Diffusiegewichtte

Diffusiegewichtte, also known as diffusion-weighted imaging (DWI), is a magnetic resonance imaging (MRI) technique used to measure the random motion of water molecules in biological tissues. This motion is influenced by the presence of barriers, such as cell membranes, which restrict the movement of water molecules. In healthy tissues, water molecules can move relatively freely, while in diseased or damaged tissues, the movement is restricted due to the presence of barriers like damaged cell membranes or scar tissue.

DWI is based on the principle that water molecules in tissues will diffuse in different directions and at different rates. By applying a strong magnetic gradient pulse, the MRI scanner can measure the diffusion of water molecules. The diffusion-weighted images produced by DWI can then be used to calculate apparent diffusion coefficient (ADC) maps, which provide quantitative information about the diffusion of water molecules in tissues.

DWI is commonly used in clinical practice to detect and characterize various types of tissue damage, including stroke, traumatic brain injury, and cancer. It is also used in research to study the structure and function of biological tissues. DWI has several advantages over other imaging techniques, including its ability to provide high-resolution images and its non-invasive nature. However, it also has some limitations, such as its sensitivity to motion artifacts and its dependence on the presence of water molecules in tissues.