1. Method for correcting an acquired medical image of a patient having an internal body structure, said acquired image having a region of interest showing a representation of said internal body structure, said acquired image having been acquired in a medical imager having a radiation source and a radiation detector spaced from one another along an image-taking direction, and between which the patient is disposed, wherein the method comprises: a) obtaining, from the acquired image, a corrected image taking into account a position of the internal body structure along the image-taking direction.