Method and system for model based fusion on pre-operative computed tomography and intra-operative fluoroscopy using transesophageal echocardiography

US9155470B2 · kind B2 · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Sasa Grbic · Plainsboro, US
• Peter Mountney · London, GB
• Razvan Ioan Ionasec · Lawrenceville, US
• Matthias John · Nuremberg, DE
• Jan Boese · Eckental, DE
• Dorin Comaniciu · Princeton Junction, US

Key dates

• Filing date: Jan 15, 2013
• Grant date: Oct 13, 2015
• Expiry date: Aug 20, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T2207/20221
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A method and system for model-based fusion of pre-operative image data and intra-operative fluoroscopic images is disclosed. A fluoroscopic image and an ultrasound image are received. The ultrasound image is mapped to a 3D coordinate system of a fluoroscopic image acquisition device used to acquire the fluoroscopic image. Contours of an anatomical structure are detected in the ultrasound image, and a transformation is calculated between the ultrasound image and a pre-operative CT image based on the contours and a patient-specific physiological model extracted from the pre-operative CT image. A final mapping is determined between the CT image and the fluoroscopic image based on the transformation between the ultrasound image and physiological model and the mapping of the ultrasound image to the 3D coordinate system of the fluoroscopic image acquisition device. The CT image or the physiological model can then be projected into the fluoroscopic image.