Digital Breast Tomosynthesis Spot Compression Clarifies Ambiguous Findings | Imaging Technology News

52-Year-Old Woman Presenting for Asymmetry of Right Breast: (A) DBT craniocaudal view shows asymmetry (arrow) in medial right breast (DBT). (B) DBT spot compression view shows asymmetry does not persist (arrowhead). Lesion classified on DBT without, and DBT with, DBT spot compression view as BI-RADS category 4a and 2 by reader 1, category 4a and 2 by reader 2, and category 4b and 2 by reader 3. Follow-up imaging at one year demonstrated stability of finding, consistent with benignity in present analysis.

52岁，女性，右乳房不对称:(A) DBT颅侧切面显示右乳房内侧(DBT)不对称(箭头)。(B) DBT点压缩视图显示不对称不存在(箭头)。DBT上无DBT、有DBT、DBT斑压缩视图上的病变被解读为BI-RADS的4a和2类，解读器1分类为4a和2类，解读器2分类为4a和2类，解读器3分类为4b和2类。一年后的随访成像显示发现的稳定性，与目前分析的良性一致。

February 16, 2022—According to an article in ARRS’ American Journal of Roentgenology (AJR),digital breast tomosynthesis(DBT)斑压缩视图可以帮助鉴别不明确的DBT发现，从而减少良性发现的进一步检查。

Noting that DBT spot compression increased both intrareader and interreader agreement and improved diagnostic accuracy, primarily from improved specificity, “the view’s supplemental dose was slightly higher than that of a standard DBT view,” corresponding author Foucauld Chamming’s of Institut Bergonié in Bordeaux, France acknowledged.

The all-French team’sretrospective studyincluded 102 women (mean age, 60 years) for whom a DBT spot compression was acquired to characterize an equivocal finding on DBT (via the performing radiologist’s discretion) from December 14, 2018 to December 18, 2019. Conscious of the equivocal lesions’ location, two fellowship-trained breast radiologists and one breast imaging fellow independently reviewed all examinations—assigning an initialBI-RADS categoryusing standard DBT views, immediately followed by a category using DBT spot compression.

Based on kappa coefficients for DBT with and without spot compression views, intrareader agreement increased from 0.43 to 0.72, and interreader agreement increased from 0.21 to 0.45. Additionally, for all three readers, DBT spot compression views yielded significantly increased accuracy, as well as significantly increased specificity.

Adding that their study is the first to evaluate the impact of obtaining DBT spot compression for equivocal findings on DBT, “the results support the utility of spot compression views for aiding evaluation of subtle or ambiguous findings encountered on DBT in clinical practice,”the authors of this AJR article concluded.

For more information:www.arrs.org