Diagnostic x-ray imaging system
US4135091A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 20, 1977 |
| Grant date | Jan 16, 1979 |
| Priority date | — |
| Expiry date | Jun 20, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/848
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A radiation imaging system employs a superheated, superconducting colloid detector subjected to an external magnetic field so that the colloid grains are maintained in a metastable superconducting state in the absence of radiation. Intersecting sets of select wires are imbedded in the detector that divide the detector into volumetric resolution elements. Grains in each resolution element that absorb photons emanating from an object "flip" to the normal conducting state. By applying coincident currents to the select wires defining each element, a local magnetic field is produced that opposes the external field so that all the "flipped" grains are reset to the superconducting state. This produces a flux change proportional to the number of photons incident on that element which is sensed and used to develop an x-ray image of the object.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.