Patent ID: 8086010

Claim:
A medical image diagnosis apparatus, comprising: a patient table; a data acquisition part configured to scan the patient table in a non-loaded state in which an object is not placed on the patient table to acquire first scan data and to scan the patient table and an object in a loaded state in which the object is placed on the patient table to acquire second scan data; an image data-forming part configured to form a first image based on the first scan data and a second image based on the second scan data; a displacement calculation part configured to calculate displacement of the patient table in the non-loaded state and in the loaded state based on the first image and the second image; and a correction part configured to correct the position of the second image based on the displacement, wherein the image data-forming part is configured to form the first image including a tomographic image of the patient table; and form the second image including the tomographic image of the patient table and the tomographic image of the object, wherein the displacement calculation part is configured to determine the position of the tomographic image of the patient table in the first image based on the first image; determine the position of the tomographic image of the patient table in the second image based on the second image; and calculate the difference of the determined positions of the tomographic images of the patient table for the first image and the second image, respectively, as the displacement, the apparatus further comprising a patient table drive configured to move the patient table in a specified patient table moving direction, wherein a plurality of reference positions in the specified patient table moving direction are preset for the patient table, and for each of the plurality of reference positions, the image data-forming part is configured to form the first image including a tomographic image of the patient table at said reference position; and form the second image including the tomographic image of the patient table and the tomographic image of the object at said reference position, and the displacement calculation part is configured to for each of the plurality of reference positions, calculate the difference between positions of the tomographic image of the patient table of the first image and the second image as the displacement at said reference position; and calculate displacement at an intermediate position of two adjacent reference positions of the plurality of reference positions based on each of said displacements of the two reference positions; and the correction part corrects the position of second image at the intermediate position based on displacement at the intermediate position.