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In this chapter we consider the principles of the reconstruction of images from projection signals and the associated method of back-project reconstruction. We apply these principles to X-ray Computed Tomography (CT), Single Photon Emission Computed Tomography (SPECT) and Positron Emission Tomography (PET). In doing so, we explore why PET can achieve a higher resolution than SPECT, but require a different device design than needed for X-ray CT and SPECT.

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Back-Projection Reconstruction—X-Ray and PET/SPECT

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  • 发表日期：

    2025年

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  • Michael Chappell

摘要

In this chapter we consider the principles of the reconstruction of images from projection signals and the associated method of back-project reconstruction. We apply these principles to X-ray Computed Tomography (CT), Single Photon Emission Computed Tomography (SPECT) and Positron Emission Tomography (PET). In doing so, we explore why PET can achieve a higher resolution than SPECT, but require a different device design than needed for X-ray CT and SPECT.