RT Journal Article
SR Electronic
T1 Applicability and Advantages of Flow artifact–insensitive Fluid-attenuated Inversion-recovery MR Sequences for Imaging the Posterior Fossa
JF American Journal of Neuroradiology
JO Am. J. Neuroradiol.
FD American Society of Neuroradiology
SP 1095
OP 1098
VO 21
IS 6
A1 Tanaka, Norimitsu
A1 Abe, Toshi
A1 Kojima, Kazuyuki
A1 Nishimura, Hiroshi
A1 Hayabuchi, Naofumi
YR 2000
UL http://www.ajnr.org/content/21/6/1095.abstract
AB Summary: We describe a new sequence, flow artifact–insensitive fluid-attenuated inversion recovery (FAIS-FLAIR), that capitalizes on the advantages of fluid-attenuated inversion recovery (FLAIR) while minimizing FLAIR-related artifacts such as those often encountered in the posterior fossa. Twenty-eight patients with posterior fossa disease underwent FAIS-FLAIR, conventional FLAIR, and spin-echo MR studies, and the findings yielded by the three techniques were compared. In this patient population, postcontrast FAIS-FLAIR imaging was obtained in 20 patients and compared with postcontrast T1-weighted images. The images were assessed for lesion conspicuity by three radiologists. FAIS-FLAIR markedly reduces the inflow artifacts from noninverted CSF on FLAIR images. It does so with and without contrast agent administration, and produces higher lesion conspicuity compared with T1- and T2-weighted spin-echo sequences and conventional FLAIR images of the posterior fossa.