BioMed Research International / 2014 / Article / Fig 2

Research Article

Motion Freeze for Respiration Motion Correction in PET/CT: A Preliminary Investigation with Lung Cancer Patient Data

Figure 2

Example of deformable image registration using the 3D optical flow method to map the T5% PET to T55% PET. (a) A coronal view of the normal end-inspiration CT (T5%, original image) of 4D-CT. (b) The corresponding slice of the location in (a) at end-expiration CT (T55%, reference image) of 4D CT. (c) The calculated deformation vectors for the registration of original image to the reference. (d) The corresponding T5% PET with the 3D OFM deformation vectors superimposed.