Advanced

AJNR - American Journal of Neuroradiology

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via CrossRef Citing Articles via Google Scholar Google Scholar Articles by Naganawa, S. Articles by Ishigaki, T. Search for Related Content PubMed PubMed Citation Articles by Naganawa, S. Articles by Ishigaki, T.

American Journal of Neuroradiology 20:1143-1147 (6 1999)
© 1999 American Society of Neuroradiology

ARTICLE

High-Resolution MR Cisternography of the Cerebellopontine Angle, Obtained with a Three-Dimensional Fast Asymmetric Spin-Echo Sequencein a 0.35-T Open MR Imaging Unit

Shinji Naganawa^,a, Tokiko Ito^a, Eriko Iwayama^a, Hiroshi Fukatsu^a and Takeo Ishigaki^a

^a From the Department of Radiology, Nagoya University School of Medicine, Nagoya, Japan.

Summary: High-resolution MR cisternography performed with 3D fast asymmetric spin-echo imaging (3D fast spin-echo with an ultra-long echo train length and asymmetric Fourier imaging) was optimized in a 0.35-T open MR imaging unit. The 0.35- and 1.5-T images of the two volunteers and three patients with acoustic schwannomas were then compared. The optimal parameters for images obtained by 3D fast asymmetric spin-echo imaging at 0.35 T were as follows: field of view, 15 cm; matrix, 256 x 256 x 40; section thickness, 1 mm; echo train length, 76; and imaging time, 10 minutes 44 seconds. Scans obtained from both normal volunteers showed the facial, cochlear, and superior and inferior vestibular nerves separately in the internal auditory canal on both 0.35- and 1.5-T images. All three acoustic schwannomas were depicted on both 0.35- and 1.5-T images. Screening for disease at the cerebellopontine angle and in the internal auditory canal, without the administration of contrast material on a low-field open MR imaging unit and within a clinically acceptable imaging time, may be possible. Further controlled prospective studies are required, however, before implementation on a wide basis. If proved effective, this may be of particular value for reducing healthcare costs and for imaging claustrophobic and pediatric patients in an open system.

This article has been cited by other articles:

				H. R. Harnsberger and C. Shelton Mass Screening for Retrocochlear Disorders AJNR Am. J. Neuroradiol., June 1, 2002; 23(6): 897 - 898. [Full Text] [PDF]

				S. Naganawa, T. Koshikawa, H. Fukatsu, T. Ishigaki, and T. Fukuta MR Cisternography of the Cerebellopontine Angle: Comparison of Three-dimensional Fast Asymmetrical Spin-echo and Three-dimensional Constructive Interference in the Steady-state Sequences AJNR Am. J. Neuroradiol., June 1, 2001; 22(6): 1179 - 1185. [Abstract] [Full Text] [PDF]