Abstract: While acquiring a tomographic image, the position of patient's head is continuously measured and recorded. For this purpose, several cameras (5) are arranged at the tomograph (1). They measure the position of a reference device (4), which is mounted to the teeth of the patient's upper jaw. Infrared-diodes are arranged on the reference device (4), the position of which is recorded by the cameras (5). This allows to measure the movements of the patient and to compensate for them when generating the tomographic image.

Abstract: The present invention provides a system and process for correlating points on a spatial body to corresponding points on a database body formed from pre-aquired images of the spatial body. The system and process involve matching the spatial points with the corresponding database points using relative positional information between the spatial points and the database points. Symmetric false matches are detected and discarded by fitting the spatial points and database points to a first and second closed body, respectively, and comparing the orientation of the spatial points and the database points projected onto the closed bodies.

Abstract: The present invention provides a system and method for visualizing internal images of an anatomical body. Internal images of the body are acquired by an ultrasound imaging transducer. The position and orientation of the ultrasound imaging transducer is tracked in a frame of reference by a spatial determinator. The position of the images in the frame of reference is determined by calibrating the ultrasound imaging transducer to produce a vector position of the images with respect to a fixed point on the transducer. This vector position can then be added to the position and orientation of the fixed point of the transducer in the frame of reference determined by the spatial determinator. The position and orientation of a medical instrument used on the patient are also tracked in the frame of reference by spatial determinators. The position and orientation of the instrument is mapped onto the position and orientation of the images.

Abstract: The present invention provides a system and process for correlating points on a spatial body to corresponding points on a data-base body formed from pre-acquired images of the spatial body. The system and process involves matching the spatial points with the corresponding data-base points using relative positional information between the spatial points and the data-base points. Symmetric false matches are detected and discarded by fitting the spatial points and data-base points to a first and second closed body, respectively, and comparing the orientation of the spatial points and the data-base points projected onto the closed bodies.