Mosaic designs for extending PET axial fields of view

CHENG Li; WEI Qingyang; XIA Yan; SHANG Hong; LIU Yaqiang; WU Chaoxia; MA Tianyu

doi:10.16511/j.cnki.qhdxxb.2015.24.011

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Journal of Tsinghua University(Science and Technology) ›› 2015, Vol. 55 ›› Issue (12) : 1335-1341. DOI: 10.16511/j.cnki.qhdxxb.2015.24.011

PHYSICS AND ENGINEERING PHYSICS

Mosaic designs for extending PET axial fields of view

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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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positron emission tomography (PET) / mosaic designs / spatial resolution / energy threshold

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CHENG Li, WEI Qingyang, XIA Yan, SHANG Hong, LIU Yaqiang, WU Chaoxia, MA Tianyu. Mosaic designs for extending PET axial fields of view[J]. Journal of Tsinghua University(Science and Technology). 2015, 55(12): 1335-1341 https://doi.org/10.16511/j.cnki.qhdxxb.2015.24.011

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