Title :
Design of a Wire-Mesh Collimator for Gamma Cameras
Author :
Saripan, M. Iqbal ; Petrou, Maria ; Wells, Kevin
Author_Institution :
Surrey Univ., Guildford
Abstract :
This paper presents a model of a wire-mesh collimator for a gamma camera that produces images of comparable quality as those produced with the conventional multihole collimator, but has about half the weight of the multihole collimator. The gamma camera and the collimator are simulated using the MCNPX code. Two final configurations of the wire-mesh collimator are proposed, and their performance is compared with other wire-mesh collimators and with the multihole collimator, using a point source, a planar square source, and two point sources, all in water. In all cases, photons with energy 140 keV are simulated. In addition, we use the simulation of a realistic phantom of a hot tumor in a warm background to assess the performance of our collimator in conjunction with an extended source.
Keywords :
Monte Carlo methods; biomedical equipment; collimators; phantoms; radioisotope imaging; tumours; MCNPX code; electron volt energy 140 keV; gamma cameras; hot tumor phantom; photon energy; planar square source; two point sources; wire mesh collimator design; Cameras; Image restoration; Imaging phantoms; Medical simulation; Monte Carlo methods; Optical collimators; Optical imaging; Water resources; Wiener filter; Wire; Gamma camera; Wiener filtering; multihole collimator; nuclear medicine; wire-mesh collimator; Computer-Aided Design; Equipment Design; Equipment Failure Analysis; Gamma Cameras; Humans; Image Enhancement; Neoplasms; Phantoms, Imaging; Radionuclide Imaging; Reproducibility of Results; Sensitivity and Specificity;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.2007.902584
