3-D Navigation for X-ray imaging system
First Claim
1. A method for generating and displaying an X-ray projection image of an instrument located within an object comprising the steps of:
- a) registering the spatial coordinates of an X-ray beam imaging system comprising an X-ray source and an X-ray sensitive screen with a location device;
b) recording the spatial location of said instrument using said location device with the X-ray beam switched off;
c) transforming the spatial coordinates of said instrument in the frame of reference of said location device into the coordinates of the corresponding X-ray projection image;
d) displaying said X-ray projection image of said instrument simultaneously with a previously stored X-ray projection image of said object.
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Abstract
A method for transforming the spatial coordinates of an instrument into its corresponding X-ray projection image is provided. The method is based on the registration of the coordinates system of an X-ray beam imaging system with a location device by simultaneously recording the spatial coordinates and the X-ray projection images of a calibration tool. The data are then used to establish a transform that will be used to convert the spatial coordinates of an instrument into its corresponding X-ray image projection with the X-ray beam turned off. Furthermore, the image of the instrument can be simultaneously displayed with that of an object to be operated on to enable an operator to guide the instrument within the object.
23 Citations
17 Claims
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1. A method for generating and displaying an X-ray projection image of an instrument located within an object comprising the steps of:
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a) registering the spatial coordinates of an X-ray beam imaging system comprising an X-ray source and an X-ray sensitive screen with a location device;
b) recording the spatial location of said instrument using said location device with the X-ray beam switched off;
c) transforming the spatial coordinates of said instrument in the frame of reference of said location device into the coordinates of the corresponding X-ray projection image;
d) displaying said X-ray projection image of said instrument simultaneously with a previously stored X-ray projection image of said object. - View Dependent Claims (2, 3, 4, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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- 5. The method of anyone of claim 5 wherein said X-ray projection image of said object is obtained prior, during or after the registration of the coordinates of the X-ray beam imaging system and stored in a computer to be subsequently retrieved.
Specification