Artifact elimination in digital radiography
US6115451A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 1998 |
| Grant date | Sep 5, 2000 |
| Priority date | — |
| Expiry date | Dec 22, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/17
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
Described herein is a method of radiographic imaging providing low access time prior to the start of a user-requested X-ray exposure, while at the same time reducing or eliminating the imaging artifacts associated with short access times. The method includes the steps of exposing a radiographic detector for a time period t.sub.e ; reading the radiographic detector to obtain an exposure reading; reading the radiographic detector to obtain an offset reading, wherein the offset reading is obtained after a time period t.sub.w greater than t.sub.e ; and subtracting the offset reading from the exposure reading. Where the detector is subjected to readings lasting for periods t.sub.r prior to taking the exposure reading, detector readings lasting for t.sub.r are also taken during t.sub.w. After the final t.sub.r reading is taken during t.sub.w, the offset reading is then preferably taken after a period equal to t.sub.e. As a result, approximately the same detector sampling scheme is used both prior to and after the exposure reading (i.e., approximately the same operating conditions are imposed on the detector prior to the exposure reading and the offset reading), thereby providing more acc…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.