Abstract
Objectives
To compare automated breast volume scanner (ABVS), ultrasound (US) and MRI in measuring breast cancer size, and evaluate the agreement between ABVS and US in assessing lesion location and sonographic features.
Methods
We retrospectively included 98 women with 100 index cancers who had undergone US and ABVS followed by 1.5T MRI. Images were interpreted by a pool of readers reporting lesion size, location and breast imaging reporting and data system (BI-RADS) features. Bland-Altman analysis (with logarithmic data transformation), intraclass correlation coefficient (ICC) and Cohen’s kappa statistic were used for statistical analysis.
Results
MRI showed the best absolute agreement with histology in measuring cancer size (ICC 0.93), with LOA comparable to those of ABVS (0.63–1.99 vs. 0.52–1.73, respectively). Though ABVS and US had highly concordant measurements (ICC 0.95), ABVS showed better agreement with histology (LOA 0.52–1.73 vs. 0.45–1.86, respectively), corresponding to a higher ICC (0.85 vs. 0.75, respectively). Except for posterior features (k=0.39), the agreement between US and ABVS in attributing site and BI-RADS features ranged from substantial to almost perfect (k=0.68–0.85).
Conclusions
ABVS performs better than US and approaches MRI in predicting breast cancer size. ABVS performs comparably to US in sonographic assessment of lesions.
Key Points
• ABVS approaches MRI in predicting breast cancer size.
• ABVS is equivalent to US in localising and characterising breast cancer.
• ABVS is more accurate than US in assessing breast cancer size.
• ABVS has the potential to replace US in breast cancer staging.
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The scientific guarantor of this publication is Chiara Zuiani.
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The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article.
Statistics and biometry
One of the authors, Rossano Girometti, has significant statistical expertise.
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Written informed consent was obtained from all subjects (patients) in this study.
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Institutional Review Board approval was obtained.
Methodology
• retrospective
• observational
• performed at one institution
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Girometti, R., Zanotel, M., Londero, V. et al. Automated breast volume scanner (ABVS) in assessing breast cancer size: A comparison with conventional ultrasound and magnetic resonance imaging. Eur Radiol 28, 1000–1008 (2018). https://doi.org/10.1007/s00330-017-5074-7
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DOI: https://doi.org/10.1007/s00330-017-5074-7