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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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.
|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|
|Funders:||Non funded research|
|Depositing User:||P Hogg|
|Date Deposited:||08 Oct 2013 06:23|
|Last Modified:||30 Nov 2015 23:43|
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