期刊
EUROPEAN JOURNAL OF RADIOLOGY
卷 85, 期 1, 页码 297-303出版社
ELSEVIER IRELAND LTD
DOI: 10.1016/j.ejrad.2015.09.020
关键词
Contrast enhanced breast CT; Breast CT; DCIS; Micro calcifications; Ductal carcinoma in situ
资金
- National Institutes of Health (NIH) [R01 EB002138, R21-EB018939]
- National Center for Research Resources (NCRR) of the National Institutes of Health (NIH) [UL1 RR024146]
- NIH Roadmap for Medical Research
- NATIONAL CENTER FOR RESEARCH RESOURCES [UL1RR024146] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF BIOMEDICAL IMAGING AND BIOENGINEERING [R01EB002138, R21EB018939] Funding Source: NIH RePORTER
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. (C) 2015 Elsevier Ireland Ltd. All rights reserved.
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