Patent · US Expired

Method for measuring the wall thickness of a tubular object

US6377654B1 · kind B1 · utility

26Cited by

5References

14Claims

0Family size

Assignee

Agfa-Gevaert NV · BE

Inventors

Peter Willems · Mortsel, BE
Bart Vaessen · Breda, NL
Piet Dewaele · Sint-Niklaas, BE
Yener Onel · Berlin, DE
Uwe Ewert · Berlin, DE

Key dates

Filing date	May 10, 2000
Grant date	Apr 23, 2002
Priority date	—
Expiry date	May 10, 2020

Classification

Technology area (CPC G)Physics
CPC primaryG01B15/025
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A digital representation of a radiation image of an at least partially tubular object is obtained. An attenuation profile over a tangentially imaged wall of the object is taken from the digital image on a straight line. The attenuation profile is reflected in the direction of the center of the object and the attenuation profile is reconstructed to form a relative density distribution by means of a transmission tomography-projection reconstruction method in which the measured reflected attenuation profile is used for all record annular positions.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.