BioMed Research International

Research Article

Evaluation of Deformable Image Registration Methods for Dose Monitoring in Head and Neck Radiotherapy

Table 1

Summary of all the 10 tested DIR methods, comprising a combination of one registration method, one preprocessing or not CT images and one metric.
  Rigid MSEDemon MSE Demon MSE Filtered CTsDemon D. MapsDemon MIDemon MI filtered CTsFFD MSEFFD MSE filtered CTsFFD D. mapsFFD MIFFD MI filtered CTs
Registration methodRigidX          
Demons XXXXX     
FFD (B-Spline)      XXXXX
Input dataOriginal CTsXX  X X  X 
Filtered CTs  X  X X  X
Delineation Maps   X    X  
MetricMean squared error (MSE)XXXX  XXX  
Mutual information (MI)    XX   XX
A rigid method has been also evaluated for the comparison.
FFD: free form deformation, MSE: mean squared error, MI: mutual information, and CT: computed tomography (scan).