Head band for frameless stereotactic registration
First Claim
1. A method for localizing positions in a patient'"'"'s anatomy, comprising the steps of:
- providing a localizer system including a band, image reference markers mounted to the band and detectable as image scan data, and dynamic reference markers mounted to the band and having a predetermined reference pattern detectable by a detection apparatus;
securing the band of the localizer system with respect to a body part of the patient to mount the localizer system to the patient;
image scanning the body part to obtain image scan data of the body part and the image reference markers and referenced in an image scan coordinate system;
referencing physical locations of the image reference markers and the dynamic reference markers in a stereotactic coordinate system associated with an external treatment apparatus;
mapping the image scan coordinate system into the stereotactic coordinate system utilizing a computer to define a coordinate transformation between the image scan coordinate system and the stereotactic coordinate system;
detecting movement of the dynamic reference markers with the detection apparatus, the detection apparatus having a known position with respect to the stereotactic coordinate system to detect changes in position of the body part with respect to the stereotactic coordinate system; and
modifying the coordinate transformation based upon detected changes in position of the dynamic reference markers to thereby account for movement of the body part to correct mapping between the image scan and stereotactic coordinate system.
4 Assignments
0 Petitions
Accused Products
Abstract
A skin-based band is fixed to a patient'"'"'s skin in a repeatable position and includes reference markers which, attached to the skin band, can be visualized in tomographic image scanning. The reference markers appear as reference marker images in the image scan data from the image scan and correspond to coordinate positions in the image scan coordinate system. The reference markers also provide corresponding reference marker positions in the physical space of the patient'"'"'s anatomy, which may correspond to a stereotactic coordinate system associated with a digitized navigator or frameless stereotactic reference system near the patient. The band can also be placed on the patient again at the time of surgical intervention, and the reference markers can be touched or referenced by the surgical navigator in the stereotactic coordinate system. A computer system assimilates the image scan data and calibration data and enables a mapping from the image scan coordinate system to the stereotactic coordinate system so that surgical instruments can be tracked by a surgical navigator so that their position can be referenced to the image scan data.
328 Citations
8 Claims
-
1. A method for localizing positions in a patient'"'"'s anatomy, comprising the steps of:
-
providing a localizer system including a band, image reference markers mounted to the band and detectable as image scan data, and dynamic reference markers mounted to the band and having a predetermined reference pattern detectable by a detection apparatus;
securing the band of the localizer system with respect to a body part of the patient to mount the localizer system to the patient;
image scanning the body part to obtain image scan data of the body part and the image reference markers and referenced in an image scan coordinate system;
referencing physical locations of the image reference markers and the dynamic reference markers in a stereotactic coordinate system associated with an external treatment apparatus;
mapping the image scan coordinate system into the stereotactic coordinate system utilizing a computer to define a coordinate transformation between the image scan coordinate system and the stereotactic coordinate system;
detecting movement of the dynamic reference markers with the detection apparatus, the detection apparatus having a known position with respect to the stereotactic coordinate system to detect changes in position of the body part with respect to the stereotactic coordinate system; and
modifying the coordinate transformation based upon detected changes in position of the dynamic reference markers to thereby account for movement of the body part to correct mapping between the image scan and stereotactic coordinate system. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
-
Specification