Patent ID: 9370317
Filing Date: 2016-06-21
CPC Classification: A61B

Claim Text:
1. A computer-implemented method for determining a mid-sagittal plane position of a mid-sagittal plane of a pelvis by a computer comprising a non-transient memory, wherein the mid-sagittal plane is a plane which can be described by anatomical landmarks of the pelvis, the method comprising: providing absolute auxiliary point data to the computer, wherein the absolute auxiliary point data relates to an auxiliary point position of at least one actual auxiliary point of a plurality of actual auxiliary points of the pelvis relative to a marker device, the marker device comprising one or more markers arranged in a predetermined spatial relationship representative of the marker device wherein data representative of the spatial relationship is stored in the memory, the plurality of actual auxiliary points being outside the mid-sagittal plane and representing first anatomical landmarks of the pelvis; providing relative point data to the computer, wherein the relative point data constrain possible positions of the mid-sagittal plane relative to the at least one actual auxiliary point; providing absolute main point data to the computer, wherein the absolute main point data relate to an absolute main point position of one or two actual main points of the pelvis relative to the marker device, said one or two actual main points lying in the mid-sagittal plane and representing a second anatomical landmark of the pelvis, the absolute auxiliary point data and the absolute main point data having been generated by detection, the detection comprising a step of contacting the pelvis; using a computer including a processor and memory to perform at least one of: calculating by the processor the mid-sagittal plane position relative to the marker device, wherein the calculation uses the relative point data, the auxiliary point data, and the provided main point data as well as at least one of the calculated at least one virtual main point position and the calculated at least one virtual auxiliary point position; generating an indication signal for providing information to a user based on the calculated mid-sagittal plane and the data representative of the spatial relationship; and/or using the position of the mid-sagittal plane for determining a coordinate system with respect to which a position of an object can be defined.