| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Off-Axis Imaging in Keel-Edge Pinhole Single Photon Emission Computed Tomography System Based on Monte Carlo Simulation |
| Su-Ying Li1**, Zhao-Heng Xie1**, Zhi-Yu Huang1, Kun Yang2, Bai-Xuan Xu3, Qiu-Shi Ren1 |
1Department of Biomedical Engineering, College of Engineering, Peking University, Beijing 100871
2Department of Control Technology and Instrumentation, College of Quality and Technical Supervision, Hebei University, Hebei 071002
3General Hospital of Chinese People's Liberation Army, Beijing 100039
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| Cite this article: |
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Su-Ying Li, Zhao-Heng Xie, Zhi-Yu Huang et al 2016 Chin. Phys. Lett. 33 048701 |
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Abstract Monte Carlo simulation is applied to investigate the off-axis effect in keel-edge pinhole single photon emission computed tomography imaging. Aiming at finding the effective field of view (FOV) for imaging, we simulate point source in off-axis imaging (0, 4, 8 and 12 mm from the central rotation axis) of different collimator designs (channel height with 1.38, 1 and 0.5 mm) with a fixed aperture diameter. Tradeoff curves of rms resolution and sensitivity are plotted to determine the effective FOV for different channel height pinhole collimators. The parameterized model can be further incorporated into image reconstruction algorithms, which compensates for the off-axis effect and is used as a reference for multi-pinhole design.
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Received: 24 December 2015
Published: 29 April 2016
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| PACS: |
87.57.-s
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(Medical imaging)
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87.57.uh
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(Single photon emission computed tomography (SPECT))
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87.57.cp
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(Artifacts and distortion)
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