The present invention relates to the determination of the specific orientation of an object. In order to provide enhanced positioning information of an object to a user a medical imaging system and a method for operating of a medical imaging system are proposed wherein 2D image data (14) of an object is acquired (12) with an imaging system wherein the object is provided with at least three markers visible in the 2D image and wherein (16) the markers are detected in the 2D image and wherein the spatial positioning and rotation angle (20) of the object in relation to the system geometry is identified (18) on behalf of the markers and wherein an object-indicator (24) is displayed (22) indicating the spatial positioning and rotation angle of the object. Fig.2
