Dual energy computerized tomography system
US5115394A · kind A · utility
51Cited by
7References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1983 |
| Grant date | May 19, 1992 |
| Priority date | — |
| Expiry date | Nov 25, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2211/421
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A dual energy method for CT scanning. Scanning is carried out at low and high energy levels, S.sub.2 and S.sub.1 respectively, each at a preselected dose level. Detected electronic signals (I.sub.2,I.sub.1) are digitized. A look up table is used to generate a pair of values from each pair of signals, one a photoelectric component and the other a Compton component. Each of these values are subjected to spatial filtering by a convolution filter function for each signal specially designed to increase the signal to noise ratio in the resultant combined image by exploiting the correlation in noise in the two values.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.