Comparison of the BI-RADS and Kaiser scales for assessing the malignancy of mammary gland formations

Abstract

Diagnosis of breast cancer remains a largely unsolved problem, despite the introduction of screening programs. Recently, magnetic resonance imaging has become more often used not only as a clarifying method, but also as a primary method for diagnosing breast cancer. Unified assessment systems have been developed as tools to assist in decision-making based on the results of radiation examination of the mammary glands: BI-RADS and Kaiser. The BI-RADS score provides a systematic approach to the description of breast images of various modalities. The Kaiser system, on the contrary, is highly specialized and is suitable for interpreting magnetic resonance imaging data only.Purpose. To determine the agreement of experts in assessing breast condition using the BI-RADS and Kaiser scales.Object and methods. We examined 40 patients (average age 45 years), we analyzed 87 neoplasms and areas of changes. The studies were performed on a magnetic resonance imaging scanner with a magnetic field of 1.5 T with appropriate scanning protocols, the results were assessed by independent experts with and without experience. Spearman's correlation analysis and Kendall's coefficient of concordance were used to analyze the results.Results. Spearman's correlation showed a relationship between BI-RADS scores and Kaiser in the inexperienced rater. The agreement between experts was higher when using the Kaiser system - 0.66, using the BI-RADS scale – 0.53.Conclusion. The lack of correlation between BI-RADS and Kaiser scores in an experienced examiner suggests a significant contribution of specific magnetic resonance features. The agreement between experts using the Kaiser system is higher than when using the BI-RADS scale.

Keywords

• breast cancer
• magnetic resonance imaging
• mammary gland
• bi-rads
• kaiser