Influence of posterior thoracic and lumbar titanium internal fixation system on magnetic resonance image
- Author:
Shi-Sheng HE
1
Author Information
1. Department of Orthopedics
- Publication Type:Journal Article
- From:
Academic Journal of Second Military Medical University
2006;27(11):1239-1241
- CountryChina
- Language:Chinese
-
Abstract:
Objective: To discuss the influence of posterior thoracic and lumbar titanium internal fixation system on magnetic resonance image (MRI). Methods: Twelve patients who received thoracic-lumbar posterior titanium internal fixation system were subjected to MRI scanning. The artifact characteristics of titanium internal fixator and its influence on the spinal canal structure were analyzed. Results: The artifact size was 2-3 times that of the internal fixator. The details in the spinal canal and spinal cord were clearly displayed on the sagittal T1 and T2 weighted images and axial T1 weighted image. The link rod had small artifact and had influence on the images of adjacent lamina and facet, but had little influence on the observations after operation. The pedicle screw in the right position had considerable artifact, which influenced the images of lateral spinal canal, foramina, nerve root, and posterolateral herniated disc. Conclusion: Turbo spin echo sequence should be chosen for MRI scanning in patients implanted with posterior thoracic and lumbar titanium internal fixation system, with the echo time minimized. When reading the MRI images, the influence of titanium fixation system on the postoperative MRI should be considered in order to obtain the correct information of the patients.
