Question

What will not exhibit difusion

Answer 1

Diffusion is the phenomenon by which a substance from its higher concentration moves to the region of lower concentration when they are in contact.

Diffusion cannot take place when:-

• Both objects have same concentration of the particular substance.
• The objects are not in contact.

Thanks

Answer 2

A relative large number of intracranial diseases can show restricted diffusion and may therefore appear bright on diffusion-weighted images. An incomplete listing by category of disease is shown below, with the most common examples highlighted in red:

Causes of restricted diffusion MRI

Intracranial diseases with restricted diffusion (bright on DW images)

The mechanisms responsible for restricted diffusion are incompletely understood and depend on the particular disease being considered. For many disorders several processes may act in concert to reduce the ADC.