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- Title
Inter- and intra-observer agreement of BI-RADS-based subjective visual estimation of amount of fibroglandular breast tissue with magnetic resonance imaging: comparison to automated quantitative assessment.
- Authors
Wengert, G.; Helbich, T.; Woitek, R.; Kapetas, P.; Clauser, P.; Baltzer, P.; Vogl, W-D.; Weber, M.; Meyer-Baese, A.; Pinker, Katja; Wengert, G J; Helbich, T H; Baltzer, P A
- Abstract
<bold>Purpose: </bold>To evaluate the inter-/intra-observer agreement of BI-RADS-based subjective visual estimation of the amount of fibroglandular tissue (FGT) with magnetic resonance imaging (MRI), and to investigate whether FGT assessment benefits from an automated, observer-independent, quantitative MRI measurement by comparing both approaches.<bold>Materials and Methods: </bold>Eighty women with no imaging abnormalities (BI-RADS 1 and 2) were included in this institutional review board (IRB)-approved prospective study. All women underwent un-enhanced breast MRI. Four radiologists independently assessed FGT with MRI by subjective visual estimation according to BI-RADS. Automated observer-independent quantitative measurement of FGT with MRI was performed using a previously described measurement system. Inter-/intra-observer agreements of qualitative and quantitative FGT measurements were assessed using Cohen's kappa (k).<bold>Results: </bold>Inexperienced readers achieved moderate inter-/intra-observer agreement and experienced readers a substantial inter- and perfect intra-observer agreement for subjective visual estimation of FGT. Practice and experience reduced observer-dependency. Automated observer-independent quantitative measurement of FGT was successfully performed and revealed only fair to moderate agreement (k = 0.209-0.497) with subjective visual estimations of FGT.<bold>Conclusion: </bold>Subjective visual estimation of FGT with MRI shows moderate intra-/inter-observer agreement, which can be improved by practice and experience. Automated observer-independent quantitative measurements of FGT are necessary to allow a standardized risk evaluation.<bold>Key Points: </bold>• Subjective FGT estimation with MRI shows moderate intra-/inter-observer agreement in inexperienced readers. • Inter-observer agreement can be improved by practice and experience. • Automated observer-independent quantitative measurements can provide reliable and standardized assessment of FGT with MRI.
- Subjects
MAGNETIC resonance imaging; BREAST imaging centers; BREAST exams; COHEN'S kappa coefficient (Statistics); CROSS-sectional imaging; BREAST tumors; COMPARATIVE studies; LONGITUDINAL method; RESEARCH methodology; MEDICAL cooperation; RESEARCH; RESEARCH funding; EVALUATION research; RESEARCH bias
- Publication
European Radiology, 2016, Vol 26, Issue 11, p3917
- ISSN
0938-7994
- Publication type
journal article
- DOI
10.1007/s00330-016-4274-x