Fast recovery 3D fast spin-echo MR imaging of the inner ear at 3 T.
High-resolution MR imaging of the inner ear with a heavily T2-weighted 3D fast spin-echo sequence has been performed successfully at 1.5 T. However, at 3 T, the longer T1 time of CSF necessitates a longer TR, resulting in significantly prolonged imaging times. In this study, the fast recovery 3D fast spin-echo sequence, which permits the TR to be reduced while maintaining T2 contrast, was optimized at 3 T for imaging of the inner ear. The optimized sequence parameters are as follows: 1500/294 (TR/TE); echo spacing, 18.1 ms; bandwidth, 38 kHz at 512 readout; and imaging time, 13 minutes.
Naganawa
Shinji
S
Department of Radiology, Nagoya University School of Medicine, 65 Tsurumai-cho, Shouwa-ku, Tokyo 466-8550, Japan.
Koshikawa
Tokiko
T
Fukatsu
Hiroshi
H
Ishigaki
Takeo
T
Aoki
Ikuo
I
Ninomiya
Ayako
A
D007758:Ear, Inner / Q000033:anatomy & histology*; D017352:Echo-Planar Imaging; D006801:Humans; D021621:Imaging, Three-Dimensional; D019047:Phantoms, Imaging; D012016:Reference Values; D013997:Time Factors