Improving the Convergence Rate in Affine Registration of PET and SPECT Brain Images Using Histogram Equalization

<table>(a) Reference PET template. (b) Source PET brain image. (c) Source image normalized to the greater value of reference PET template. (d) Enhanced image using histogram matching.</table>

Computational and Mathematical Methods in Medicine

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Figure 2

Figure 2: Improving the Convergence Rate in Affine Registration of PET and SPECT Brain Images Using Histogram Equalization 