X-ray imaging variable resolution
A scanning x-ray imaging system produces an image of the transmissivity of objects by producing a relative motion of the object generally perpendicular to the triangular planes joining an x-ray point source and M x-ray line detectors, where M is equal to or greater than 1; these x-rays pass through a scanning slit assembly. The scanning slit assembly generally includes a plane of x-ray opaque material having N sets of line slits, where N is equal to or greater than 2, each set containing M identical line slits. The scanning slit assembly, in addition, includes a rotating x-ray opaque material containing N uniquely different sets of radial slits, each set containing identical radial slits. Each of the N sets of radial slits is uniquely paired with each of the N sets of line slits. During any scan of an object, M detectors, M line slits and one of the N sets of radial slits are used. The scanning x-ray imaging system provides N selections in image resolution of the scanned object. The selectivity provides radiographic images with different contrast resolution and/or spatial resolution.
- Assignee:
- American Science and Engineering Inc
- Patent Number(s):
- US 4242583
- OSTI ID:
- 6793601
- Country of Publication:
- United States
- Language:
- English
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