| PHYSICS AND ENGINEERING PHYSICS |
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Mosaic designs for extending PET axial fields of view |
| CHENG Li1, WEI Qingyang2, XIA Yan3, SHANG Hong4, LIU Yaqiang1, WU Chaoxia1, MA Tianyu1 |
1. Department of Engineering Physics, Tsinghua University, Beijing 100084, China;
2. Department of Electrical Engineering, Tsinghua University, Beijing 100084, China;
3. Key Laboratory of Reliability and Environmental Engineering Technology, Beijing Satellite Environment Engineering Research Institute, Beijing 100000, China;
4. Department of Bioengineering, University of California at Berkeley, Berkeley 94158, USA |
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Abstract There positron emission tomography (PET) mosaic designs were developed from a traditional PET design based on GATE (Geant4 Application for Emission Tomography) simulations using axial sensitivity, volume sensitivity and spatial resolutions with various energy thresholds of 0 keV, 250 keV and 350 keV. The results indicate that without the effect of the energy threshold, the axial sensitivity of the mosaic designs is increased 24%-50%, while the volume sensitivity is increased 47%-62%. With an appropriate energy threshold (250 keV), the axial sensitivity is increased by 12% while the volume sensitivity is increased by 8% to give similar image quality as the traditional design.
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| Keywords
positron emission tomography (PET)
mosaic designs
spatial resolution
energy threshold
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Issue Date: 15 December 2015
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2015,
Vol. 55
