Details

Autor(en) / Beteiligte

• Huang, Li
• Ling, Xue-ying
• Liu, Si-run

Titel

Diffusion tensor imaging on white matter in normal adults and elderly patients with hypertension

Ist Teil von

• Chinese medical journal, 2006-08, Vol.119 (15), p.1304-1307

Ort / Verlag

China: Medical Imaging Center, First Affiliated Hospital, Jinan University,Guangzhou 510630, China

Erscheinungsjahr

2006

Quelle

MEDLINE

Beschreibungen/Notizen

• Diffusion-weighted magnetic resonance imaging （MRI） exploits the properties of randomlymoving water molecules in the presence of magnetic field gradients. Within tissue, diffusion of water molecules is restricted by cell membranes, small vessels, axon cylinders, membrane, chemical interactions of water and macromolecules. In the brain, water diffusion exhibits directionality in the orientation along the long axis of white matter. This is referred to as ＂diffusion anisotropy＂. Diffusion anisotropy can be measured via diffusion tensor imaging （DTI）. There is a class of anisotropy indices that reflect the degree of anisotropy of water diffusion which are related to the degree of architectural and structural coherence within each voxel of the tissue. Fractional anisotropy （FA） was the most frequently used index of anisotropy.