A method for registration of whole body volume images, the method comprising the steps of: - obtaining a first image and a second image; said first image being a whole body volume image comprising water and fat magnetic resonance image data and said second image being a whole body volume image comprising water and fat magnetic resonance image data; - identifying bone tissue from said first image creating a first bone image, and identifying bone tissue from said second image creating a second bone image; and the method characterized by the steps of: - separating water components from said first image, generating a first water image based on absolute water content, and separating water components from said second image, generating a second water image based on absolute water content; - separating fat components from said first image, generating a first fat image based on absolute fat content, and separating fat components from said second image, generating a second fat image based on absolute fat content; and - registering said first image to said second image by deforming said first bone image according to a bone tissue deformation rule, deforming said first water image according to a water tissue deformation rule under constraints of said deformation of said first bone image and deforming said first fat image according to a fat tissue deformation rule under constraints of said deformation of said first bone image and said deformation of said first water image. - obtaining a first image and a second image; said first image being a whole body volume image comprising water and fat magnetic resonance image data and said second image being a whole body volume image comprising water and fat magnetic resonance image data; - identifying bone tissue from said first image creating a first bone image, and identifying bone tissue from said second image creating a second bone image; and the method characterized by the steps of: - separating water components from said first image, generating a first water image based on absolute water content, and separating water components from said second image, generating a second water image based on absolute water content; - separating fat components from said first image, generating a first fat image based on absolute fat content, and separating fat components from said second image, generating a second fat image based on absolute fat content; and - registering said first image to said second image by deforming said first bone image according to a bone tissue deformation rule, deforming said first water image according to a water tissue deformation rule under constraints of said deformation of said first bone image and deforming said first fat image according to a fat tissue deformation rule under constraints of said deformation of said first bone image and said deformation of said first water image. - separating water components from said first image, generating a first water image based on absolute water content, and separating water components from said second image, generating a second water image based on absolute water content; - separating fat components from said first image, generating a first fat image based on absolute fat content, and separating fat components from said second image, generating a second fat image based on absolute fat content; and - registering said first image to said second image by deforming said first bone image according to a bone tissue deformation rule, deforming said first water image according to a water tissue deformation rule under constraints of said deformation of said first bone image and deforming said first fat image according to a fat tissue deformation rule under constraints of said deformation of said first bone image and said deformation of said first water image.