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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Pretorius, P.H. Glick, S.J. De Vries, D.J. Licho, R. King, M.A. |
| Copyright Year | 2000 |
| Description | Author affiliation: Massachusetts Univ. Med. Center, Worcester, MA, USA (Pretorius, P.H.) |
| Abstract | The aim of the study was to determine the degree of improvement obtained by using Xe-127 as the imaging agent compared to Xe-133 for rCBF SPECT. The SIMIND Monte Carlo code was used to simulate projections of gray and white matter at a ratio of 4:1 using a realistic voxelized anthropomorphic brain phantom. Xe-133 and Xe-127 were simulated using high-sensitivity and medium-energy collimators respectively. Data were acquired into 64 projections of 128/spl times/128 matrix size. A Tc-99m HMPAO study was simulated as reference. Contrast calculations yielded values of 2.1:1, 1.8:1, and 1.3:1 between gray and white matter for Tc-99m, Xe-127, and Xe-133 respectively. A normalized profile through a transverse mid-brain slice demonstrates the improvement in resolution with Xe-127 compared to Xe-133. The difference in resolution between Tc-99m and Xe-127 are less pronounced. Further investigation is needed to study the noise characteristics of both Xenon isotopes for clinical rCBF studies. With Xe-127 and an optimized medium-energy high-resolution fan-beam collimator, it is likely that a notable increase in quantitative accuracy of rCBF estimation can be realized. |
| Starting Page | 1005 |
| Ending Page | 1008 |
| File Size | 378688 |
| Page Count | 4 |
| File Format | |
| ISBN | 0780356969 |
| ISSN | 10823654 |
| DOI | 10.1109/NSSMIC.1999.845831 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1999-10-24 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Single photon emission computed tomography Brain modeling Xenon Monte Carlo methods Biomedical imaging Collimators Isotopes Electromagnetic scattering Particle scattering Positron emission tomography |
| Content Type | Text |
| Resource Type | Article |
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