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Multi-centre analysis of incidental findings on low-resolution CT attenuation correction images

Coward, J, Lawson, R, Kane, T, Elias, M, Howes, A, Birchall, J and Hogg, P 2014, 'Multi-centre analysis of incidental findings on low-resolution CT attenuation correction images' , The British Journal of Radiology, 87 (1042) , p. 20130701.

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OBJECTIVE: To review new incidental findings detected on low-resolution CT attenuation correction (CTAC) images acquired during single-photon emission CT (SPECT-CT) myocardial perfusion imaging (MPI) and to determine whether the CTAC images had diagnostic value and warrant reporting. METHODS: A multicentre study was performed in four UK nuclear medicine departments. CTAC images acquired as part of MPI performed using SPECT were evaluated to identify incidental findings. New findings considered to be clinically significant were evaluated further. Positive predictive value (PPV) was determined at the time of definitive diagnosis. RESULTS: Of 1819 patients studied, 497 (27.3%) had a positive CTAC finding. 51 (2.8%) patients had findings that were clinically significant at the time of the CTAC report and had not been previously diagnosed. Only four (0.2%) of these were potentially detrimental to patient outcome. CONCLUSION: One centre had a PPV of 0%, and the study suggests that these CTAC images should not be reported. Two centres with more modern equipment had low PPVs of 0% and 6%, respectively, and further research is suggested prior to drawing a conclusion. The centre with best quality CT had a PPV of 67%, and the study suggests that CTAC images from this equipment should be reported. ADVANCES IN KNOWLEDGE: This study is unique compared with previous studies that have reported only the potential to identify incidental findings on low-resolution CT images. This study both identifies and evaluates new clinically significant incidental findings, and it demonstrates that the benefit of reporting the CTAC images depends on the type of equipment used.

Item Type: Article
Schools: Schools > School of Health Sciences
Journal or Publication Title: The British Journal of Radiology
Publisher: British Institute of Radiology
ISSN: 0007-1285
Related URLs:
Funders: Non funded research
Depositing User: J Coward
Date Deposited: 08 Dec 2015 12:13
Last Modified: 08 Dec 2015 12:13

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