Systems, devices, and methods for tracking and compensating for patient motion during a medical imaging scan

An optical marker apparatus for tracking motion of a subject during a medical imaging scan, the optical marker apparatus comprising:

• a substrate configured to be attached on a nose bridge of the subject of the medical imaging scan, the substrate comprising a flexible material configured to be shaped to substantially cover a curvature of the nose bridge of the subject to at least partially contact the nose bridge of the subject, the substrate comprising a longitudinal axis;
• a first mount connected to a surface of the substrate, wherein the first mount is located at a terminal end of the substrate, wherein the first mount comprises a rigid material;
• a second mount connected to the surface of the substrate, wherein the second mount is located at a central portion of the substrate, wherein the second mount comprises a rigid material, wherein the first mount and the second mount are located along the longitudinal axis of the substrate,
• wherein each of the first mount and the second mount comprises a top surface, wherein the top surface comprises an indicator;
• a first optical marker and a second optical marker, the first optical marker configured to be attached to the top surface of the first mount, and the second optical marker configured to be attached to the top surface of the second mount, wherein the indicator provides visual guidance to a user for attaching the first mount and the second mount in a correct orientation,
• wherein at least one or more of the first optical marker and the second optical marker are configured to be identified by one or more optical detectors for tracking motion of the subject during the medical imaging scan.

An optical marker apparatus for tracking motion of a subject during a medical imaging scan, the optical marker apparatus comprising:

• a substrate configured to be attached on a nose bridge of the subject of the medical imaging scan, the substrate comprising a flexible material configured to be shaped to substantially cover a curvature of the nose bridge of the subject to at least partially contact the nose bridge of the subject, the substrate comprising a longitudinal axis, wherein the substrate comprises:
• two terminal portion along a longitudinal axis of the substrate;
• and
• a central portion between the two terminal ends along the longitudinal axis of the substrate, wherein the central portion is configured to be more flexible than the two terminal ends;
• a first mount connected to a surface of the substrate, wherein the first mount is located at one of the two terminal ends of the substrate, wherein the first mount comprises a rigid material;
• a second mount connected to the surface of the substrate, wherein the second mount is located at the central portion of the substrate, wherein the second mount comprises a rigid material, wherein each of the first mount and the second mount comprises a top surface;
• a first optical marker and a second optical marker, the first optical marker configured to be attached to the top surface of the first mount, and the second optical marker configured to be attached to the top surface of the second mount,
• wherein at least one or more of the first optical marker and the second optical marker are configured to be identified by one or more optical detectors for tracking motion of the subject during the medical imaging scan.