| 摘要 |
The present invention relates to a navigation system for carrying out and assisting surgical operations, wherein said system uses an image databank for nuclear spin and/or computer tomography data prepared for pre-operative purposes. The system includes means for extracting anatomic structures from sets of raw data previously obtained from pre-operative snapshots and for preparing said structures in the form of 3D data sets that can be visualised. The system also includes means for generating a continuous magnetic field defined within the navigation environment as well as a pointer navigation instrument with an integral magnetic field detector, wherein the magnetic field detector and the continuous field emitter represent the tracking device. The system also includes a menu-guided control, wherein movements of the pointer navigation instrument outside the surgical site but within the navigation environment, i.e. within the control field, activate or deactivate the proposed menus or control activities. The present invention also relates to a special marking device or fiducial represented during the generation of image data and used for detecting the position of a volunteer as well as for assigning co-ordinates during surgical operations. This invention further relates to a pointer for the tracking device of the navigation system, comprising a detector specially mounted in a housing connected with a contact tip. |
