the .obj model file is offset far from the world origin,However, it is still possible to achieve position-based interaction between the image and the model

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I have a set of matching .nii image files and .obj model files. After importing them into 3D Slicer, I found that the .obj model file is offset far from the world origin, basically out of the image’s range in the world coordinate system. However, it is still possible to achieve position-based interaction between the image and the model. How is this accomplished?

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This is a localization function I wrote using VTK, but the reference point for localization is based on the world coordinate origin. However, the results are not very ideal.

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The question has been also posted on the Slicer forum and being discussed there: