Intraorbital foreign body detection and localisation by radiographers: a preliminary JAFROC observer performance study
Lockwood, P., Pittock, L., Lockwood, C., Jeffery, C. and Piper, K. 2015. Intraorbital foreign body detection and localisation by radiographers: a preliminary JAFROC observer performance study. Radiography. 2015, pp. 1-5.
|Authors||Lockwood, P., Pittock, L., Lockwood, C., Jeffery, C. and Piper, K.|
Introduction - The purpose of this study was to run a preliminary investigation to establish if a short course of learning would increase radiographers’ performance in intraorbital foreign body (IOFB) detection and localisation on pre-magnetic resonance imaging (MRI) orbital computed radiographs (CR).
Method - A multi-reader multi-case (MRMC) human observer study was performed. Fifteen radiographers from 5 hospitals participated. Each radiographer reviewed a pre- and post-training image bank and was instructed to identify the presence or absence of IOFBs, indicating the lesion location on each case whilst scoring the detection using a confidence index on a 5-point scale, for 30 orbital radiographs. The results were analysed using a Jackknife free-response receiver operating characteristic (JAFROC2 equal weighted) methodology.
Results -The performance of the radiographers demonstrated a statistically significant difference after a short period of training in the detection of IOFBs on orbital radiographs (F (1,14)= 12.99, df = 14.0, p = 0.0029). The JAFROC2 analysis averaged figure of merit (FOM) for the radiographers was 0.818 (95% CI 0.769, 0.867) pre-training and 0.920 (95% CI 0.891, 0.950) post-training.
Conclusion - These results suggest that with a short programme of learning in image interpretation for IOFBs in orbital radiographs, radiographers should be able to achieve a high level of accuracy in the identification and localisation of IOFBs prior to MRI examination.
|Journal citation||2015, pp. 1-5|
|Digital Object Identifier (DOI)||doi:10.1016/j.radi.2015.06.005|
|06 Jul 2015|
|Publication process dates|
|Deposited||23 Sep 2015|
|Accepted||06 Jul 2015|
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