Mechanisms of Localization:

Passive or Simple Diffusion

• MECHANISM: PASSIVE DIFFUSION OR SIMPLE DIFFUSION

  • Following inhalation of Xe-gas, some of the Xe undergoes passive diffusion through membranes in the lungs due to its lipophilic nature and is transported via the blood stream to other parts of the body. This resulting blood concentration permits performance of a cerebral blood flow study

   

  • Cerebral blood flow may be measured following inhalation of Xe-133 gas.