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Abstract #2869

Isotropic Restricted Diffusion Correlates with Tumor Cellularity in Pediatric and Adult Malignant Brain Tumors

Zezhong Ye1, Jeffrey D. Viox2, Joshua Lin1, Sam E. Gary3, Jie Zhan4, Chunyu Song1, Ruimeng Yang5, Joshua Rubin6, Sonika Dahiya7, and Sheng-Kwei Song1

1Radiology, Washington University School of Medicine, Saint Louis, MO, United States, 2Medicine, University of Missouri – Kansas City, Kansas City, MO, United States, 3Medical Scientist Training Program, The University of Alabama at Birmingham, Birmingham, AL, United States, 4Radiology, The First Affiliated Hospital of Nanchang University, Nanchang, China, 5Radiology, Guangzhou First People’s Hospital, Guangzhou, China, 6Pediatrics, Washington University School of Medicine, Saint Louis, MO, United States, 7Pathology and Immunology, Washington University School of Medicine, Saint Louis, MO, United States

We demonstrated how ADC inconsistently correlates with histologically determined tumor cellularity rendering it an unreliable imaging biomarker of tumor cellularity in pediatric and adult malignant brain tumors. In contrast, modified-diffusion basis spectrum imaging (DBSI)-derived restricted isotropic diffusion fraction correlated with histology-determined cellularity in pediatric and adult malignant brain tumors.

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