Marking arrangement, medical device, and system for reconstructing a planned trajectory

A system for reconstructing a planned trajectory of a medical device, the system comprising:

• a marking arrangement comprising:
• a plurality of markers arranged in series along a source trajectory, wherein each marker of the plurality of markers are aligned with the source trajectory. are made of a first material, and comprise a coating, wherein the coating is made of a second material disposed on a surface of each marker of the plurality of markers, wherein a thickness of the coating is smaller than 1 micrometer, and wherein an interdistance between each maker of the plurality of markers is smaller than 3 millimeters;
• a detection module, arranged for detecting the marking arrangement;
• and
• a treatment calculation module, arranged for determining trajectories and dwell times, wherein the treatment calculation module comprises a controller and a non-transitory computer readable memory storing instructions thereon that, when executed by the controller, cause the controller to:
• determine a trajectory of the medical device based on the detected marking arrangement;
• compare the determined trajectory of the medical device with the planned trajectory;
• and
• adjust a dwell time of the determined trajectory based on comparing the determined trajectory of the medical device with the planned trajectory.