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Abstract #0466

Quantifying Axonal Injury, Demylination & Inflammation in Human MS Autopsy Specimens Using Diffusion Basis Spectrum Imaging (DBSI)

SUMMA25Yong Wang1, Qing Wang1, Mingqiang Xie2, Anne H. Cross2, Sheng-Kwei Song1

1Radiology, Washington University in St. Louis, Saint Louis, MO, United States; 2Neurology, Washington University in St. Louis, Saint Louis, MO, United States

During CNS pathology, cellularity is enhanced due to increased numbers of microglia, astrocytes and infiltrating inflammatory cells such as macrophages and lymphocytes. Presence of these cells could potentially confound white matter pathology as assessed using DTI. Diffusion basis spectrum imaging (DBSI) has been developed to accurately quantify the extent of cellularity as well as the degree of axonal injury and demyelination in a cuprizone-treated mouse model. In this study, autopsy spinal cord specimens of MS patients were examined to correlate DBSI findings with immunohistochemistry (IHC). Preliminary data indicated that DBSI findings are consistent with IHC results, supporting its clinical application.

Keywords

accurately acquisition address anisotropic anti antibodies antibody applied approximation autopsied autopsy axial axon basic basis bath blinded blocked blood blue brain bundles caliber camera capability cell cells close coil column community comparing complications component components computed confounds considered consistent consisting console contained control cord cords correlate cross crossing cylindrically death derived determined developing diameter diffuse diffusion direct dorsal embedded employed equipped estimation examined examining example extremity fibers findings fitting fixed formalin global goat gradient gradients green histology human identified in vivo independently infiltrating infiltration inflammatory injury integrity isotropic lewis linear lymphocytes macrophages magnet maps marked minutes moderate monoclonal mouse nonlinear nonspecific numbness optimization paraffin pathology placed presence preserved press prevent processing profiles quantify quantifying real recorded reduce registered relatively repetition resolve restricted retrieved rinse rise room saint search sections sensitizing served severe severity significantly slice slices sliding software solenoid specimens spectrum spinal squares staining suggesting suggests syringe tend typical vary washing white zero