Method and apparatus producing plural images of different contrast range by X-ray scanning
US4149076A · kind A · utility
Inventor
Key dates
| Filing date | Jun 24, 1977 |
| Grant date | Apr 10, 1979 |
| Priority date | — |
| Expiry date | Jun 24, 1997 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/66
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A plurality of radiographic images of a subject are obtained simultaneously by situating the subject between a scanning X-ray source and an X-ray detector. The source has an electron beam which is swept through a raster pattern on a broad target to produce a moving X-ray origin point while the detector has an effective radiation-sensitive area which is very small in relation to the raster pattern. The X-axis and Y-axis beam deflection signals which control the X-ray source are also transmitted to both sets of raster signal terminals of a dual-image oscilloscope of the form having two deflectable electron beams for producing two separate images at a display screen. Both intensity signal terminals of the oscilloscope receive processed X-ray count signals from the detector through separate signal channels so that a pair of radiographic images of the scanned region of the subject are generated at the display screen. Separate signal processing circuits in each channel may be adjusted to have different gain factors and to establish different base levels and peak levels for the intensity signals enabling each radiographic image to emphasize a different aspect of the scanned region of the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.