Fig. 1
From: Improved quantitation and reproducibility in multi-PET/CT lung studies by combining CT information
Schematic of the method to combine the CT data. 1, 2 and 3 represent the CT images from the early, mid and late study sections; C is the resulting combined-CT image; and V is the concentration in the voxel of interest. The white boxes represent specific voxels that are filled in either one, two or all of the CT images after registration. The grey areas at the edges of CT 2 and 3 are the result of registration