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Fact or fiction: An analysis of the 10 kVp ‘rule’ in computed radiography

Allen, E, Hogg, P, Ma, KM and Szczepura, K 2013, 'Fact or fiction: An analysis of the 10 kVp ‘rule’ in computed radiography' , Radiography, 19 (3) , pp. 223-227.

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Abstract

Purpose: To determine whether increasing the tube voltage by 10 kVp whilst reducing the tube current by 50% (10 kVp ‘rule’) produces similar perceptual image quality. Method: 391 matched pairs of anthropomorphic chest phantom X-ray images were produced on a computed radiography (CR) system. Five experienced clinicians graded the images using a 2 alternative forced choice comparison method. Based on acquisition parameters and dose area product (DAP) readings, effective dose (E) was calculated for all images using dose calculation software. Results: Perceptual image quality scores prior to and following application of the 10 kVp ‘rule’ were found have no statistical difference (p > 0.1), indicating that the increase in kVp and reduction in mAs had limited impact on the perceptual image quality. In all cases E reduced, with an average 36% (s.d 7%) after the ‘rule’ had been applied (p < 0.001). Conclusion: Results demonstrate that application of the 10 kVp ‘rule’ significantly reduces E, with no significant reduction in perceptual image quality. Further research should be conducted for a range of examinations using CR and digital radiography (DR) systems.

Item Type: Article
Themes: Health and Wellbeing
Schools: Schools > School of Health Sciences > Centre for Health Sciences Research
Schools > School of Health Sciences
Journal or Publication Title: Radiography
Publisher: Elsevier
Refereed: Yes
ISSN: 1078-8174
Related URLs:
Funders: Non funded research
Depositing User: P Hogg
Date Deposited: 08 Oct 2013 06:23
Last Modified: 30 Nov 2015 23:43
URI: http://usir.salford.ac.uk/id/eprint/29521

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