Statement: the primary trial and the secondary trial are both evaluating imaging techniques.
Primary_evidence: INTERVENTION 1:    All Study Participants, PA Compression Image Sets   All image sets (30 patient-assisted compression image sets) were evaluated for acceptability of overall clinical image quality by two (2) readers. INTERVENTION 2:    All Study Participants, TC Compression Image Sets   All image sets (30 TC compression image sets) were evaluated for acceptability of overall clinical image quality by two (2) readers.
Secondary_evidence: INTERVENTION 1:    Overall Population   Each subject served as her own control, with imaging of each mass by both the test and control modalities. Specificity difference is a single measure for the overall ITD population.