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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Miyaoka, R.S. Tao Ling Lockhart, C. Xiaoli Li Lewellen, T.K. |
| Copyright Year | 1963 |
| Abstract | We report on methods to speed up the calibration process for a continuous miniature crystal element (cMiCE) detector. Our cMiCE detector is composed of a 50-mm by 50-mm by 8-mm-thick monolithic LYSO crystal coupled to a 64-channel, flat-panel photomultiplier tube (PMT). It achieves an average intrinsic spatial resolution of ~1.4 mm full width at half maximum (FWHM) over the useful face of the detector through the use of a statistics-based positioning algorithm. A drawback to the design is the length of time it takes to calibrate the detector. We report on three methods to speed up this process. The first method is to use multiple point fluxes on the surface of the detector to calibrate different points of the detector from a single data acquisition. A special multisource device that can produce up to 16 point fluxes has been custom designed for this purpose. The second scheme is to characterize the detector with coarser sampling and use interpolation to create lookup tables with the desired detector binning (e.g., 0.253 mm). The intrinsic spatial resolution performance was investigated for sampling intervals of 1.013, 2.026, 3.039, and 4.052 mm. The third method is to adjust the point flux diameter by varying the geometry of the setup. A larger point flux diameter will increase the coincidence counting rate. The average intrinsic spatial resolution was 1.38 mm FWHM using four point fluxes, 1.013 mm detector sampling, and ~0.5 mm point flux on the surface of the detector. The average intrinsic spatial resolution increased slightly to 1.45 mm FWHM when using 16 point fluxes with a detector sampling of 3.039 mm. Adjusting the point flux size degraded the intrinsic spatial resolution the most (~9%) and provided the smallest speed up factor. In conclusion using 16 point fluxes and a sampling interval of 3.039 mm, the characterization time for a cMiCE detector can be reduced by a factor of 144 with minimal impact on the intrinsic spatial resolution of the detector. |
| Sponsorship | IEEE Nuclear and Plasma Sciences Society Computer Applications in Nuclear and Plasma Sciences (CANPS) Lawrence Berkeley Lab. Lawrence Livermore Nat. Lab. APS College of William and Mary Continuous Electron Beam Accelerator Facility NASA Defence Nuclear Agency Sandia National Laboratories Jet Propulsion Laboratory Brookhaven Nat. Lab. Lawrence Livermore Nat. Lab IEEE/NPPS Radiat. Effects Committee Defence Nuclear Agency/DoD Sandia National Laboratories/DOE Jet Propulsion Laboratory/NASA Phillips Lab./DoD |
| Starting Page | 1023 |
| Ending Page | 1028 |
| Page Count | 6 |
| File Size | 1092822 |
| File Format | |
| ISSN | 00189499 |
| Volume Number | 57 |
| Issue Number | 3 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2010-06-01 |
| Publisher Place | U.S.A. |
| Access Restriction | One Nation One Subscription (ONOS) |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Calibration Detectors Spatial resolution Sampling methods Face detection Photomultipliers Data acquisition Interpolation Table lookup Geometry PET detector continuous crystal high spatial resolution |
| Content Type | Text |
| Resource Type | Article |
| Subject | Nuclear and High Energy Physics Electrical and Electronic Engineering Nuclear Energy and Engineering |
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