Tel Aviv University

Other

The United States of America, As Represented by the Secretary, Department of Health and Human Services

Yaniv Assaf

Peter J Basser

Daniel Barazany

A method of identifying brain structures is disclosed. The method comprises imaging the cortex of the brain via inversion recovery magnetic resonance imaging, such that at least two areas are zeroed in terms of their longitudinal relaxation times, and associating the two areas with different brain structures, thereby identifying brain structures.

Method and system for characterizing cortical structures

Magnetic resonance methods include modeling magnetic resonance signals obtained from specimens at low and high q-values to obtain parameters and distributions of parameters associated with specimen structure and orientation. In evaluation of brain white matter specimens, diffusion within axons can be modeled based on hindered diffusion parallel to an axis of the axon and restricted diffusion perpendicular to the axis. Diffusion exterior to axons can be modeled as hindered diffusion with differing diffusivities parallel to and perpendicular to the axis. Based on extracted parameters and associated model functions, distributions of specimen properties such as intra and extra-axonal principal diffusivities and the corresponding principal directions can be estimated. Features of the axon diameter distribution can also be estimated using this approach.

Non-invasive in vivo MRI axon diameter measurement methods

Magnetic resonance methods include modeling magnetic resonance signals obtained from specimens at low and high q-values to obtain parameters associated with specimen structure and orientation. In evaluation of brain white matter specimens, diffusion within axons can be modeled based on hindered diffusion parallel to an axis of the axon and restricted diffusion perpendicular to the axis. Diffusion exterior to axons can be modeled as hindered diffusion with differing diffusivities parallel to and perpendicular to the axis. Based on extracted parameters and associated model functions, specimen properties such as intra and extra-axonal principal diffusivities and the corresponding principal directions can be estimated.

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Tel Aviv, Israel

Yaniv Assaf