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Wu, C. (author), Gratama van Andel, H.A. (author), Laverman, P. (author), Boerman, O.C. (author), Beekman, F.J. (author)Background In single-photon emission computed tomography (SPECT), attenuation of photon flux in tissue affects quantitative accuracy of reconstructed images. Attenuation maps derived from X-ray computed tomography (CT) can be employed for attenuation correction. The attenuation coefficients as well as registration accuracy between SPECT and CT...journal article 2013