Evaluation of X-ray table mattresses for radiation attenuation and impact on image quality

Alresheedi, N, Walton, LA ORCID: https://orcid.org/0000-0002-8651-7443, Hogg, P ORCID: https://orcid.org/0000-0002-6506-0827, Webb, JS and Tootell, AK ORCID: https://orcid.org/0000-0002-8567-8659 2020, 'Evaluation of X-ray table mattresses for radiation attenuation and impact on image quality' , Radiography . (In Press)

[img] PDF - Accepted Version
Restricted to Repository staff only

Download (551kB) | Request a copy

Abstract

Introduction Mattresses in the radiology department tend to be an overlooked aspect of imaging equipment. This paper evaluates the radiation attenuation characteristics of mattresses and the effect they have on image quality.
Method Thirteen mattresses (from new to 20 years of age) were evaluated. Incident air kerma (IAK) was measured in two conditions, with and without mattress over a range of exposure factors using a digital dosimeter. The percentage change was calculated and applied to the set mAs to illustrate the “effective mAs” delivered to an image receptor. Image quality was assessed by calculating the inverse image quality factor (IQFinv) using a commercially available phantom (CDRAD) for the same exposure factors. The correlation of age and attenuation and image quality was calculated.
Results Measured IAK and image quality was affected by the addition of a mattress. IAK decreased due to attenuation and IQFinv indicated worse image quality. IAK correlated negatively with mattress age indicating that older mattresses have higher attenuation properties. The clinical impact for radiation increase was insignificant as it resulted in an average of 0.05 change in mAs. There was no correlation between age and image quality.
Conclusion The results indicate that while the presence of a mattress does impact on transmitted radiation and the quality of the image, the clinical impact is insignificant. Attenuation correlates with age but with no clinical significance. There is no correlation between age and image quality. Implications for practice Quality control tests for attenuation and impact on image quality are not required in clinical practice. The method could be used by manufacturers to test new materials and mattresses and could provide users with specifications of new products.

Item Type: Article
Schools: Schools > School of Health and Society > Centre for Health Sciences Research
Journal or Publication Title: Radiography
Publisher: Elsevier
ISSN: 1078-8174
Depositing User: AK Tootell
Date Deposited: 02 Nov 2020 14:00
Last Modified: 02 Nov 2020 14:00
URI: http://usir.salford.ac.uk/id/eprint/58667

Actions (login required)

Edit record (repository staff only) Edit record (repository staff only)

Downloads

Downloads per month over past year