{"title":"双探测器，非对称锥束螺旋SPECT","authors":"G. L. Zeng, G. Gullberg","doi":"10.1109/NSSMIC.1998.773823","DOIUrl":null,"url":null,"abstract":"Whole-body SPECT (single photon emission computed tomography) with a helical scanning orbit is proposed to replace whole-body planar imaging. In order to correct for attenuation and avoid truncation of projection data, the use of asymmetric cone-beam imaging geometries for simultaneous transmission and emission data acquisition is being investigated. At least two detectors are required in order to provide sufficient cone-beam data. If two detectors are used, they must have opposite geometries, and the data sufficiency condition for the cone-beam geometry is such that when a detector rotates \"/spl pi/ plus fan-angle\", it should shift axially by a, where a is the detector size projected on the axis of rotation. By using Beacon/sup TM/ method, transmission and emission imaging geometries can be different. Various helix pitch requirements are derived here for many imaging geometries and for many detector configurations.","PeriodicalId":129202,"journal":{"name":"1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"1998-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Two-detector, asymmetric cone-beam helical SPECT\",\"authors\":\"G. L. Zeng, G. Gullberg\",\"doi\":\"10.1109/NSSMIC.1998.773823\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Whole-body SPECT (single photon emission computed tomography) with a helical scanning orbit is proposed to replace whole-body planar imaging. In order to correct for attenuation and avoid truncation of projection data, the use of asymmetric cone-beam imaging geometries for simultaneous transmission and emission data acquisition is being investigated. At least two detectors are required in order to provide sufficient cone-beam data. If two detectors are used, they must have opposite geometries, and the data sufficiency condition for the cone-beam geometry is such that when a detector rotates \\\"/spl pi/ plus fan-angle\\\", it should shift axially by a, where a is the detector size projected on the axis of rotation. By using Beacon/sup TM/ method, transmission and emission imaging geometries can be different. Various helix pitch requirements are derived here for many imaging geometries and for many detector configurations.\",\"PeriodicalId\":129202,\"journal\":{\"name\":\"1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)\",\"volume\":\"35 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1998-11-08\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/NSSMIC.1998.773823\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"1998 IEEE Nuclear Science Symposium Conference Record. 1998 IEEE Nuclear Science Symposium and Medical Imaging Conference (Cat. No.98CH36255)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/NSSMIC.1998.773823","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Whole-body SPECT (single photon emission computed tomography) with a helical scanning orbit is proposed to replace whole-body planar imaging. In order to correct for attenuation and avoid truncation of projection data, the use of asymmetric cone-beam imaging geometries for simultaneous transmission and emission data acquisition is being investigated. At least two detectors are required in order to provide sufficient cone-beam data. If two detectors are used, they must have opposite geometries, and the data sufficiency condition for the cone-beam geometry is such that when a detector rotates "/spl pi/ plus fan-angle", it should shift axially by a, where a is the detector size projected on the axis of rotation. By using Beacon/sup TM/ method, transmission and emission imaging geometries can be different. Various helix pitch requirements are derived here for many imaging geometries and for many detector configurations.
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