Woo Jung Choi MD, Presenter: Nothing to Disclose

Eun Young Chae, Abstract Co-Author: Nothing to Disclose

Hee Jung Shin MD, Abstract Co-Author: Nothing to Disclose

Hyun Ji Kim, Abstract Co-Author: Nothing to Disclose

Hyunkyung Yoo, Abstract Co-Author: Nothing to Disclose

Hak Hee Kim MD, Abstract Co-Author: Nothing to Disclose

Joo Hee Cha, Abstract Co-Author: Nothing to Disclose

To evaluate the diagnostic performance of automated US of the breast as a replacement tool of second-look US performed after breast MRI.

During five months, we evaluated 58 consecutive patients (mean age, 45 years; range, 30~ 62 years) with breast cancer, who had additional suspicious lesions detected on breast MRI. All patients underwent hand-held second-look US (HH-SLUS) and automated breast US (ABUS). Three breast radiologists reviewed the detectability, location, characteristics, and conspicuity of these lesions on ABUS. We also evaluated the interobserver variability and compared with the results of HH-SLUS. Kappa statistics and intraclass correlation coefficient (ICC) were used for statistical analysis.

There were 80 additional suspicious lesions identified by breast MRI. Among them, 14 lesions (14/80,17.5%) were not detected on HH-SLUS. Eight lesions (8/14, 57%) were detected on ABUS by at least 2 readers whereas the remaining 6 (43%) were not detected on ABUS. Among 66 lesions detected on HH-SLUS, only three lesions (3/80, 4%) were not detected on ABUS. ICCs for lesion location and size all exceeded 0.75, indicating high reliability. Substantial agreement was found for mass shape, orientation, margin, and BIRADS final assessments (k = 0.71, 0.72, 0.61, and 0.63, respectively).

ABUS could reliably detect the additional suspicious lesions identified by breast MRI. Therefore, ABUS could reduce the cost and time of HH-SLUS and it might be helpful to decide the biopsy guidance method (US-guided vs. MR-guided).

ABUS could play a role as a replacement tool of hand-held second-look US for evaluating the additional suspicious lesions identified by breast MRI.

Choi, W, Chae, E, Shin, H, Kim, H, Yoo, H, Kim, H, Cha, J, Diagnostic Performance of Automated Breast US as a Replacement Tool of Hand-held Second-look US.  Radiological Society of North America 2012 Scientific Assembly and Annual Meeting, November 25 - November 30, 2012 ,Chicago IL. http://archive.rsna.org/2012/12034539.html