Effects of off-focal radiation on dimensional measurements in industrial cone-beam micro-focus X-ray computed tomography systems
Effects of off-focal radiation on dimensional measurements in industrial cone-beam micro-focus X-ray computed tomography systems
A study of the secondary source phenomenon due to the presence of off focal radiation in industrial micro-focus cone- beam X-ray computed tomography systems and its influence on dimensional measurement is presented. Although off- focal radiation production within X-ray tubes is predicted theoretically, no literature discussing its properties and its effects on measurements in industrial XCT systems was identified prior to this research. The study comprised: evaluation of the geometrical properties of the secondary focal spot through 2D image analysis of scanned objects, verification of these properties using computer simulation techniques and evaluation of the effects of the secondary source on dimensional measurements using real scans and simulated 3D models of spheres. In addition, ways to minimise the effects of off-focal radiation are discussed, procedures for analysing the properties of the secondary source of radiation are proposed.
Sun, Wenjuan
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Flay, Nadia
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Brown, Stephen
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Blumensath, Thomas
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Su, Rong
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Sun, Wenjuan
86c095ee-f1b5-4fb5-ba2c-b65ab5dab27d
Flay, Nadia
bc8fbd1c-1a81-42b0-a629-218cf2c83a27
Brown, Stephen
c2b7f59f-a1b0-41fe-a9eb-e61768b837a0
Blumensath, Thomas
470d9055-0373-457e-bf80-4389f8ec4ead
Su, Rong
a7104b4a-2387-41ba-804a-3db91bf8a4d3
Sun, Wenjuan, Flay, Nadia, Brown, Stephen, Blumensath, Thomas and Su, Rong
(2020)
Effects of off-focal radiation on dimensional measurements in industrial cone-beam micro-focus X-ray computed tomography systems.
Precision Engineering.
(Submitted)
Abstract
A study of the secondary source phenomenon due to the presence of off focal radiation in industrial micro-focus cone- beam X-ray computed tomography systems and its influence on dimensional measurement is presented. Although off- focal radiation production within X-ray tubes is predicted theoretically, no literature discussing its properties and its effects on measurements in industrial XCT systems was identified prior to this research. The study comprised: evaluation of the geometrical properties of the secondary focal spot through 2D image analysis of scanned objects, verification of these properties using computer simulation techniques and evaluation of the effects of the secondary source on dimensional measurements using real scans and simulated 3D models of spheres. In addition, ways to minimise the effects of off-focal radiation are discussed, procedures for analysing the properties of the secondary source of radiation are proposed.
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Submitted date: 21 April 2020
Identifiers
Local EPrints ID: 440669
URI: http://eprints.soton.ac.uk/id/eprint/440669
ISSN: 0141-6359
PURE UUID: 19b0913d-eec1-4753-be5d-8bf747ef3766
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Date deposited: 13 May 2020 16:33
Last modified: 17 Mar 2024 03:19
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Contributors
Author:
Wenjuan Sun
Author:
Nadia Flay
Author:
Stephen Brown
Author:
Rong Su
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