Commissariat a L'energie Atomique

Jerome De Murcia

Pierre Grangeat

The present invention consists of obtaining from a series of measurements or original images of varying precision of a mobile object, such as a beating heart, a sequence of restored images minimizing an error function comprising an adequation term between the restored images and the measurements, a space moving term of images to be restored and a time smoothing term of restored images, taking account of an evaluation of the movement of the object between the original image during the considered phase of the movement and the image of the object in a neighboring phase.

Process for producing a restored sequence of images of a moving object

Tomographic process for the reconstruction of three-dimensional images of an object such as the heart or another organ on the basis of sets of measurements relative to a group of different states of the object. An approximate image of the object in each state (f) is reconstituted on the basis of associated measurements and the movements of said object from a reference state to each of the states are evaluated (D.sub.k). The estimation of the image of the object at the reference state (f.sub.0) is obtained by a convergence towards the real image by gradually incorporating in the estimated image information relative to the measurements and to the previously calculated movements of the object.

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Lyons, France

Jerome De Murcia