Abstract
Single photon emission computed tomography (SPECT) provides functional information of the interested organs. Such information is very helpful in the early detection of diseases. However, the resolution of SPECT is low. The cone-beam SPECT reconstruction can improve the photon density and spatial resolution of the reconstructed image. In practice, because of the data sufficiency and scanning efficiency, helical cone-beam geometry is preferred. The iterative helical cone-beam reconstruction is time-consuming; the analytical methods are considerably faster and more efficient in clinic. Due to the attenuation of gamma photons, the analytical SPECT reconstruction problem is more complicated. Attenuation should be compensated for to obtain quantitative results. In this paper, based on the Novikov's reconstruction formula and our Ray-driven Technology, we present an analytical SPECT reconstruction algorithm for helical cone-beam geometry using Ray-driven Technology. The simulation results demonstrate the accuracy and robustness of our method.
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