PURPOSE: To determine the normal pattern of cervical spinal cord motion with measurement of cervical spinal cord velocity by means of phase-contrast magnetic resonance (MR) imaging. MATERIALS AND METHODS: Spinal cord velocity was measured in 11 healthy subjects with a modified gradient-echo pulse sequence on a conventional 1.5-T MR imaging system that generated phase images sensitive to slow motion. Prospective electrocardiogram gating was used to assess velocity as a function of the cardiac cycle. The accuracy of velocity measurements was estimated with images of a phantom moving at constant velocity. RESULTS: The cervical spinal cord moves with an oscillatory pattern in the craniocaudal direction. The maximum velocity (7.0 mm/sec +/- 1.4 [standard deviation]) in the caudal direction occurred approximately 109 msec +/- 20 after electrical cardiac systole. The maximum velocities in subsequent oscillations decreased toward zero before the next cardiac systole. CONCLUSION: The cervical spinal cord oscillates in a craniocaudal direction after each cardiac systole.
PURPOSE: To determine the normal pattern of cervical spinal cord motion with measurement of cervical spinal cord velocity by means of phase-contrast magnetic resonance (MR) imaging. MATERIALS AND METHODS: Spinal cord velocity was measured in 11 healthy subjects with a modified gradient-echo pulse sequence on a conventional 1.5-T MR imaging system that generated phase images sensitive to slow motion. Prospective electrocardiogram gating was used to assess velocity as a function of the cardiac cycle. The accuracy of velocity measurements was estimated with images of a phantom moving at constant velocity. RESULTS: The cervical spinal cord moves with an oscillatory pattern in the craniocaudal direction. The maximum velocity (7.0 mm/sec +/- 1.4 [standard deviation]) in the caudal direction occurred approximately 109 msec +/- 20 after electrical cardiac systole. The maximum velocities in subsequent oscillations decreased toward zero before the next cardiac systole. CONCLUSION: The cervical spinal cord oscillates in a craniocaudal direction after each cardiac systole.
Authors: N Govers; J Béghin; J W M Van Goethem; J Michiels; L van den Hauwe; E Vandervliet; P M Parizel Journal: Neuroradiology Date: 2006-11-21 Impact factor: 2.804
Authors: Xiaodong Zhong; Craig H Meyer; David J Schlesinger; Jason P Sheehan; Frederick H Epstein; James M Larner; Stanley H Benedict; Paul W Read; Ke Sheng; Jing Cai Journal: Med Phys Date: 2009-08 Impact factor: 4.071
Authors: Andrew J Asman; Frederick W Bryan; Seth A Smith; Daniel S Reich; Bennett A Landman Journal: Med Image Anal Date: 2014-02-05 Impact factor: 8.545