Differentiation of ductal carcinoma in-situ from benign micro-calcifications by dedicated breast computed tomography

Shadi Aminololama-Shakeri, Craig K. Abbey, Peymon Gazi, Nicolas Prionas, Anita Nosratieh, Chin Shang Li, John M. Boone, Karen K. Lindfors

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

Purpose Compare conspicuity of ductal carcinoma in-situ (DCIS) to benign calcifications on unenhanced (bCT), contrast-enhanced dedicated breast CT (CEbCT) and mammography (DM). Methods and materials The institutional review board approved this HIPAA-compliant study. 42 women with Breast Imaging Reporting and Data System 4 or 5 category micro-calcifications had breast CT before biopsy. Three subjects with invasive disease at surgery were excluded. Two breast radiologists independently compared lesion conspicuity scores (CS) for CEbCT, to bCT and DM. Enhancement was measured in Hounsfield units (HU). Mean CS ± standard deviations are shown. Receiver operating characteristic analysis (ROC) measured radiologists' discrimination performance by comparing CS to enhancement alone. Statistical measurements were made using ANOVA F-test, Wilcoxon rank-sum test and robust linear regression analyses. Results 39 lesions (17 DCIS, 22 benign) were analyzed. DCIS (8.5 ± 0.9, n = 17) was more conspicuous than benign micro-calcifications (3.6 ± 2.9, n = 22; p <0.0001) on CEbCT. DCIS was equally conspicuous on CEbCT and DM (8.5 ± 0.9, 8.7 ± 0.8, n = 17; p = 0.85) and more conspicuous when compared to bCT (5.3 ± 2.6, n = 17; p <0.001). All DCIS enhanced; mean enhancement (90HU ± 53HU, n = 17) was higher compared to benign lesions (33 ± 30HU, n = 22) (p <0.0001). ROC analysis of the radiologists' CS showed high discrimination performance (AUC = 0.94) compared to enhancement alone (AUC = 0.85) (p <0.026). Conclusion DCIS is more conspicuous than benign micro-calcifications on CEbCT. DCIS visualization on CEbCT is equal to mammography but improved compared to bCT. Radiologists' discrimination performance using CEBCT is significantly higher than enhancement values alone. CEbCT may have an advantage over mammography by reducing false positive examinations when calcifications are analyzed.

Original languageEnglish (US)
Pages (from-to)297-303
Number of pages7
JournalEuropean Journal of Radiology
Volume85
Issue number1
DOIs
StatePublished - Jan 1 2016

Keywords

  • Breast CT
  • Contrast enhanced breast CT
  • DCIS
  • Ductal carcinoma in-situ
  • Micro calcifications

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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