Mammographic density is well accepted as a risk factor for breast cancer. Many drawbacks exist for mammographic density measurements. Mammography is a projection 2D image, not a 3D image. Mammography suffers from imperfect calibration of parameters and variation in film exposure factors. Changes in exposure, compression, and processor chemistry may influence the background density of the film and potentially the measured breast density in each study, making comparison between subjects or longitudinally unreliable. Density measured on breast MRI has a great potential to provide a sensitive, quantitative method for evaluating breast density. MRI provides a great soft tissue contrast distinguishing between fibroglandular and fatty tissues;also it provides the 3-dimensional breast coverage;thus is an optimal imaging modality for evaluating fibroglandular density. Despite several studies used MRI aiming for developing automated computer-aided mammographic density analysis, there is little effort to develop a reliable method for monitoring the change breast density over time for individual woman. A quantitative MRI-based measure of """"""""percent fibroglandular density"""""""" may be used to evaluate the changes induced by the chemoprevention drug. Secondary chemoprevention is commonly used for high-risk women who already had diagnosis of breast cancer. Incidence of breast cancer in the contralateral breast increases after treatment of breast caner. The cumulative incidence at 20 years was 15.4%. Tamoxifen was proven effective, and prescribed widely to pre-menopausal patients diagnosed with estrogen receptor positive breast cancer. Despite the promising results, whether to offer chemoprevention, or which drug to give, is solely based on population study results. There is not an individualized method that can be used for a woman to determine whether the chemoprevention is working on her, thus is beneficial over the possible side effects and risks. In this application we propose to use our developed 3D MRI-based quantitative breast density evaluation method to test the specific hypothesis that secondary chemoprevention with tamoxifen (for pre-menopausal women) will reduce the breast density compared to controls. We will also follow all enrolled subjects for future events of breast cancer development. When the data is available we will be able to directly test the hypothesis that reduced density is correlated with lower future cancer events.
Two aims are proposed in this study 1) Aim-1: To evaluate the changes of breast density in pre-menopausal women receiving tamoxifen vs. controls using MRI-based analysis. 2) Aim-2: To obtain mammograms of all patients for density analysis, and compare the results to that based on MRI in terms of measurement variation and changes of density between tamoxifen vs. controls.

Public Health Relevance

Upon completeness of this proposal, we will be able to test the feasibility of a novel 3D MRI- based quantitative method for evaluating breast density in breast cancer patients receiving chemoprevention. The novel MRI technique can accurately monitor the longitudinal change of the breast density in the contralateral breast of patients receiving secondary chemoprevention using tamoxifen. With more understanding of longitudinal breast density change related to incidence of breast cancer, breast density change as a risk factor can be more accurately established for individual patient. This will help to achieve individualized medicine and development of effective chemoprevention strategies.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Small Research Grants (R03)
Project #
1R03CA136071-01A1
Application #
7663554
Study Section
Special Emphasis Panel (ZCA1-SRLB-F (J1))
Program Officer
Marquez, Guillermo
Project Start
2009-03-01
Project End
2011-02-28
Budget Start
2009-03-01
Budget End
2010-02-28
Support Year
1
Fiscal Year
2009
Total Cost
$76,416
Indirect Cost
Name
University of California Irvine
Department
Miscellaneous
Type
Schools of Medicine
DUNS #
046705849
City
Irvine
State
CA
Country
United States
Zip Code
92697
Chen, Jeon-Hor; Liao, Fuyi; Zhang, Yang et al. (2017) 3D MRI for Quantitative Analysis of Quadrant Percent Breast Density: Correlation with Quadrant Location of Breast Cancer. Acad Radiol 24:811-817
Chan, Siwa; Chen, Jeon-Hor; Li, Shunshan et al. (2017) Evaluation of the association between quantitative mammographic density and breast cancer occurred in different quadrants. BMC Cancer 17:274
Chen, Jeon-Hor; Chan, Siwa; Lu, Nan-Han et al. (2016) Opportunistic Breast Density Assessment in Women Receiving Low-dose Chest Computed Tomography Screening. Acad Radiol 23:1154-61
Chen, Jeon-Hor; Chan, Siwa; Tang, Yi-Ting et al. (2015) Impact of positional difference on the measurement of breast density using MRI. Med Phys 42:2268-75
Chen, Jeon Hor; Yu, Hon J; Hsu, Christine et al. (2015) Background Parenchymal Enhancement of the Contralateral Normal Breast: Association with Tumor Response in Breast Cancer Patients Receiving Neoadjuvant Chemotherapy. Transl Oncol 8:204-9
Chen, Jeon-Hor; Su, Min-Ying (2013) Clinical application of magnetic resonance imaging in management of breast cancer patients receiving neoadjuvant chemotherapy. Biomed Res Int 2013:348167
Chen, Jeon-Hor; Chan, Siwa; Yeh, Dah-Cherng et al. (2013) Response of bilateral breasts to the endogenous hormonal fluctuation in a menstrual cycle evaluated using 3D MRI. Magn Reson Imaging 31:538-44
Lin, Muqing; Chen, Jeon-Hor; Wang, Xiaoyong et al. (2013) Template-based automatic breast segmentation on MRI by excluding the chest region. Med Phys 40:122301
Chen, J H; Chen, W P; Chan, S et al. (2013) Correlation of endogenous hormonal levels, fibroglandular tissue volume and percent density measured using 3D MRI during one menstrual cycle. Ann Oncol 24:2329-35
Chen, Jeon-Hor; Yu, Hon; Lin, Muqing et al. (2013) Background parenchymal enhancement in the contralateral normal breast of patients undergoing neoadjuvant chemotherapy measured by DCE-MRI. Magn Reson Imaging 31:1465-71

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