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ÀÌ°ü¼º/Kwan Sung Lee ¹ÚÃá±Ù/ÃÖ½ÂÁø/ÀÌ»ó¿ø/¹Ú¼ºÂù/Áöö/Á¶°æ¼®/°­Áرâ/¹Ú¿µÇÏ/Choon Keun Park/Seung-Jin Choi/Sang Won Lee/Sung Chan Park/Chul Ji/Kyung Suk Cho/Joon Ki Kang/Yung Ha Park

Abstract

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#ÃÊ·Ï#
Over the past six years, titanium alloy has been replacing the stainless steel in spinal
implants owing to its magnetic resonance imaging(MRI) compatibility, However, studies
about the usefulness of MRI, from a clinical standpoint, when it is used for spinal
implants have been scarce. The purpose, therefore, is to determine whether postoperative
MRIs would provide satisfactory information in evaluating the spine having various
titanium implants.
Authors reviewed the spinal MR images of sixteen patients who had previously
received eleven different kinds of titanium implants, and compared postoperative images
to preoperative images regarding the quality of image of spinal cord, nerve root, spinal
canal, and the a aforementioned implants. Types of implants included anterior cervical
plate/screws, lateral cervical mass plate/screws. Halifax interlaminar clamps, anterior
thoracolumbar rods/screws, posterior thoracolumar rods/hooks, and posterior thoracolumar
transpeidcular rods/screws.
Anterior cervical plate/screws, lateral cervical mass plate/screws. Halifax clamps, and
anterior thoracolumbar rod/screws produced small distortions of the images at the spinal
canal or neural foramen. In contrast, posterior thoracolumbar transpedicular rods/screws
created severe image distortions at the neural foramen in the postoperative MRIs.
Metal-induced artifacts were most marked in the image from gradient echo sequence.
Posterior thoracolumbar rods/hooks producted some artifacts at the posterior portion of
the spinal canal.
Although our series are limited in number, it can be concluded that MRI is
informative and it is useful in postoperative evaluation of the spine with most types of
titanium implants. However, postmyelogram computed tomography is recommended in
cases where posterior thoracolumbar transpedicular rods/screws have been used.

Å°¿öµå

Titanium implants; Magnetic resonance image; Spine; Artifacts.;

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