Breast Density Distribution of Thai Women in Thammasat University Hospital; Comparison between The 4th and The 5th Edition of ACR BI-RADS
Wanrudee Lohitvisate MD*, Mavit Dechopongpaibool MD*, Kaan Tangtiang MD*
Affiliation : * Department of Radiology, Faculty of Medicine, Thammasat University, Pathumthani, Thailand
Background : Recently, American College of Radiology issued the latest 5th edition of BI-RADS Atlas which changed nomenclature
and method to categorized breast composition.
Objective : To compare breast composition distribution between the 4th and the 5th edition of BI-RADS and to evaluate reader
variability of breast composition according to the 5th edition.
Material and Method: Comparison of breast composition distribution between the 4th and the 5th edition of BI-RADS;
interobserver and intraobserver agreement of breast composition of the 5th edition of BI-RADS between groups of readers
were analyzed using 300 cases with mammography from January 2013 to December 2013.
Results : The breast composition distribution between the 4th and the 5th edition of BI-RADS had high correlation. The 5th
edition BI-RADS had moderate to substantial interobserver agreement and substantial to almost perfect intraobserver
agreement.
Conclusion : The breast composition distribution had no significant difference between the 4th edition and the 5th edition of
BI-RADS. The 5th edition of BI-RADS also had good interobserver agreement among radiologists.
Keywords : BI-RADS, Breast density, Interobserver, Intraobserver
