X-ray fluoroscopic system
US7796724B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 27, 2007 |
| Grant date | Sep 14, 2010 |
| Priority date | — |
| Expiry date | Nov 27, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2223/30
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An X-ray fluoroscopic system which is capable of highly accurately performing tilting tracking or rotational tracking by a simple operation in an observation work without inputting a distance from the surface of a table and an observed point of an object of fluoroscopy and without performing a calibration operation for obtaining the distance in advance. The X-ray fluoroscopic system having a tracking function of obtaining a moving amount of the table, which is necessary for performing tilting or rotational tracking, and moving the table, based on an arithmetic operation using a distance h obtained by totalizing a distance d from the surface of the table to an observed point V, and a distance z from the surface of the table to an X-ray focal point 1a, a defined value or arbitrary input value is used as an initial value of the distance h, and a shift amount of the observed point V occurred from tracking is used to update the distance h by specifying the observed point V on a screen after tracking, thereby tilt (rotation) tracking accuracy is gradually improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.