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EJNMMI Research

Table 1 Overview of the registration strategies

From: Effects of rigid and non-rigid image registration on test-retest variability of quantitative [18F]FDG PET/CT studies

 

Registration

 

Input for registration

Transformation

Program

Similarity measure

Input data

Focus

Rigid

Elastix

SSD

PET

Global

  

NCC

 

Semi-local

  

MI

 

Local

 

RegisRigid

SSD

NAC

Global

  

NCC

 

Semi-local

  

MI

 

Local

Non-rigid

Elastix

SSD

CT

Global

  

NCC

 

Semi-local

  

MI

 

Local

 

splineMIRIT

SSD

CTPETa

Global

  

NCC

 

Semi-local

  

MI

 

Local

  1. aCTPET is used for non-rigid registrations only; SSD = summed squared differences; NCC = normalized cross correlation; MI = mutual information
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