Image display apparatus for radiation diagnosis
US5161178A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1990 |
| Grant date | Nov 3, 1992 |
| Priority date | — |
| Expiry date | Oct 26, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05G1/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Image data of a plurality of frames obtained upon irradiating a radiation onto an object to be examined, the object being injected with a catheter in a blood vessel thereof, are converted into digital image of a plurality of frames by an A/D. Digital image data of a first predetermined frame and digital image data of a second predetermined frame prior to the first predetermined frame, which are converted by the A/D, are alternately stored in first and second memories. A difference between the digital image data of the first predetermined frame output from the A/D and the digital image data of the second predetermined frame output from the one of first and second memories is calculated by a subtractor to obtain subtraction image data denoting a motion of the catheter. This subtraction image data is multiplied by a multiplier with a predetermined weighting factor input by a console to emphasize the subtraction image data, thereby displaying subtraction image data emphasized in correspondence with the catheter motion on a TV monitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.