System for detecting global patient movement during imaging procedures

A system for detecting a patient's global movement during imaging procedures, the system comprising:

• at least one camera configured to provide a stream of images of a part of a patient's exterior and body contour;
• a fiducial element having an adhesive layer configured to be attached to the part of a patient's exterior, the fiducial element being configured to conform to said part of the patient's exterior when attached by the adhesive to said part of the patient's exterior to follow a part contour of said part of the patient's exterior, wherein the fiducial element is detectable in the stream of images, wherein the fiducial element has an in-plane stiffness larger than an in-plane stiffness of said part of the patient's exterior, and wherein the fiducial element and said part of the patient's exterior are provided with equal outer in-plane dimensions;
• an image processor configured to detect a displacement of the fiducial element based on consecutive images comprised in the stream of images, and configured to generate an output signal indicative of said displacement;
• and
• a device configured to generate and render an X ray image of said part of a patient's interior,
• wherein the in-plane stiffness and the outer in-plane dimensions of the fiducial element are such that local movements of said part of the patient's exterior relative to a skeleton of the patient along a direction parallel to a plane of the fiducial element are prevented,
• wherein the outer in-plane dimension of the fiducial element exceeds 1 cm by 1 cm, and
• wherein the ratio of the in-plane stiffness of the fiducial element to the in-plane stiffness of said part of the patient's exterior is 100 to 1 to reduce movement of the patient's exterior along the direction parallel to the plane of the fiducial element.

A system for detecting a patient's global movement during imaging procedures, the system comprising:

• at least one camera configured to provide a stream of images of a part of a patient's exterior;
• at least one fiducial element mountable on the part of the patient's exterior, wherein the fiducial element is detectable in the stream of images, wherein the fiducial element has an in-plane stiffness larger than an in-plane stiffness of said part of the patient's exterior, and wherein the fiducial element and the part of the patient's exterior are provided with equal outer in-plane dimensions;
• and
• an image processor configured to detect a displacement of the fiducial element based on consecutive images comprised in the stream of images, and configured to generate an output signal indicative of said displacement,
• wherein a ratio of the in-plane stiffness of the fiducial element to the in-plane stiffness of said part of the patient's exterior exceeds 10 to 1, and
• wherein the outer in-plane dimension of the fiducial element exceeds 10 cm by 10 cm to reduce movement of the patient's exterior along the direction parallel to the plane of the fiducial element.