Scanning a radiation source with a count rate output derived with a dynamic window analysis
US6144876A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 1998 |
| Grant date | Nov 7, 2000 |
| Priority date | — |
| Expiry date | Oct 23, 2018 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B6/469
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Count rate outputs of a probe-based radiation detection system are stabilized through the utilization of a dynamic window-based count analysis. Circular memory is utilized to record a sequence of segment count values. These values then are accessed and updated with respect to short scan intervals. The memory segments then are employed to develop a count sum over a count collection interval. That count sum is employed with algorithms adjusting the upper and lower edges of the dynamic window. A reported mean value, computed from the window upper edge or window lower edge, is utilized for creating a variable pitch output or for driving a bar graph. Background count and target count intervals are adjusted utilizing a data point predictive technique in combination with upper and lower time bounds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.