Comparative Assessment of Energy-Mapping Approaches in CT-Based Attenuation Correction for PET |
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| Authors: | Ay Mohammad R. Shirmohammad Maryam Sarkar Saeed Rahmim Arman Zaidi Habib |
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| Affiliation: | (1) Department of Medical Physics and Biomedical Engineering, Tehran University of Medical Sciences, Tehran, Iran;(2) Research Center for Science and Technology in Medicine, Tehran University of Medical Sciences, Tehran, Iran;(3) Research Institute for Nuclear Medicine, Tehran University of Medical Sciences, Tehran, Iran;(4) Department of Radiology, School of Medicine, Johns Hopkins University, Baltimore, MD 21287, USA;(5) Division of Nuclear Medicine, Geneva University Hospital, CH-1211 Geneva 4, Switzerland;(6) Geneva Neuroscience Center, Geneva University, CH-1205 Geneva, Switzerland |
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| Abstract: | Introduction Reliable quantification in positron emission tomography (PET) requires accurate attenuation correction of emission data, which in turn entails accurate determination of the attenuation map (μ-map) of the object under study. One of the main steps involved in CT-based attenuation correction (CTAC) is energy-mapping, or the conversion of linear attenuation coefficients (μ) calculated at the effective CT energy to those corresponding to 511 keV. |
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