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Abstract #3432

Assessment of anti-mitotic treatment response in breast cancer using temporal diffusion spectroscopy

xiaoyu jiang1,2, Sean P p Devan1, Jingping Xie1, John C. Gore1,3, and junzhong xu1,4
1Vanderbilt University Institute of Imaging Science, nashville, TN, United States, 2Department of Radiology and Radiological Sciences, Vanderbilt University Institute of Imaging Science, nashville, TN, United States, 3Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, nashville, TN, United States, 4Department of Radiology and Radiological Sciences, Vanderbilt University Medical Center, Nashville, TN, United States

Synopsis

Reliable and sensitive methods for assessing the response of breast cancer to treatment are critical for rapid selection of the most appropriate therapy for individual patients, and development of novel therapies. Paclitaxel has been reported to slow/block mitosis at the metaphase-anaphase transition and induce apoptosis, leading to cell shrinkage and membrane breakdown. Using a biophysical model that allows derivation of microstructural parameters (e.g., cell size d) and an indicator of the intracellular water lifetime (τin ) from the tdiff dependence of diffusion MRI signals, we monitored the treatment response of breast cancer in both cell cultures and solid tumors in vivo.

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