Review ArticleUK audit and analysis of quantitative parameters obtained from gamma camera renographyHOUSTON, A. S.*; WHALLEY, D. R.; SKRYPNIUK, J. V.; JARRITT, P. H.; FLEMING, J. S.; COSGRIFF, P. S.Author Information Institute of Physics and Engineering in Medicine (IPEM) Nuclear Medicine Software Working Party, York *Author to whom all correspondence should be addressed. e-mail: [email protected] Received 12 June 2000, in revised form 18 December 2000 and accepted 19 December 2000 Nuclear Medicine Communications: May 2001 - Volume 22 - Issue 5 - p 559-566 Buy Abstract The purpose of this study was to perform an audit of quantitative values obtained from gamma camera renography in the UK. Ten patient image sequences representing normal and pathological renal function were obtained from archived studies and distributed to hospitals in the UK. Hospitals were asked to measure five parameters: relative function, renogram time-to-peak (left and right), and whole kidney mean transit time (left and right). Details of methodology, software used and operator experience were requested. This allowed the influence of operational factors on variations in reported values to be examined. A total of 180 responses from 81 hospitals were received. Values reported for the parameters, together with other details supplied, were entered into Excel and SPSS for statistical analysis. Histograms representing the distribution of values were produced for each parameter. The largest variations were found for mean transit time and occasionally for time-to-peak. The effect of factors was assessed using non-parametric statistical tests applied independently to each renogram. For all the parameters, the hospital, UK region, supplier, computer and software version influenced variations in the reported values. Algorithm and site of background region were influencing factors for relative function, the background subtraction method influenced time-to-peak, and curve smoothing influenced mean transit time. © 2001 Lippincott Williams & Wilkins, Inc.