Model-based registration of cardiac cta and mr acquisitions

Details Model-based registration of cardiac cta and mr acquisitions Model-based registration of cardiac cta and mr acquisitions

G - Physics

06

T

G06T 7/00 (2006.01) G06T 3/00 (2006.01)

Patent

CA 2394192

A method for registration of magnetic resonance (MR) and computed topography (CT) images, in accordance with the present invention includes providing MR images having a region of interest delineated by first contours (blocks 100 and 104) and providing CT images having the region of interest delineated by second contours (blocks 102 and 104). A pre-existing model of the region of interest is also provided (block 106). The pre-existing model is fit to the first contours or the second contours to provide a first resultant model (block 107). The first resultant model is then copied to provide a copied model (block 108). The copied model is fit to the other of the first contours and the second contours to provide a second resultant model (block 108). By rotating and translating the first resultant model and the second resultant model, the first resultant model and the second resultant model are registered (block 110). The rotation and translation information are stored and applied to the images to provide registration between the MR images and the CT images (block 112).

L'invention concerne un procédé destiné à faire concorder des images obtenues par résonance magnétique (MR) et topographie calculée (CT), qui consiste à obtenir des images MR d'une région recherchée délimitée par des premiers contours (pavés 100 et 104) et à obtenir des images CT de la région recherchée délimitée par des seconds contours (pavés 102 et 104). On dispose d'un modèle préexistant (pavé 106) de la région recherchée. Ce modèle est ajusté aux premiers contours ou aux seconds contours afin de donner un premier modèle résultant (pavé 107). Ce premier modèle est ensuite copié afin d'obtenir un modèle copié (pavé 108). Le modèle copié est ajusté à l'autre des premiers et seconds contours afin de donner un second modèle résultant (pavé 108). Par rotation et translation des premier et second modèles résultants, ces premier et seconds modèles sont mis en concordance (pavé 110). Les informations de rotation et de translation sont stockées et appliquées aux images afin de donner une concordance entre les images MR et CT (pavé 112).

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