CRRS-4 Pivotal Somo•v™ ABUS ROC Reader Observer Study

Study Summary

To determine the impact on Interpreting Physician performance in detecting breast cancer, as defined by the area under the Receiver Operating Characteristic Curve (ROC), when Automated Breast Ultrasound (ABUS) and screening mammography (XRM) are combined, compared to screening mammography alone in asymptomatic women with \>50% parenchymal density and a screening mammogram assigned a BI-RADS Assessment Category 1 (negative) or 2 (normal with benign findings). The effect of the improved Reader performance is illustrated by plotting the ROC curves for XRM alone and XRM+ABUS. If Reader performance improves with the addition of ABUS to the XRM, the area under the curve (AUC) for XRM+ABUS (AUCXRM+ABUS) will be greater than the area under the curve for XRM Alone (AUCXRM Alone). This difference is represented as ∆AUCABUS. The null and alternative hypotheses can be formally expressed as follows: H0: ∆AUCABUS = 0, AUCXRM+ABUS = AUCXRM Alone The null hypothesis is that Reader performance will be unchanged with the addition of ABUS to a screening mammogram assigned a BI-RADS Assessment Category of 1 or 2. HA: ∆AUCABUS ≠ 0, AUCXRM+ABUS ≠ AUCXRM Alone The alternative hypothesis is that Reader performance will be changed with the addition of ABUS to a screening mammogram assigned a BI-RADS Assessment Category of 1 or 2. A statistically significant change will be considered equivalent to a statistically significant improvement if the estimated value of AUCXRM+ABUS is greater than that of AUCXRM Alone with statistical significance at an alpha level of .05 for a two-sided test.

Conditions Studied

Interventions

• DEVICE Automated Breast Ultrasound (ABUS)

Study Locations (1)