METHOD AND SYSTEM OF DETERMINING PROBE POSITION IN SURGICAL SITE

One method to determine a position of a probe(112) in a surgical site with a plurality of reference structures may include receiving a three-dimensional image(300) of the surgical site generated before the probe(112) enters the surgical site and receiving a first two-dimensional image(206) generated by the probe(112) from a position within the surgical site. The three-dimensional image(300) is associated with a first coordinate system, and the first two-dimensional image(206) is associated with a second coordinate system. The method also includes acquiring registration to the plurality of reference structures based on the first two-dimensional image(206) to obtain a permissible set of probe pose parameters, extracting a second two-dimensional image(408) based on the permissible set of probe pose parameters from the three-dimensional image(300), and computing a correlation between the first two-dimensional image(206) and the extracted second two-dimensional image(408) to map the position of the probe represented by the second coordinate system to a position represented by the first coordinate system with respect to the three-dimensional image(300).