Article In: orcid, cienciavitae

The determination of the focal spot size of an X-ray tube from the radiation beam profile

Radiation Measurements

Oliveira, A.D.; Fartaria, M.J.; Alves, J.G. — 2015 — Elsevier

Key information

Authors:

Oliveira, A.D. (Augusto Manuel Dias de Oliveira); Fartaria, M.J.; Cardoso, J.; Santos, L.M.; Oliveira, C.; Pereira, M.F.; Alves, J.G. (João Henrique Garcia Alves)

Published in

November 2015

Abstract

The aim of this work is to show that the focal spot size of a given X-ray tube can be determined from the profile of the radiation beam without the use of devices specifically designed for that task. The approach presented relies on a simple model for the radiation beam profile and on an analytical function used to fit the beam profile data. The basics of the profile function are outlined and the relationship between the fitting and the profile parameters are deduced. The relationship of the proposed method with the edge spread function and line spread function concepts is discussed. The focal spot size of an X-ray tube used at the Laboratory for Metrology of Ionizing Radiation (LMRI) of IST was determined using the proposed method. In the analysis of the experimental results, the heel-effect was also evaluated.

Publication details

Authors in the community:

Publication version

AO - Author's Original

Publisher

Elsevier

Link to the publisher's version

https://www.sciencedirect.com/journal/radiation-measurements

Title of the publication container

Radiation Measurements

First page or article number

145

Volume

82

ISSN

1350-4487

DOI

10.1016/j.radmeas.2015.09.010

WoS (Web of Science)

366079300021

Fields of Science and Technology (FOS)

other-engineering-and-technologies - Other engineering and technologies

Keywords

  • X–ray tube
  • Focal spot size
  • Beam profile

Publication language (ISO code)

eng - English

Alternative identifier (URI)

http://dx.doi.org/10.1016/j.radmeas.2015.09.010

Rights type:

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