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. Author manuscript; available in PMC: 2016 Jun 1.
Published in final edited form as: Acad Radiol. 2015 Mar 14;22(6):722–733. doi: 10.1016/j.acra.2015.01.007

Figure 1.

Figure 1

Pictorial representation of volume subdivision registration algorithm used with GPU acceleration. The algorithm begins with a rigid registration between the two volumes. In every subsequent level, every volume is divided into eight subvolumes and an independent rigid registration takes places between corresponding subvolumes. By repeating the division and registration process, local displacements due to deformations can be determined.