Optical pointer for radiographic apparatus
US4132900A · kind A · utility
11Cited by
3References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 12, 1977 |
| Grant date | Jan 2, 1979 |
| Priority date | — |
| Expiry date | May 12, 1997 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61N2005/1056
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A therapeutic radiographic apparatus includes a source of a pencil-like beam of penetrating radiation which requires to be positioned relative to a patient's body so that the radiation passes, at all times during therapy, through an anomaly, such as a tumor, in the patient's body. It is difficult to maintain coincidence of the beam with the anomaly, and this invention provides means for indicating optically a point of contact of the beam with the patient's body. The point of contact may, for example, be the point of emergence of the beam from the body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.