Abstract
The choice of lower energy threshold in fully-3D positron emission tomography is influenced by two conflicting considerations. The threshold should be as low as possible to accept as many true events with inaccurately measured energies as possible, and it should be as high as possible to reject as many scattered events as possible. A study was performed to assess this trade-off by evaluating the coefficient of variation of reconstructed images as a function of lower energy threshold. We show that the coefficient of variation is relatively constant for lower energy thresholds below 420 keV, leading to the conclusion that it should be set at the high end of this range to minimize scatter correction errors.
This work was supported by grant number CA54959 from the National Cancer Institute of the National Institutes of Health.
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© 1996 Springer Science+Business Media Dordrecht
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Ollinger, J.M. (1996). The Effect of Energy Threshold on Image Variance in Fully 3D PET. In: Grangeat, P., Amans, JL. (eds) Three-Dimensional Image Reconstruction in Radiology and Nuclear Medicine. Computational Imaging and Vision, vol 4. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-8749-5_19
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DOI: https://doi.org/10.1007/978-94-015-8749-5_19
Publisher Name: Springer, Dordrecht
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