Patent Document ID: 8130384
Application ID: 12704979
Patent Status: 1

Claim One:
1. An apparatus for the representation of a geometrical figure on the surface of a patient's body that is situated on a support, comprising: at least one projection device ( 6 ), by which a given geometrical figure can be projected onto the three-dimensional surface of the patient's body ( 3 ), at least one control device ( 5 ) and at least one optical sensor device ( 20 ), by which the geometrical figure projected onto the surface of the patient's body ( 3 ) can be acquired and the acquired data can be supplied to the control device ( 5 ), wherein the control device ( 5 ) is realized to determine the three-dimensional coordinates of the geometrical figure projected onto the patient's body from the data acquired by the sensor device ( 20 ), and wherein the control device ( 5 ) is realized to compare the determined three-dimensional coordinates of the geometrical figure projected onto the patient's body with desired three-dimensional coordinates, further characterized in that the sensor device ( 20 ) is realized to produce a mapping of the geometrical figure several times per second and to supply the acquired data to the control device ( 5 ), and that the control device ( 5 ) is realized to determine the three-dimensional coordinates of the geometrical figure projected onto the patient's body ( 3 ) from the mapping data several times per second and to compare them with the desired coordinates also several times per second.