MOTION COMPENSATION IN FUNCTIONAL IMAGE FORMATION Russian patent published in 2011 - IPC A61B6/03 G01T1/161 G01T1/29 G06T11/00 

FIELD: medicine.

SUBSTANCE: group of inventions refers to medicine and medical equipment. A method of diagnostic image formation involves generation of a set of images of heart in each of a set of phases of breathing and heart with the use of a first technique of image formation; transformation of images which have a common phase of heart and various phases of breathing, in a sequence of images with respiratory motion compensation on a set of phases of heart and on a specified general phase of breathing; transformation of sequence of images with respiratory motion compensation according to a model of cardiac shape and motion for generation of a sequence of images with respiratory and cardiac motion compensation in a specified general phase of heart and in a specified general phase of breathing; and fusion of these images. The method is implemented by using a device for diagnostic image formation comprising a processor. In diagnostic image regeneration, the respiratory and cardiac motions are compensated by following respiratory activity of a subject during image formation by means of nuclear scan, and formation of a respiratory motion vector; following cardiac activity of the subject during scanning; separate accumulation of raw image data collected during scanning, their regeneration in a set of images; image transformations according to the respiratory motion vector; adjustment of resultants of the transformed images according to the cardiac shape and motion; and fusion of these images. A device accommodating a scanner with the use of the first technique of image formation, a breathing adjustment processor, a subprogram of cardiac motion image transformation, a subprogram of heart image summation. The scanner generates a set of heart images in each of the set of phases of breathing and heart. The processor transforms the images of the set of images having a general phase of heart, but different phases of breathing, to a sequence of images with compensation respiratory motion compensation on the on a set of phases of heart on the specified general phase of breathing. The subprogram of cardiac motion image transformation transforms the sequence of compensated respiratory images according to the model of cardiac shape and motion for generation of the sequence of images with respiratory and cardiac motion compensation in the specified general phase of heart and the specified general phase of breathing. The subroutine of subprogram of heart image summation combines the images in the specified general phases of heart and breathing. For motion compensation, data bases of transformation matrixes are generated in medical image formation between selected images; selected image data are collected for a current image which shall be corrected with motion taken into account; image data are regenerated for selected image formation; the transformation matrixes are used for estimation of a current set of the transformation matrixes considering respiratory motion, and a current image compensated with respect to motion on the basis on a current set of the transformation matrixes is generated. The data base is generated on the basis of the image data from a pool of patients wherein the transformation matrixes compensate respiratory motion between related selected images. A medical system of image formation is provided wit a user's interface including an image display and a motion compensation selector.

EFFECT: development of the method and the device for image formation with motion compensation caused by natural respiratory and cardiac cycles.

21 cl, 4 dwg