Abstract: Certain embodiments of the present invention provide a system and method for reducing image noise with the use of a minimal error spatiotemporal recursive filter. An input image is filtered both temporally and spatially, producing a temporal output and a spatial output. Both the temporal output and the spatial output are correlated with the input image to produce a temporal correlation output and a spatial correlation output. The temporal correlation output and the spatial correlation output are mixed to generate a selecting signal. The selecting signal directly or indirectly determines the composition of an output image. The selecting signal may select a portion of the temporal output and a portion of the spatial output to compose an output image. Alternatively, the selecting signal may select either the temporal output or the spatial output to compose an output image.

Abstract: Certain embodiments of the present invention provide a system, method and computer instructions for x-ray imaging. In an embodiment, such a system includes: an x-ray emission module configured to emit a stream of x-rays; a rotatable x-ray definition module configured to define the size and shape of the x-ray stream, wherein rotating the x-ray definition module rotates the shape of the x-ray stream; an x-ray detection module configured to detect the x-ray stream and create an image based on the detected x-rays; and an output module configured to output the image. In certain embodiments, the x-ray definition module may be configured to change the size of the x-ray stream when the x-ray definition module is rotated, for example. In certain embodiments, the x-ray detection module may be configured to rotate the image and/or change the size of the image before the image is output by the output module, for example.