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Abstract #3380

Quantitative DCE-MRI Assessment of Breast Cancer Therapeutic Response: How Long Is the Acquisition Time Necessary?

Mohan L. Jayatilake1, Xin Li1, Alina Tudorica1, Karen Oh1, Nicole Roy1, Stephen Chui1, Wei Huang1

1Oregon Health & Science University, Portland, OR, United States

Breast cancer patients underwent DCE-MRI studies before, after first cycle, at midpoint, and after completion of neoadjuvant chemotherapy. Ktrans and kep after first therapy cycle and their % changes (relative to baseline) provide early discrimination of pathologic complete responders (pCRs) from non-pCRs. Representative 10-min long DCE-MRI data from one pCR and one non-pCR were reprocessed with simulated acquisition time as short as ~ 3 min. It was found that DCE-MRI acquisition time of 5-6 min is sufficient for the purpose of early prediction of therapy response. Shorter DCE-MRI protocol reduces patient discomfort and minimizes motion artifacts.