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Abstract

MR assessment of the normal position of the spinal cord in the spinal canal.

J Holsheimer, J A den Boer, J J Struijk and A R Rozeboom
American Journal of Neuroradiology May 1994, 15 (5) 951-959;
J Holsheimer
Institute for Biomedical Technology, University of Twente, Enschede, The Netherlands.
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J A den Boer
Institute for Biomedical Technology, University of Twente, Enschede, The Netherlands.
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J J Struijk
Institute for Biomedical Technology, University of Twente, Enschede, The Netherlands.
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A R Rozeboom
Institute for Biomedical Technology, University of Twente, Enschede, The Netherlands.
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Abstract

PURPOSE To investigate intradural geometry, which strongly influences the effects of epidural spinal cord stimulation.

METHODS Axial MR images with turbo spin-echo were made of 26 healthy subjects at C-4 through C-6, T-5 and T-6, and T-11 and T-12, at T-11 and T-12 both in the supine and the prone position. Measurements were made of the dorsomedial and the ventromedial cerebrospinal fluid layer and the anteroposterior and transverse sizes of both the spinal cord and the dural sac. The samples of all variables were analyzed statistically. The distance between spinal and vertebral midline was also determined.

RESULTS The dorsal cerebrospinal fluid layer was 1.5 to 4.0 mm at C-4 through C-6 and 4.0 to 8.5 mm at T-5 and T-6. At T-11 it was 2.0 to 6.0 mm in the supine position and was increased by approximately 2.2 mm in the prone position. At T-12 these values were 1.5 to 4.5 mm and approximately 3.4 mm, respectively. Differences between the spinal and vertebral midline up to 1.5 to 2.0 mm occurred in approximately 40% of the images.

CONCLUSIONS Because there are variations of the dorsal cerebrospinal fluid layer among subjects by more than a factor of 2, and significant variations of the mediolateral position of the spinal cord, information on these parameters in patients will be essential for the optimal application of epidural spinal cord stimulation.

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American Journal of Neuroradiology
Vol. 15, Issue 5
1 May 1994
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MR assessment of the normal position of the spinal cord in the spinal canal.
J Holsheimer, J A den Boer, J J Struijk, A R Rozeboom
American Journal of Neuroradiology May 1994, 15 (5) 951-959;

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MR assessment of the normal position of the spinal cord in the spinal canal.
J Holsheimer, J A den Boer, J J Struijk, A R Rozeboom
American Journal of Neuroradiology May 1994, 15 (5) 951-959;
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