No time to relax! Inhomogenity of white matter is normal in T2-weighted brain images at 3T
C Mathys, H Wittsack, AS Ringelstein, U Mödder, A Saleh · RöFo - Fortschritte auf dem Gebiet der Röntgenstrahlen und der bildgebenden Verfahren · 2008 · Heft 04
Bibliografische Angaben
Zusammenfassung
Summary: 1) Regional T2 relaxation time differs physiologically in human white brain matter, especially at high field intensities. 2) The consequential influence on the brain-to-lesion contrast has to be taken into account when suspecting pathology. 3) The signal of T2W is influenced by T2 and T1 relaxation times, spin density, diffusion and flow artefacts. Introduction: 1) Relevance of tissue contrast for diagnosing pathology. 2) Composition of the signal of T2W (T1+T2 time, spin density etc). 3) Changes of contrast and relaxation times at high field intensities. Materials and Methods: T2-Relaxometry of white a…