The effect of camera geometry on singles flux, scatter fraction and trues and randoms sensitivity for cylindrical 3D PET-a simulation study
Preliminary results of an assessment of the effects of changing the axial field of view (AFOV) and detector ring diameter (DRD) of a cylindrical PET tomograph on count rate performance are presented. The assessment was made using Monte Carlo simulations of an anthropomorphic phantom based on the Zub...
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creator | Badawi, R.D. Kohlmyer, S.G. Harrison, R.L. Vannoy, S.D. Lewellen, T.K. |
description | Preliminary results of an assessment of the effects of changing the axial field of view (AFOV) and detector ring diameter (DRD) of a cylindrical PET tomograph on count rate performance are presented. The assessment was made using Monte Carlo simulations of an anthropomorphic phantom based on the Zubal phantom. This phantom was modified to include cylinders approximating arms and legs, and was sequentially stepped through the AFOV to simulate a whole-body scan covering an axial region of interest of 1 m. DRD was varied from /spl sim/60 cm to /spl sim/108 cm, and AFOV was varied from 10 cm to 60 cm. A simple activity distribution and dead time model was assumed to allow the calculation of noise-equivalent count (NEC) rates for a situation similar to that of a typical 18F-FDG study. Both the scatter fraction and singles flux were found to be strongly dependent on DRD, but only weakly dependent on AFOV when the latter was greater than /spl sim/25 cm. Trues and randoms sensitivity were strongly dependent on AFOV, and randoms sensitivity was also strongly dependent on DRD. Scatter and singles flux do not appear to be limiting factors for extended AFOV configurations, and randoms rates, while high, appear to be manageable with existing detector technology. This initial assessment suggests that for whole-body applications, substantial gains in NEC may be possible by extending the AFOV. |
doi_str_mv | 10.1109/NSSMIC.1999.842848 |
format | Conference Proceeding |
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The assessment was made using Monte Carlo simulations of an anthropomorphic phantom based on the Zubal phantom. This phantom was modified to include cylinders approximating arms and legs, and was sequentially stepped through the AFOV to simulate a whole-body scan covering an axial region of interest of 1 m. DRD was varied from /spl sim/60 cm to /spl sim/108 cm, and AFOV was varied from 10 cm to 60 cm. A simple activity distribution and dead time model was assumed to allow the calculation of noise-equivalent count (NEC) rates for a situation similar to that of a typical 18F-FDG study. Both the scatter fraction and singles flux were found to be strongly dependent on DRD, but only weakly dependent on AFOV when the latter was greater than /spl sim/25 cm. Trues and randoms sensitivity were strongly dependent on AFOV, and randoms sensitivity was also strongly dependent on DRD. Scatter and singles flux do not appear to be limiting factors for extended AFOV configurations, and randoms rates, while high, appear to be manageable with existing detector technology. This initial assessment suggests that for whole-body applications, substantial gains in NEC may be possible by extending the AFOV.</description><identifier>ISSN: 1082-3654</identifier><identifier>ISBN: 9780780356962</identifier><identifier>ISBN: 0780356969</identifier><identifier>EISSN: 2577-0829</identifier><identifier>DOI: 10.1109/NSSMIC.1999.842848</identifier><language>eng</language><publisher>IEEE</publisher><subject>Anthropomorphism ; Arm ; Cameras ; Detectors ; Geometry ; Imaging phantoms ; Leg ; National electric code ; Scattering ; Whole-body PET</subject><ispartof>1999 IEEE Nuclear Science Symposium. Conference Record. 1999 Nuclear Science Symposium and Medical Imaging Conference (Cat. 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Conference Record. 1999 Nuclear Science Symposium and Medical Imaging Conference (Cat. No.99CH37019)</title><addtitle>NSSMIC</addtitle><description>Preliminary results of an assessment of the effects of changing the axial field of view (AFOV) and detector ring diameter (DRD) of a cylindrical PET tomograph on count rate performance are presented. The assessment was made using Monte Carlo simulations of an anthropomorphic phantom based on the Zubal phantom. This phantom was modified to include cylinders approximating arms and legs, and was sequentially stepped through the AFOV to simulate a whole-body scan covering an axial region of interest of 1 m. DRD was varied from /spl sim/60 cm to /spl sim/108 cm, and AFOV was varied from 10 cm to 60 cm. A simple activity distribution and dead time model was assumed to allow the calculation of noise-equivalent count (NEC) rates for a situation similar to that of a typical 18F-FDG study. Both the scatter fraction and singles flux were found to be strongly dependent on DRD, but only weakly dependent on AFOV when the latter was greater than /spl sim/25 cm. Trues and randoms sensitivity were strongly dependent on AFOV, and randoms sensitivity was also strongly dependent on DRD. Scatter and singles flux do not appear to be limiting factors for extended AFOV configurations, and randoms rates, while high, appear to be manageable with existing detector technology. This initial assessment suggests that for whole-body applications, substantial gains in NEC may be possible by extending the AFOV.</description><subject>Anthropomorphism</subject><subject>Arm</subject><subject>Cameras</subject><subject>Detectors</subject><subject>Geometry</subject><subject>Imaging phantoms</subject><subject>Leg</subject><subject>National electric code</subject><subject>Scattering</subject><subject>Whole-body PET</subject><issn>1082-3654</issn><issn>2577-0829</issn><isbn>9780780356962</isbn><isbn>0780356969</isbn><fulltext>true</fulltext><rsrctype>conference_proceeding</rsrctype><creationdate>1999</creationdate><recordtype>conference_proceeding</recordtype><sourceid>6IE</sourceid><sourceid>RIE</sourceid><recordid>eNotkNtKAzEQhoMHsNS-QK_yAG5NsjleSq1aqAdovS7ZbFIje5AkK-4z-NJG688w_zAzfBc_AHOMFhgjdf203T6ulwuslFpISiSVJ2BCmBAFkkSdgpkSEuUqGVecnIEJzvui5IxegFmM7yiLMio4moDv3ZuF1jlrEuwdNLq1QcOD7Vubwgj7DkbfHRoboWuGrysYjU7JBuiCNsnns-5qmMKQH36nkFvfRhhtF33ynz6N0PUBmrHxXR280Q0sb-HLalfoTG6HRv9RYhrq8RKcO91EO_v3KXi9W-2WD8Xm-X69vNkUBrMyFVwoRurScIVlRRw1GhPMtZUMMWWoqiohNaWCSoSNFIJTrpnmHFNCDatQOQXzI9dba_cfwbc6jPtjkuUPwVZmpQ</recordid><startdate>1999</startdate><enddate>1999</enddate><creator>Badawi, R.D.</creator><creator>Kohlmyer, S.G.</creator><creator>Harrison, R.L.</creator><creator>Vannoy, S.D.</creator><creator>Lewellen, T.K.</creator><general>IEEE</general><scope>6IE</scope><scope>6IH</scope><scope>CBEJK</scope><scope>RIE</scope><scope>RIO</scope></search><sort><creationdate>1999</creationdate><title>The effect of camera geometry on singles flux, scatter fraction and trues and randoms sensitivity for cylindrical 3D PET-a simulation study</title><author>Badawi, R.D. ; Kohlmyer, S.G. ; Harrison, R.L. ; Vannoy, S.D. ; Lewellen, T.K.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c153t-67952d3c6918b2f4ca1216ae85059c49bb78a4474801c877646a5a661424c5b03</frbrgroupid><rsrctype>conference_proceedings</rsrctype><prefilter>conference_proceedings</prefilter><language>eng</language><creationdate>1999</creationdate><topic>Anthropomorphism</topic><topic>Arm</topic><topic>Cameras</topic><topic>Detectors</topic><topic>Geometry</topic><topic>Imaging phantoms</topic><topic>Leg</topic><topic>National electric code</topic><topic>Scattering</topic><topic>Whole-body PET</topic><toplevel>online_resources</toplevel><creatorcontrib>Badawi, R.D.</creatorcontrib><creatorcontrib>Kohlmyer, S.G.</creatorcontrib><creatorcontrib>Harrison, R.L.</creatorcontrib><creatorcontrib>Vannoy, S.D.</creatorcontrib><creatorcontrib>Lewellen, T.K.</creatorcontrib><collection>IEEE Electronic Library (IEL) Conference Proceedings</collection><collection>IEEE Proceedings Order Plan (POP) 1998-present by volume</collection><collection>IEEE Xplore All Conference Proceedings</collection><collection>IEEE Electronic Library (IEL)</collection><collection>IEEE Proceedings Order Plans (POP) 1998-present</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Badawi, R.D.</au><au>Kohlmyer, S.G.</au><au>Harrison, R.L.</au><au>Vannoy, S.D.</au><au>Lewellen, T.K.</au><format>book</format><genre>proceeding</genre><ristype>CONF</ristype><atitle>The effect of camera geometry on singles flux, scatter fraction and trues and randoms sensitivity for cylindrical 3D PET-a simulation study</atitle><btitle>1999 IEEE Nuclear Science Symposium. Conference Record. 1999 Nuclear Science Symposium and Medical Imaging Conference (Cat. No.99CH37019)</btitle><stitle>NSSMIC</stitle><date>1999</date><risdate>1999</risdate><volume>3</volume><spage>1522</spage><epage>1526 vol.3</epage><pages>1522-1526 vol.3</pages><issn>1082-3654</issn><eissn>2577-0829</eissn><isbn>9780780356962</isbn><isbn>0780356969</isbn><abstract>Preliminary results of an assessment of the effects of changing the axial field of view (AFOV) and detector ring diameter (DRD) of a cylindrical PET tomograph on count rate performance are presented. The assessment was made using Monte Carlo simulations of an anthropomorphic phantom based on the Zubal phantom. This phantom was modified to include cylinders approximating arms and legs, and was sequentially stepped through the AFOV to simulate a whole-body scan covering an axial region of interest of 1 m. DRD was varied from /spl sim/60 cm to /spl sim/108 cm, and AFOV was varied from 10 cm to 60 cm. A simple activity distribution and dead time model was assumed to allow the calculation of noise-equivalent count (NEC) rates for a situation similar to that of a typical 18F-FDG study. Both the scatter fraction and singles flux were found to be strongly dependent on DRD, but only weakly dependent on AFOV when the latter was greater than /spl sim/25 cm. Trues and randoms sensitivity were strongly dependent on AFOV, and randoms sensitivity was also strongly dependent on DRD. Scatter and singles flux do not appear to be limiting factors for extended AFOV configurations, and randoms rates, while high, appear to be manageable with existing detector technology. This initial assessment suggests that for whole-body applications, substantial gains in NEC may be possible by extending the AFOV.</abstract><pub>IEEE</pub><doi>10.1109/NSSMIC.1999.842848</doi></addata></record> |
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identifier | ISSN: 1082-3654 |
ispartof | 1999 IEEE Nuclear Science Symposium. Conference Record. 1999 Nuclear Science Symposium and Medical Imaging Conference (Cat. No.99CH37019), 1999, Vol.3, p.1522-1526 vol.3 |
issn | 1082-3654 2577-0829 |
language | eng |
recordid | cdi_ieee_primary_842848 |
source | IEEE Electronic Library (IEL) Conference Proceedings |
subjects | Anthropomorphism Arm Cameras Detectors Geometry Imaging phantoms Leg National electric code Scattering Whole-body PET |
title | The effect of camera geometry on singles flux, scatter fraction and trues and randoms sensitivity for cylindrical 3D PET-a simulation study |
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