Psychophysical Studies of Detection Errors in Chest Radiology

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Abstract
In 62 of 124 cases analyzed, there occurred a failure to detect a pulmonary nodule which was retrospectively noted only after detection at a subsequent examination. [The missing of these lesions may result in delayed or inappropriate treatment not only for patients being screened for lung cancer, but also for patients with known cancers elsewhere who are being staged or followed for evidence of metastases.] The characteristics of the lesions and their surroundings were measured, and a computer analysis used to identify that combination of parameters (the conspicuity, K) which was best capable of separating the group into populations of missed and detected lesions.

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