| 主权项 |
1. An extra-oral dental x-ray radiation imaging device, comprising:
an x-ray source adapted for generating x-rays for exposure of such x-rays to an object to be imaged; an x-ray imaging device with an active area of irregular shape adapted for producing multiple frames during at least part of the exposure, said x-ray imaging device comprising an active area having a rectangular shape with length y and a width x, with the width x having at least two different values (x,x′) for corresponding ranges along the length y; at least one rotational axis around which at least one of the x-ray source and imaging device rotates along a spline, the axis being located between the x-ray source focal point and the x-ray imaging device; and a processor configured to process the frames of a single exposure to compose selectively at least two of a group of elements, the elements comprising: (a) at least part of a panoramic image, (b) at least part of a cephalometric image, (c) a transverse slice to a local part of a dental panoramic layer image, and (d) a 3-D reconstruction of a volume of interest, wherein: said x-ray imaging device is a single imaging sensor comprised of a plurality of individual pixel detectors combined in an array defining an active area responsive to x-rays, each detector composed of pixels, an average physical gap is defined between each set of adjacent edges of closest adjacent ones of said individual detectors, and each of said average physical gaps of all of said plural individual detectors is up to 400% of a pixel size of the pixels of the image produced by said radiation imaging as displayed for viewing. |
