: A study was carried out to investigate the use of annihilation coincidence detection (ACD) in emmision transaxial reconstruction tomography and found that this approach yields a quantitative nuclear medicine imaging device with high detection efficiency.
Journal ArticleDOI
A positron-emission transaxial tomograph for nuclear imaging (PETT).
TL;DR: An apparatus was developed for obtaining emission transaxial images of sections of organs containing positron-emitting radiopharmaceuticals and this approach is capable of providing images of better contrast and resolution than are obtained with scintillation cameras.
Journal ArticleDOI
Performance Parameters of a Positron Imaging Camera
TL;DR: In this article, two Anger scintillation cameras have been combined into a positron imaging system with high sensitivity (200 cts/sec/?Ci), high resolution (system resolution less than 10 mm FWHM) and useful clinical count rates up to 8000 cts /sec.
Journal ArticleDOI
Circular Ring Transverse Axial Positron Camera for 3-Dimensional Reconstruction of Radionuclides Distribution
Zang-Hee Cho,J. Chan,L. Eriksson +2 more
TL;DR: In this article, a positron camera system was designed to record the coincidences from 2 × 736 (or 2 × 1116) detector combinations in a circular array with a single layer of 64 (or 72) NaI(T1) crystals and PM tubes.
Journal ArticleDOI
High Resolution Computed Tomography of Positron Emitters
TL;DR: Measurements of imaging and background rates under various operating conditions are presented and it is shown that 1.5 million events are sufficient to reliably image 3.5 mm hot spots with 14 mm center-to-center spacing and isolated 9 mm diameter cold spots in phantoms 15-20 cm in diameter.