Geometrical parameters and scattered radiation effects on the extrinsic sensitivity and counting efficiency of a rectangular gamma camera
A point source is used to investigate the effect of water phantom thickness and source-to-detector distance (SDD) on the sensitivity and counting efficiency of a rectangular detector gamma camera. The increase in water thickness resulted in an increase in scatter fraction, a decrease in sensitivity,...
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| Veröffentlicht in: | Applied radiation and isotopes 2016-12, Vol.118, p.131-135 |
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| container_title | Applied radiation and isotopes |
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| creator | Ghoneim, Mohamed A. Khedr, M.H. Elshemey, Wael M. |
| description | A point source is used to investigate the effect of water phantom thickness and source-to-detector distance (SDD) on the sensitivity and counting efficiency of a rectangular detector gamma camera. The increase in water thickness resulted in an increase in scatter fraction, a decrease in sensitivity, and counting efficiency. The increase in SDD resulted in a decrease in sensitivity and an increase in counting efficiency. An SDD of 0.79±0.02m is found to provide a good compromise for acceptable sensitivity and reasonable counting efficiency.
•Energy spectrum of a point source is acquired using a rectangular detector, at different scattering medium thicknesses.•The scatter fraction, solid angle, extrinsic sensitivity and counting efficiency are calculated.•A comparison of measurements with a flood source case is provided.•An optimum source-to-detector distance is suggested for acceptable sensitivity and counting efficiency. |
| doi_str_mv | 10.1016/j.apradiso.2016.09.006 |
| format | Article |
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•Energy spectrum of a point source is acquired using a rectangular detector, at different scattering medium thicknesses.•The scatter fraction, solid angle, extrinsic sensitivity and counting efficiency are calculated.•A comparison of measurements with a flood source case is provided.•An optimum source-to-detector distance is suggested for acceptable sensitivity and counting efficiency.</description><identifier>ISSN: 0969-8043</identifier><identifier>EISSN: 1872-9800</identifier><identifier>DOI: 10.1016/j.apradiso.2016.09.006</identifier><identifier>PMID: 27640173</identifier><language>eng</language><publisher>England: Elsevier Ltd</publisher><subject>Calibration ; Counting efficiency ; Extrinsic sensitivity ; Gamma camera ; Scattered fraction</subject><ispartof>Applied radiation and isotopes, 2016-12, Vol.118, p.131-135</ispartof><rights>2016 Elsevier Ltd</rights><rights>Copyright © 2016 Elsevier Ltd. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c368t-84dd605cc87feae55567af560a8c20878f59297e6011a12bc5387d3ef1e21a003</citedby><cites>FETCH-LOGICAL-c368t-84dd605cc87feae55567af560a8c20878f59297e6011a12bc5387d3ef1e21a003</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.apradiso.2016.09.006$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,778,782,3539,27911,27912,45982</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/27640173$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Ghoneim, Mohamed A.</creatorcontrib><creatorcontrib>Khedr, M.H.</creatorcontrib><creatorcontrib>Elshemey, Wael M.</creatorcontrib><title>Geometrical parameters and scattered radiation effects on the extrinsic sensitivity and counting efficiency of a rectangular gamma camera</title><title>Applied radiation and isotopes</title><addtitle>Appl Radiat Isot</addtitle><description>A point source is used to investigate the effect of water phantom thickness and source-to-detector distance (SDD) on the sensitivity and counting efficiency of a rectangular detector gamma camera. The increase in water thickness resulted in an increase in scatter fraction, a decrease in sensitivity, and counting efficiency. The increase in SDD resulted in a decrease in sensitivity and an increase in counting efficiency. An SDD of 0.79±0.02m is found to provide a good compromise for acceptable sensitivity and reasonable counting efficiency.
•Energy spectrum of a point source is acquired using a rectangular detector, at different scattering medium thicknesses.•The scatter fraction, solid angle, extrinsic sensitivity and counting efficiency are calculated.•A comparison of measurements with a flood source case is provided.•An optimum source-to-detector distance is suggested for acceptable sensitivity and counting efficiency.</description><subject>Calibration</subject><subject>Counting efficiency</subject><subject>Extrinsic sensitivity</subject><subject>Gamma camera</subject><subject>Scattered fraction</subject><issn>0969-8043</issn><issn>1872-9800</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNqFkUFv1DAQhS0EotvCX6h85JIwdtaOcwNVUJAqcYGzNXUmi1dJvNhOxf6E_us6uy1XTuOR3ueneY-xawG1AKE_7ms8ROx9CrUsew1dDaBfsY0wraw6A_CabaDTXWVg21ywy5T2ALA1nXzLLmSrtyDaZsMebylMlKN3OPIDRiwLxcRx7nlymMtCPV-dMPswcxoGcjnx8sy_idPfgs7JO56ojOwffD6eYBeWOft5txLeeZrdkYeBI4-Fx3m3jBj5DqcJuSumEd-xNwOOid4_zyv26-uXnzffqrsft99vPt9VrtEmV2bb9xqUc6YdCEkppVsclAY0ToJpzaA62bWkQQgU8t6pxrR9Q4MgKRCguWIfzv8eYvizUMp28snROOJMYUlWGCW1aiXoItVnqYshpUiDPUQ_YTxaAXatwe7tSw12rcFCZ-EEXj97LPcT9f-wl9yL4NNZQOXSB0_RplNG1Ps1H9sH_z-PJ1JGn6c</recordid><startdate>201612</startdate><enddate>201612</enddate><creator>Ghoneim, Mohamed A.</creator><creator>Khedr, M.H.</creator><creator>Elshemey, Wael M.</creator><general>Elsevier Ltd</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope></search><sort><creationdate>201612</creationdate><title>Geometrical parameters and scattered radiation effects on the extrinsic sensitivity and counting efficiency of a rectangular gamma camera</title><author>Ghoneim, Mohamed A. ; Khedr, M.H. ; Elshemey, Wael M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c368t-84dd605cc87feae55567af560a8c20878f59297e6011a12bc5387d3ef1e21a003</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Calibration</topic><topic>Counting efficiency</topic><topic>Extrinsic sensitivity</topic><topic>Gamma camera</topic><topic>Scattered fraction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ghoneim, Mohamed A.</creatorcontrib><creatorcontrib>Khedr, M.H.</creatorcontrib><creatorcontrib>Elshemey, Wael M.</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><jtitle>Applied radiation and isotopes</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ghoneim, Mohamed A.</au><au>Khedr, M.H.</au><au>Elshemey, Wael M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Geometrical parameters and scattered radiation effects on the extrinsic sensitivity and counting efficiency of a rectangular gamma camera</atitle><jtitle>Applied radiation and isotopes</jtitle><addtitle>Appl Radiat Isot</addtitle><date>2016-12</date><risdate>2016</risdate><volume>118</volume><spage>131</spage><epage>135</epage><pages>131-135</pages><issn>0969-8043</issn><eissn>1872-9800</eissn><abstract>A point source is used to investigate the effect of water phantom thickness and source-to-detector distance (SDD) on the sensitivity and counting efficiency of a rectangular detector gamma camera. The increase in water thickness resulted in an increase in scatter fraction, a decrease in sensitivity, and counting efficiency. The increase in SDD resulted in a decrease in sensitivity and an increase in counting efficiency. An SDD of 0.79±0.02m is found to provide a good compromise for acceptable sensitivity and reasonable counting efficiency.
•Energy spectrum of a point source is acquired using a rectangular detector, at different scattering medium thicknesses.•The scatter fraction, solid angle, extrinsic sensitivity and counting efficiency are calculated.•A comparison of measurements with a flood source case is provided.•An optimum source-to-detector distance is suggested for acceptable sensitivity and counting efficiency.</abstract><cop>England</cop><pub>Elsevier Ltd</pub><pmid>27640173</pmid><doi>10.1016/j.apradiso.2016.09.006</doi><tpages>5</tpages></addata></record> |
| fulltext | fulltext |
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| ispartof | Applied radiation and isotopes, 2016-12, Vol.118, p.131-135 |
| issn | 0969-8043 1872-9800 |
| language | eng |
| recordid | cdi_proquest_miscellaneous_1852657206 |
| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Calibration Counting efficiency Extrinsic sensitivity Gamma camera Scattered fraction |
| title | Geometrical parameters and scattered radiation effects on the extrinsic sensitivity and counting efficiency of a rectangular gamma camera |
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