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.

• 正确植入的椎弓根螺钉伪影也较大，主要影响对邻近部位椎管侧方、椎间孔、脊神经和后外侧突出的椎间盘等结构的观察。