Yi Hong Chou, Presenter: Nothing to Disclose

Chui-Mei Tiu MD, Abstract Co-Author: Nothing to Disclose

Hui-Ru Chiang, Abstract Co-Author: Nothing to Disclose

Siew-Peng Chen BA, Abstract Co-Author: Nothing to Disclose

Hong-Jen Chiou MD, Abstract Co-Author: Nothing to Disclose

See-Ying Chiou MD, Abstract Co-Author: Nothing to Disclose

Chao-Hsuan Yen MD, Abstract Co-Author: Nothing to Disclose

Hsin-Kai Wang MD, Abstract Co-Author: Nothing to Disclose

Cheng-Yen Chang MD, Abstract Co-Author: Nothing to Disclose

et al, Abstract Co-Author: Nothing to Disclose

To determine the diagnostic reliability of ultrasound (US) features based on an automated full-breast ultrasound system (ABUS) and final assessment categories using ACR BI-RADS US category for breast lesions.

182 ABUS-studied breast lesions were histologically proved by either percutaneous biopsy or surgery. They were retrospectively assessed by 2 experienced radiologists who are unware of the clinical information and diagnosis. All lesions were classified according to BI-RADS descriptors and categories. The diagnostic reliability including sensitivity, specificity, positive and negative predictive values (PPV and NPV) of the ABUS features and categories were calculated.

There were 47 carcinomas and 135 benign lesions. 89 lesions were assigned to class II (all were benign lesions), 27 to class III (1 malignant and 26 benign lesions), 25 to class IV (10 malignant and 15 benign lesions), 41 to class V (36 malignant and 5 benign lesions). ACR BI-RADS US category showed an accuracy of 0.88, sensitivity 0.98, specificity 0.85, PPV 0.70 and NPV 0.99. Irregular shape, nonparallel orientation, noncircumscribed margin, and shadowing were the major signs of malignancy. The most common causes of false positive results were focal fibrosis, papillomas, scar tissues, and echogenic cysts.

The ACR BI-RADS US categories can be applied in an ABUS study for quantification of the likelihood of carcinoma. The diagnostic reliability of ABUS in differentiating benign from malignant breast lesions should be based on the sonomorphological information obtianed from all the images.

The ACR BI-RADS US categories can be applied in an ABUS study for quantification of the likelihood of carcinoma. The diagnostic reliability of ABUS in differentiating benign from malignant breast lesions should be based on the sonomorphological information obtianed from all the images.

Chou, Y, Tiu, C, Chiang, H, Chen, S, Chiou, H, Chiou, S, Yen, C, Wang, H, Chang, C, et al, , Ultrasound ACR BI-RADS Categories Applied in an Automated Breast Ultrasound System: Diagnostic Reliability.  Radiological Society of North America 2006 Scientific Assembly and Annual Meeting, November 26 - December 1, 2006 ,Chicago IL. http://archive.rsna.org/2006/4431223.html