Fiducials for x-ray device

Abstract

Provided herein are methods, apparatuses, computer program products, and systems for fiducials in X-ray devices. One device can include an X-ray source configured to emit X-rays; a scintillator configured to absorb, on a first side, the X-rays after interaction with a scan object, the scintillator being configured to emit light from a second side of the scintillator in response to absorption of the X-rays; a camera configured to receive the light from the second side of the scintillator; and at least one optical fiducial located on the second side of the scintillator and within a field-of-view of the camera, wherein each of the at least one optical fiducial includes a sharp feature, which causes an abrupt step change of intensity in reflected light, and an image captured by the camera includes data representing the sharp feature that is processable to characterize at least one optical parameter of the camera.

Dependencies are inferred from the claim text.