We propose to test whether HiSS MRI estimates breast cancer risk more accurately than conventional fat- suppressed MRI and X-ray mammography. Reliable measurements of breast density, which is one of the strongest independent risk factors for breast cancer, could significantly improve management of risk and preventive treatment. X-ray mammography predicts increased cancer risk on a population basis but has limited value for guiding treatment of individual patients, due to errors in separation of parenchyma and fat, and errors in measurement of the parenchymal volume. MRI allows 3D imaging of breast parenchyma and detects independent signals from water and fat. MRI detects significant decreases in breast density due to tamoxifen and raloxifen. However, conventional MRI requires suppression of signals from fat in the breast. Fat suppression is sometimes non-uniform and fat suppression pulses affect the water resonance, reducing the accuracy of parenchymal volume measurements. Therefore we propose an innovative approach to measurement of breast cancer risk: We will use high spectral and spatial resolution MR imaging (HiSS MRI) to reliably separate water and fat signals, and to quantitatively measure parenchymal density and changes in breast density due to tamoxifen. We hypothesize that use of quantitative HiSS imaging will reduce variability, standardize measurements, and increase sensitivity to variations in parenchymal volume. In addition, HiSS may provide new markers for risk based on the novel computer-aided diagnosis (CAD) analysis of the enhanced texture of HiSS images, and HiSS images of fat distribution. This proposal builds on work in this laboratory that implemented HiSS MRI on clinical magnets and demonstrated significant advantages of this approach. We propose the following Specific Aims:
Aim #1 : Implement quantitative full bilateral measurements of breast parenchymal density and morphology with HiSS MRI. Phantoms attached to the breast will be used to accurately measure MRI- detectable proton density. Novel software will evaluate parenchymal volume and texture. Fat distribution and composition will be tested as additional markers for risk.
Aim #2. Compare HiSS with conventional approaches: We will compare breast density measured with HiSS, conventional fat-suppressed MRI, Dixon MRI methods, and X-ray mammography. Measures of breast density will include absolute and fractional parenchymal volume, and MRI-detectable water proton density. The variability of HiSS and conventional MRI measurements will be compared.
Aim #3. Measure changes in parenchymal density due to selective estrogen receptor modulator (SERM) therapy: As a measure of the sensitivity of HiSS MRI to changes in breast cancer risk, we propose to image response to preventive therapy that is known to reduce risk. We will compare the sensitivity of HiSS MRI to effects of tamoxifen therapy with that of 2D X-ray mammography and conventional MRI.
The goal of this research is the development and validation of quantitative, robust functional and anatomical imaging methods to predict and assess response of breast parenchyma to preventive therapy. Such tools would allow faster and cheaper drug trials, facilitating discoveries of new therapeutic agents. In addition, it may be possible to predct a specific patient's response to therapy, allowing individualized, more effective treatment plans.
|Pineda, Federico D; Medved, Milica; Wang, Shiyang et al. (2016) Ultrafast Bilateral DCE-MRI of the Breast with Conventional Fourier Sampling: Preliminary Evaluation of Semi-quantitative Analysis. Acad Radiol 23:1137-44|
|Pineda, Federico D; Medved, Milica; Fan, Xiaobing et al. (2016) B1 and T1 mapping of the breast with a reference tissue method. Magn Reson Med 75:1565-73|
|Mustafi, Devkumar; Zamora, Marta; Fan, Xiaobing et al. (2015) MRI accurately identifies early murine mammary cancers and reliably differentiates between in situ and invasive cancer: correlation of MRI with histology. NMR Biomed 28:1078-86|
|Weiss, William A; Medved, Milica; Karczmar, Gregory S et al. (2015) Preliminary assessment of dispersion versus absorption analysis of high spectral and spatial resolution magnetic resonance images in the diagnosis of breast cancer. J Med Imaging (Bellingham) 2:024502|
|Markiewicz, Erica; Fan, Xiaobing; Mustafi, Devkumar et al. (2015) High resolution 3D MRI of mouse mammary glands with intra-ductal injection of contrast media. Magn Reson Imaging 33:161-5|
|Mustafi, Devkumar; Ward, Jesse; Dougherty, Urszula et al. (2015) X-ray fluorescence microscopy demonstrates preferential accumulation of a vanadium-based magnetic resonance imaging contrast agent in murine colonic tumors. Mol Imaging 14:|
|Mustafi, Devkumar; Fan, Xiaobing; Peng, Bo et al. (2015) Using MRI to detect and differentiate calcium oxalate and calcium hydroxyapatite crystals in air-bubble-free phantom. Phys Med 31:1075-9|
|Pineda, F D; Medved, M; Fan, X et al. (2015) Comparison of dynamic contrast-enhanced MRI parameters of breast lesions at 1.5 and 3.0â€‰T: a pilot study. Br J Radiol 88:20150021|
|Weiss, William A; Medved, Milica; Karczmar, Gregory S et al. (2014) Residual analysis of the water resonance signal in breast lesions imaged with high spectral and spatial resolution (HiSS) MRI: a pilot study. Med Phys 41:012303|
|Wood, Abbie M; Medved, Milica; Bacchus, Ian D et al. (2013) Classification of breast lesions pre-contrast injection using water resonance lineshape analysis. NMR Biomed 26:569-77|