PT  - JOURNAL ARTICLE
AU  - Daniels, D L
AU  - Kneeland, J B
AU  - Shimakawa, A
AU  - Pojunas, K W
AU  - Schenck, J F
AU  - Hart, H
AU  - Foster, T
AU  - Williams, A L
AU  - Haughton, V M
TI  - MR imaging of the optic nerve and sheath: correcting the chemical shift misregistration effect.
DP  - 1986 Mar 01
TA  - American Journal of Neuroradiology
PG  - 249--253
VI  - 7
IP  - 2
4099  - http://www.ajnr.org/content/7/2/249.short
4100  - http://www.ajnr.org/content/7/2/249.full
SO  - Am. J. Neuroradiol.1986 Mar 01; 7
AB  - The interface between soft-tissue structures and adipose tissue may be obscured by the chemical shift misregistration effect on MR images. In the orbit, this effect occurs at the edges at the optic nerve, even on high-resolution local coil images. In both phantom and clinical studies with a 1.5 T local coil imaging system, it was found that the chemical shift misregistration effect can be minimized by positioning the patient so that the optic nerve is parallel to the frequency encoding gradient. Alternatively, the effect can be corrected by using a computer program to combine "lipid" and "water" proton images. The sensitivity of MR for optic nerve lesions should be improved by these technical modifications.