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Abstract #2574

Imaging analysis of subcutaneous tumors based on time-dependent diffusion MRI

Sosuke Yoshinaga1, Atsushi Takeda1, Takuto Shinjo1, Yuki Kawachi1, Yuya Terashima2, Etsuko Toda3, Kouji Matsushima2, Tomokazu Tsurugizawa4, and Hiroaki Terasawa1
1Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan, 2Research Institute for Biomedical Sciences, Tokyo University of Science, Noda, Chiba, Japan, 3Nippon Medical School, Tokyo, Japan, 4National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan

Synopsis

Keywords: Microstructure, Tumor

Motivation: Diffusion MRI is a non-invasive imaging method that depicts the water molecule diffusion, but its use for studying peripheral cancers has lagged behind that for deep cancers.

Goal(s): To develop a highly accurate MRI method of peripheral cancer diagnosis that is comparable to biopsy-based diagnosis.

Approach: To determine the differences in diffusion time-dependency between subcutaneous tumor tissues from normal tissues in tumor-bearing mouse models, we utilized a wide range of diffusion times and obtained information about intra- and inter-tumor cell microstructures.

Results: In subcutaneous tumor models, time-dependent diffusion MRI can discriminate tumor tissues and identify cancer cell lines.

Impact: The improved MRI method for non-invasive tumor diagnosis based on time-dependent diffusion MRI not only helps physicians determine the grade of malignancy, but also contributes to early detection by its ability to evaluate microstructures.

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Keywords