Comparison of Radiographer/Radiologist Double Film Reading with Single Reading in Breast Cancer Screening

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Abstract
Objectives—: To assess the efficacy of dual film reading in screening mammography with a suitably trained radiographer as the second reader and to determine a suitable decision model for radiographer/radiologist double reading. Setting—: Three breast screening centres in South Thames (West) region. Methods—: Seven radiographers with prior film reading training double read 17 202 screening mammograms with a radiologist. Screening performance of radiographers and radiologists was assessed taking into account interval cancers. The efficacy of radiographer/radiologist double reading was assessed in terms of changes in sensitivity and specificity compared with radiologist single reading. Results—: Radiographers yielded equivalent sensitivity but lower specificity than radiologist film readers. The effect of double reading between radiographer/radiologist pairs was an increase in sensitivity of 6.4%, which was achieved at the cost of a 0.6% decrease in specificity. This was reached by a decision system involving radiologists' review of radiographer queries and recall classifications. If all radiographer queries were recalled a large increase in sensitivity would be counterbalanced by an equally large decrease in specificity. Conclusions—: Radiographer/radiologist double reading resulted in similar increases in sensitivity as those previously reported in radiologist double reading studies. Radiologist review of radiographer reported abnormalities is a suitable means by which to limit excess recall.