A study investigating variability of left ventricular ejection fraction using manual and automatic processing modes in a single setting

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dc.contributor.author Bresser, Philippa
dc.contributor.author De Beer, Janeske
dc.contributor.author De Wet, Yolandi
dc.date.accessioned 2015-02-02T07:09:27Z
dc.date.available 2015-02-02T07:09:27Z
dc.date.issued 2015-02
dc.description.abstract PURPOSE : A planar multi-gated cardiac blood pool acquisition is a non-invasive technique commonly used to measure left ventricular ejection fraction (LVEF). It is essential that the calculation of LVEF be accurate, repeatable and reproducible for serial monitoring of patients. Different processing modes may be used in calculating the LVEF which require various degrees of manipulation. In addition, different operators with varying levels of experience may process the same data set. It is not known whether the inter-operator variability of LVEF values within a single nuclear medicine department has the potential to affect the calculated LVEF and in turn affect patient management. The aim of the study was to determine variability of LVEF values among operators with different levels of experience using two processing modes. METHODS : A descriptive cross-sectional study was carried out in a single setting. Four operators with varying levels of experience analysed 120 left anterior oblique projections using manual and automatic processing modes to calculate the LVEF. Inter- and intra-operator correlation was determined. RESULTS : Manual processing showed moderate to strong agreement (r1 = 0.653) between operators. Automatic processing indicated almost perfect (r1 = 0.812) inter-operator correlation. Intra-operator correlation demonstrated a trend of decreasing variability between processing modes with increasing levels of experience. CONCLUSION : Despite the overall inter-operator agreement, significant intra-operator variability was evident in results from operators with less experience. However, the discrepancies were such that the differences in LVEF would not play a role in patient management. It is recommended that automatic processing be used for determining LVEF to limit inter-operator variability. Additionally operator experience should be considered in the absence of standardised processing protocols when different processing modes are available in a single setting. en_ZA
dc.description.librarian hj2015 en_ZA
dc.description.uri http://www.elsevier.com/locate/radi en_ZA
dc.identifier.citation Bresser, P, De Beer, J & De Wet, Y 2015, 'A study investigating variability of left ventricular ejection fraction using manual and automatic processing modes in a single setting', Radiography, vol. 21, no. 1, pp. e41-e44. en_ZA
dc.identifier.issn 1078-8174 (print)
dc.identifier.issn 1532-2831 (online)
dc.identifier.other 10.1016/j.radi.2014.10.002
dc.identifier.uri http://hdl.handle.net/2263/43513
dc.language.iso en en_ZA
dc.publisher Elsevier en_ZA
dc.rights © 2014 The College of Radiographers. Published by Elsevier Ltd. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Radiography. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Radiography, vol. 21, no. 1, pp. e41-e44, 2015. doi :10.1016/j.radi.2014.10.002. en_ZA
dc.subject Equilibrium radionuclide angiography en_ZA
dc.subject Processing methods en_ZA
dc.subject Intra-observer variability en_ZA
dc.subject Left ventricular ejection fraction (LVEF) en_ZA
dc.title A study investigating variability of left ventricular ejection fraction using manual and automatic processing modes in a single setting en_ZA
dc.type Postprint Article en_ZA


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