What is meant by isotropic diffusion? [closed]

1. What is anisotropic diffusion in MRI?
2. What is anisotropic diffusion filtering?
3. Is CSF isotropic?
4. What is diffusion filter image processing?

What is anisotropic diffusion in MRI?

In brain imaging, diffusion anisotropy is a manifestation of tissues obstructing the otherwise free diffusion of water molecules. Brain tissues with different structural make-ups, e.g. healthy or diseased, influence the diffusion differently [Moseley et al., 1990, Beaulieu, 2002].

What is anisotropic diffusion filtering?

In image processing and computer vision, anisotropic diffusion, also called Perona–Malik diffusion, is a technique aiming at reducing image noise without removing significant parts of the image content, typically edges, lines or other details that are important for the interpretation of the image.

Is CSF isotropic?

Diffusion in white matter (WM) neural tracts is anisotropic: it is larger parallel to the tract than in the perpendicular direction. In liquid, such as cerebrospinal fluid (CSF), diffusion is isotropic, i.e., equal in all directions.

What is diffusion filter image processing?

Diffusion-based filtering is a technique intended to remove image noise, or image artifacts, by smoothing the data without loosing relevant information like edges or other high frequency image elements.