Mass detection on mammograms: influence of signal shape uncertainty on human and model observers.

Journal Article

We studied the influence of signal variability on human and model observers for detection tasks with realistic simulated masses superimposed on real patient mammographic backgrounds and synthesized mammographic backgrounds (clustered lumpy backgrounds, CLB). Results under the signal-known-exactly (SKE) paradigm were compared with signal-known-statistically (SKS) tasks for which the observers did not have prior knowledge of the shape or size of the signal. Human observers' performance did not vary significantly when benign masses were superimposed on real images or on CLB. Uncertainty and variability in signal shape did not degrade human performance significantly compared with the SKE task, while variability in signal size did. Implementation of appropriate internal noise components allowed the fit of model observers to human performance.

Full Text

Duke Authors

Cited Authors

  • Castella, C; Eckstein, MP; Abbey, CK; Kinkel, K; Verdun, FR; Saunders, RS; Samei, E; Bochud, FO

Published Date

  • February 2009

Published In

Volume / Issue

  • 26 / 2

Start / End Page

  • 425 - 436

PubMed ID

  • 19183697

International Standard Serial Number (ISSN)

  • 1084-7529

Language

  • eng

Conference Location

  • United States