Image registration device and method, image segmentation device and method and medical image apparatus

An image segmentation devices device, comprising:

• a rigid registration unit configured to perform a rigid registration of a first input image with a second input image, which is a reference, to obtain first deformation information;
• a first non-rigid registration unit configured to perform a first non-rigid registration of the first input image with the second input image by taking the first deformation information as the initial deformation information to obtain second deformation information;
• a second non-rigid registration unit configured to perform a second non-rigid registration of the first input image with the second input image by taking the second deformation information as the initial deformation information to obtain third deformation information;
• an image warping unit configured to superpose the third deformation information obtained by the image registration unit on the first or second input image to generate a registered image;
• and
• an image labeling unit configured to label a region of interest on the registered image according to a third input image which is obtained by labeling a predetermined region of interest on the second input image.

An image registration method, comprising:

• performing a rigid registration of a first input image with a second input image, which is a reference, to obtain first deformation information;
• performing a first non-rigid registration of the first input image with the second input image by taking the first deformation information as the initial deformation information to obtain second deformation information;
• and
• performing a second non-rigid registration of the first input image with the second input image by taking the second deformation information as the initial deformation information to obtain third deformation information.

An image segmentation method, comprising:

• performing a rigid registration of a first input image with a second input image, which is a reference, to obtain first deformation information;
• performing a first non-rigid registration of the first input image with the second input image by taking the first deformation information as the initial deformation information to obtain second deformation information;
• performing a second non-rigid registration of the first input image with the second input image by taking the second deformation information as the initial deformation information to obtain third deformation information;
• superposing the third deformation information on the first or second input image to generate a registered image;
• and
• labeling a region of interest on the registered image according to a third input image which is obtained by labeling a predetermined region of interest on the second input image.