What does diffusion show on MRI?

Diffusion MRI (dMRI) is a MRI method that measures molecular diffusion in biological tissues. As molecules interact with many different obstacles as they diffuse throughout tissues, dMRI provides insight into the microscopic details of tissue architecture.

What advantage would an MRI with diffusion?

MR involving diffusion weighted imaging (DWI) shows far greater contrast and is superior at highlighting tissue injury within minutes of a cerebral infarct (​figs 1, 2​, and 3), with a reported sensitivity and specificity of 88%–100% and 86%–100% respectively.

What is a head MRI with diffusion weighted imaging?

Diffusion-weighted MRI allows tumours in the head and neck region to be detected as a high signal intensity lesion on high b-value diffusion-weighted images (Fig. 1) corresponding to a low signal intensity on the calculated ADC map.

What is MRI diffusion weighted?

Diffusion-weighted imaging (DWI) is a form of MR imaging based upon measuring the random Brownian motion of water molecules within a voxel of tissue. In general simplified terms, highly cellular tissues or those with cellular swelling exhibit lower diffusion coefficients.

How does diffusion spectrum imaging work?

Conventional diffusion tensor imaging (DTI) cannot directly image multiple fiber orientations within a single voxel. In comparison, diffusion spectrum imaging (DSI) can detect the multiple fiber orientation within a voxel and allows for delineating crossing and touching fibers in the brain.

What is the purpose of diffusion tensor imaging?

Diffusion tensor imaging (DTI) is a promising method for characterizing microstructural changes or differences with neuropathology and treatment. The diffusion tensor may be used to characterize the magnitude, the degree of anisotropy, and the orientation of directional diffusion.

What is an MRI diffusion weighted?

Diffusion-weighted magnetic resonance imaging (DWI or DW-MRI) is the use of specific MRI sequences as well as software that generates images from the resulting data that uses the diffusion of water molecules to generate contrast in MR images.

Why diffusion tensor imaging is important?

Diffusion Tensor Imaging (DTI)☆ DTI provides image contrast based on differences in the magnitude of diffusion of water molecules within the brain. By measuring the directional dependence of water molecule diffusion, DTI generates unique tissue contrasts that can be used in the study of axonal organization in the CNS.