Dr. Danielle van der Waal Profile

Dr. Danielle van der Waal

at LRCB

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Proceedings Article | 16 March 2020 Presentation + Paper

Sequential reading effects in Dutch screening mammography

Craig Abbey, Michael Webster, Tanya Geertse, Danielle van der Waal, Eric Tetteroo, Ruud Pijnappel, Mireille J. Broeders, Ioannis Sechopoulos

Proceedings Volume 11316, 113160G (2020) https://doi.org/10.1117/12.2549320

KEYWORDS: Mammography, Radiology, Breast cancer

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Radiologists reading screening mammograms often do this in batches of images read sequentially. This work investigates ways that readers change over the course of a batch. We evaluate sequential reading effects in terms of suspicion scores and reading times from an ongoing study in the Netherlands.

A set of 3510 screening cases read as part of a national screening program by 10 qualified radiologist readers forms the basis for our study. The readers give a suspicion score (on a standalone device) in addition to their standard screening report. The score is time-stamped so that reading order and batch grouping can be assessed. Batches are defined as groups of cases with less than 10 minutes (600 s) between sequential readings. We use Kendall’s Tau, weighted by batch size, as a measure of association between batch position, and suspicion score or reading time. Randomization is used to get confidence intervals on the null hypothesis ( τ=0 ).

We find significant associations between batch position and both of the variables under investigation (suspicion scores and reading time). The associations are negative, suggesting that both suspicion and reading time are reduced at later points in a batch. These results are consistent with the hypothesis that readers are becoming visually adapted to the properties of the images as they progress through a batch of cases, affecting their perception and decisions about the images.

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