[A short TE gradient-echo sequence using asymmetric sampling].
We have developed a gradient-echo pulse sequence with a short TE less than 4 msec using a data set of asymmetric off-center sampling with a broad bandwidth. The use of such a short TE significantly reduces T2* de-phasing effect even in a two-dimensional mode, and by collecting an off-center echo, motion-induced phase dispersion is also considerably decreased. High immunity of this sequence to these dephasing effects permits clear visualization of anatomical details near the skull base where large local field inhomogeneities and rapid blood flow such as in the internal carotid artery are present.
Fujita
N
N
Department of Radiology, Osaka University Medical School.
Harada
K
K
Sakurai
K
K
Nakanishi
K
K
Kim
S
S
Kozuka
T
T
D001921:Brain / Q000033:anatomy & histology*; D002343:Carotid Artery, Internal / Q000033:anatomy & histology; D006801:Humans; D008279:Magnetic Resonance Imaging / Q000379:methods*