diffusion weighted imaging

(redirected from Diffusion imaging)

diffusion weighted imaging

MRIs with intensity proportional to the diffusion constant of water; because of the impaired movement of water in myelin, the signal is strongest parallel to nerve tracts; used primarily to evaluate edema in acute stroke, but also shows demyelinating diseases, and has been used in mapping muscle fiber direction in the heart.
Synonym(s): diffusion imaging

diffusion weighted imaging

In magnetic resonance imaging, the use of changes in the movement of water through tissues as a contrast medium. Diffusion weighted imaging has been used in the diagnosis of strokes and other neurological diseases as well as abdominal and musculoskeletal injuries and diseases.
See also: imaging
References in periodicals archive ?
With the aid of the DTI Studio system, the equatorial portion of intervertebral discs was selected for diffusion imaging.
MR diffusion imaging and MR spectroscopy of maple syrup urine disease during acute metabolic decompensation.
Advanced imaging techniques such as diffusion imaging have markedly improved the specificity of MRI in differentiation between pituitary abscesses and tumors, since increase in diffusion signal and decrease of apparent diffusion coefficient are typical for abscesses, whereas necrotic masses show decreased signal on diffusion sequence and elevation of apparent diffusion coefficient(2).
General diffusion imaging is a type of MRI developed in the early 1990s for use in humans that is based on the random motion of water molecules.
Adopting an advanced form of DTI known as high-angular resolution diffusion imaging (HARDI) would allow for complex modeling within a voxel; however, HARDI requires longer scan times compared to DTI [41].
Out of the 52 lesions also seen on conventional imaging, the extent of the lesions were better detected with diffusion imaging.
Going beyond conventional morphological imaging, the book presents an overview of functional imaging techniques and several chapters on perfusion and diffusion imaging.
Perfusion and diffusion imaging are recent advances that can help predict tumor type and grade, as well as predict patient survival and optimal therapeutic options.
Their topics include the anatomy of diffusion measurement, principles of diffusion tensor imaging, the mathematics, practical aspects, new image contrasts, high angular resolution diffusion imaging, three-dimensional tract reconstruction, and quantitative approaches.
0, with FOCUS, takes Diffusion Imaging to the next level with the ability to optimize for image quality and signal to noise.
These specific sequences show hyposignal on T2 imaging (2A), restriction of diffusion imaging (2B) and rapid and homogenous contrast enhancing with rapid washout (2C).

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