Bronskill M J, McVeigh E R, Kucharczyk W, Henkelman R M
Department of Medical Biophysics, University of Toronto, Ontario, Canada.
Radiology. 1988 Feb;166(2):485-8. doi: 10.1148/radiology.166.2.3336725.
Magnetic resonance (MR) imaging of the spinal cord frequently demonstrates, especially on sagittal sections, a central stripe that mimics a true syrinx. This syrinx-like manifestation of a truncation artifact occurs in objects having a width of only a few pixels and was demonstrated by calculations verified with phantom MR images. Healthy volunteers and two patients with a syrinx and cervical spondylosis, respectively, underwent MR imaging. By increasing the number of phase-encoding steps, decreasing the field of view, and switching phase- and frequency-encoding axes, the syrinx-like artifact can be eliminated.
脊髓的磁共振（MR）成像经常显示出，尤其是在矢状面上，一条类似真正空洞的中央条纹。这种截断伪影的空洞样表现出现在宽度仅为几个像素的物体中，并通过用MR体模图像验证的计算得以证实。分别对健康志愿者以及两名患有空洞和颈椎病的患者进行了MR成像。通过增加相位编码步数、减小视野以及切换相位和频率编码轴，可以消除这种空洞样伪影。
