The general aim of this project is to improve dynamic contrast enhanced (DCE) MRI capability for benign and malignant breast disease discrimination, using a new analytical pharmacokinetic approach - the Shutter- Speed Model (SSM). Breast cancer is the second leading cause of cancer death in women. Though MRI has higher sensitivity than mammography and ultrasound for breast cancer detection, all three imaging modalities have limited specificities. This leads to possibly unnecessary (benign) biopsies, as well as undesirable complications and patient care consequences. There are three basic approaches for analyzing DCE MRI signal time-courses: qualitative subjective assessment, empirical quantitation, and analytical modeling. The last is most desirable, since the pharmacokinetic parameters extracted should be independent of data acquisition details, contrast reagent (CR) dose and injection rate, personal skill, etc. The conventional analysis - the Standard Model (SM) - ignores equilibrium transcytolemmal water exchange effects during CR bolus passage through the lesion, which can lead to significant underestimation, and CR dose- and injection rate-dependence, of the pharmacokinetic parameters, and thus low specificity. Preliminary SSM analyses (accounting for water exchange effects) of DCE MRI data from 22 patients eliminate the CR administration dependencies, and show perfect sensitivity and specificity.
The specific aims are: 1.) Evaluate the hypothesis that SSM analyses of DCE MRI data will significantly improve benign and malignant breast disease discrimination (compared to the SM approach) in a statistically significant population. 2.) Determine the SSM pharmacokinetic parameter thresholds that separate benign and malignant breast lesions with highest positive predictive value without sacrificing sensitivity. 3.) Evaluate the effects of varying temporal resolution and arterial input function determination on 1.) and 2.). T1-weighted gradient echo DCE MRI data from patients with clinically suspicious lesions will be collected during their scheduled MRI-guided preoperative needle localization or biopsy procedures, and will be analyzed with both SM and SSM. The pharmacokinetic parameters will be correlated with pathology results for statistical analyses. If successful, this SSM method may potentially be incorporated into clinical breast MRI protocols to reduce possibly unnecessary (benign) biopsies, and may be valuable in monitoring cancer treatment.

Agency
National Institute of Health (NIH)
Institute
National Cancer Institute (NCI)
Type
Research Project (R01)
Project #
5R01CA120861-03
Application #
7682573
Study Section
Medical Imaging Study Section (MEDI)
Program Officer
Croft, Barbara
Project Start
2007-09-17
Project End
2012-07-31
Budget Start
2009-08-01
Budget End
2012-07-31
Support Year
3
Fiscal Year
2009
Total Cost
$269,035
Indirect Cost
Name
Oregon Health and Science University
Department
Physiology
Type
Schools of Medicine
DUNS #
096997515
City
Portland
State
OR
Country
United States
Zip Code
97239
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Meyer, Janelle M; Perlewitz, Kelly S; Hayden, James B et al. (2013) Phase I trial of preoperative chemoradiation plus sorafenib for high-risk extremity soft tissue sarcomas with dynamic contrast-enhanced MRI correlates. Clin Cancer Res 19:6902-11
Li, Xin; Priest, Ryan A; Woodward, William J et al. (2013) Feasibility of shutter-speed DCE-MRI for improved prostate cancer detection. Magn Reson Med 69:171-8
Li, Xin; Huang, Wei; Rooney, William D (2012) Signal-to-noise ratio, contrast-to-noise ratio and pharmacokinetic modeling considerations in dynamic contrast-enhanced magnetic resonance imaging. Magn Reson Imaging 30:1313-22
Tudorica, Luminita A; Oh, Karen Y; Roy, Nicole et al. (2012) A feasible high spatiotemporal resolution breast DCE-MRI protocol for clinical settings. Magn Reson Imaging 30:1257-67
Huang, Wei; Tudorica, Luminita A; Li, Xin et al. (2011) Discrimination of benign and malignant breast lesions by using shutter-speed dynamic contrast-enhanced MR imaging. Radiology 261:394-403
Thakur, S B; Yaligar, J; Koutcher, J A (2009) In vivo lactate signal enhancement using binomial spectral-selective pulses in selective MQ coherence (SS-SelMQC) spectroscopy. Magn Reson Med 62:591-8
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Huang, Wei; Li, Xin; Morris, Elizabeth A et al. (2008) The magnetic resonance shutter speed discriminates vascular properties of malignant and benign breast tumors in vivo. Proc Natl Acad Sci U S A 105:17943-8