Interrelated point acquisition for navigated surgery

A computer-implemented medical method for acquiring the position of points for navigated surgery, the method comprising executing, on a processor of a computer, the steps of:

• acquiring, at the processor and on the basis of detecting a first tracked device, first point position data for each of at least two points, wherein the first point position data comprise point position information describing a three-dimensional position of the point within a first co-ordinate system assigned to the first tracked device;
• acquiring, at the processor, first co-ordinate transformation data for each of at least two points, wherein the first co-ordinate transformation data comprise co-ordinate transformation information describing a transformation of the three-dimensional position of the point from the first co-ordinate system to a second co-ordinate system;
• acquiring, at the processor, second co-ordinate transformation data for each of at least two points, wherein the second co-ordinate transformation data comprise co-ordinate transformation information describing a transformation of the three-dimensional position of the point from the second co-ordinate system to a third co-ordinate system assigned to a second tracked device;
• and
• determining, by the processor and on the basis of the first and second co-ordinate transformation data, second point position data for each of at least two points, wherein the second point position data comprise point position information describing the three-dimensional position of the point within the third co-ordinate system,
• wherein the second point position data of at least one of the at least two points are determined on the basis of the second co-ordinate transformation data of at least one other of the at least two points.

A non-transitory computer-readable program storage-medium storing a computer program which, when executed on a processor of a computer or loaded into the memory of a computer, causes the computer to perform a computer-implemented medical method for acquiring the position of points for navigated surgery, the method comprising the following steps:

• acquiring, at the processor and on the basis of detecting a first tracked device, first point position data for each of at least two points, wherein the first point position data comprise point position information describing a three-dimensional position of the point within a first co-ordinate system assigned to the first tracked device;
• acquiring, at the processor, first co-ordinate transformation data for each of at least two points, wherein the first co-ordinate transformation data comprise co-ordinate transformation information describing a transformation of the three-dimensional position of the point from the first co-ordinate system to a second co-ordinate system;
• acquiring, at the processor, second co-ordinate transformation data for each of at least two points, wherein the second co-ordinate transformation data comprise co-ordinate transformation information describing a transformation of the three-dimensional position of the point from the second co-ordinate system to a third co-ordinate system assigned to a second tracked device;
• and
• determining, by the processor and on the basis of the first and second co-ordinate transformation data, second point position data for each of at least two points, wherein the second point position data comprise point position information describing the three-dimensional position of the point within the third co-ordinate system,
• wherein the second point position data of at least one of the at least two points are determined on the basis of the second co-ordinate transformation data of at least one other of the at least two points.