Enhanced resolution imaging and measurement systems
US5572448A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 18, 1993 |
| Grant date | Nov 5, 1996 |
| Priority date | — |
| Expiry date | Nov 18, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01B7/345
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A computed axial tomography (CAT) system including a ring assembly surrounding a location at which the object is placed; an X-ray source mounted on the ring assembly; an array of X-ray sensors arranged on the periphery of the ring assembly for measuring X-ray intensity from the object; a drive motor for rotating the ring assembly about the object; measurement control circuitry controlling the drive motor, receiving data from the array of X-ray sensors and generating a plurality of vectors of X-ray data therefrom, said plurality of vectors being represented by a measured column tensor; a memory for storing the measured column tensor; and a computer programmed to left multiply the measured column tensor stored in said memory by a reconstruction tensor T to obtain an estimate of a desired measurement column tensor, wherein said reconstruction tensor T is equal to R.sub.dm R.sub.mm.sup.-1, R.sub.dm being a cross-covariance tensor computed for d, a desired measurement column tensor, and m, the measured column tensor, and R.sub.mm being an auto-covariance tensor computed for m, the measured column tensor, and wherein the estimate of a desired measurement column tensor represents an estim…
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