Abstract
Objectives
Breast cancer is the most common cancer in women and the second leading cause of cancer death. It is well known that breast density is an important risk factor for breast cancer and also can be used to personalize screening and for assessment of treatment response. Breast density has previously been correlated to volumetric water density. The purpose of this study is to validate the accuracy and precision of dual-energy mammography in measuring water density in postmortem breasts.
Methods
Twenty pairs of postmortem breasts were imaged using dual-energy mammography with energy-sensitive photon-counting detectors. Chemical analysis was used as the reference standard to assess the accuracy of dual-energy mammography in measuring volumetric water and lipid density. Images from different views and contralateral breasts were used to assess estimate of precision for water and lipid volumetric density measurements.
Results
The measured volumetric water and lipid density from dual-energy mammography and chemical analysis were in good agreement, where the standard errors of estimates (SEE) of both were calculated to be 2.1%. Volumetric water and lipid density measurements from different views were also in good agreement, with a SEE of 1.3% and 1.1%, respectively.
Conclusions
The results indicate that dual-energy mammography can be used to accurately measure volumetric water and lipid density in breast tissue. Accurate quantification of volumetric water density is expected to enhance its utility as a risk factor for breast cancer and for assessment of response to therapy.
Key Points
• Dual-energy mammography can be used to accurately measure water and lipid volumetric density in breast tissue.
• Improved quantification of volumetric water density is expected to enhance its utility for assessment of response to therapy and as a risk factor for breast cancer.
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Abbreviations
- ASIC:
-
Application-specific integrated circuits
- BI-RADS:
-
Breast Imaging Reporting and Data System
- CC:
-
Craniocaudal
- CT:
-
Computed tomography
- kVp:
-
Kilovolt peak
- mAs:
-
Milliamp Second
- MLO:
-
Mediolateral–oblique
- MRI:
-
Magnetic resonance imaging
- SEE:
-
Standard error of estimate
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Acknowledgments
The authors would like to thank Nikita Kumar and Drs. Bahman Sadeghi, Hanna Javan, and Alfonso Lam Ng for their support in data analysis. They would also like to thank Dr. Erik Fredenberg for valuable technical support and acknowledge Philips Medical Systems for providing the MicroDose mammography system for this research.
Funding
This work was supported in part by NIH/NCI grant R01CA13687.
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The scientific guarantor of this publication is Dr. Sabee Molloi.
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The authors of this manuscript declare a relationship with Philips Medical Systems. The authors do not have any financial and personal relationships with other people or organizations that could inappropriately influence their work.
Statistics and biometry
No complex statistical methods were necessary for this paper.
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Institutional Review Board approval was not required since the study involved only postmortem breast tissue.
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Molloi, S., Ding, H., Cho, HM. et al. Quantification of water and lipid density with dual-energy mammography: validation in postmortem breasts. Eur Radiol 31, 938–946 (2021). https://doi.org/10.1007/s00330-020-07179-9
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DOI: https://doi.org/10.1007/s00330-020-07179-9