Moving X-ray mask with spiral window
US4541107A · kind A · utility
11Cited by
1References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 4, 1984 |
| Grant date | Sep 10, 1985 |
| Priority date | — |
| Expiry date | Jun 4, 2004 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/027
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An X-ray system includes an X-ray source directing X-radiation on a first path through a subject to an X-radiation receptor which responds to X-rays to direct light radiation on a secondary path to a light image plane. In either path or both paths is a rotating radiation-opaque mask having one or more spiral radio-transparent windows which sweep through the path as the mask rotates. Each spiral window may be formed by the overlap of coaxial spiral windows in superimposed masks which are relatively adjustable in phase to vary the window width.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.