The Scientific World Journal

Research Article

Automatic PET-CT Image Registration Method Based on Mutual Information and Genetic Algorithms

Figure 2

Typical MI translational pattern obtained by using different interpolation methods and strategies. Translational results for the PV method are shown in the range ±10 mm to illustrate the interpolation artifacts. Translational results for the GPVE, PV + downsampling and PV + upsampling methods are shown in the range ±10 mm for comparison of the pattern obtained against the PV curve. When the second strategy is applied, the downsampling produced a new voxel dimensions = 1 . 1 1 m m × 1 . 1 1 m m × 1 . 1 1 m m , and the upsampling a new voxel dimensions = 0 . 8 9 m m × 0 . 8 9 m m × 0 . 8 9 m m .
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