Detector and localizer for low energy radiation emissions
US4801803A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1987 |
| Grant date | Jan 31, 1989 |
| Priority date | — |
| Expiry date | Mar 17, 2007 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/261
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A detector particularly suited for use in immuno-guided surgery capable of detecting very faint gamma emissions and thereby localizing cancerous tumor. The detector employs a hand manipular probe within which is contained a crystal such as cadmium telluride which is secured in a light tight compressively restrained environment employing compliant yet conductive components which also serve to exhibit varying accoustical impedance to impinging microphonic effects. A preamplifier is incorporated within the probe device itself which employs an integrator stage front end combining a field effect transistor and bipolar device with a very small feedback capacitance of less than one picofarad. A bootstrap technique is utilized to enhance the amplification of the bipolar amplification stage. Pulse related signals outputted from the device are normalized and compared to produce pulse data which are analyzed. In one mode of operation a siren effect is employed to guide the surgeon towards emission sources.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.