Abstract
In 18 vertebral bodies with titanium fixation screws and in a phantom model, visualization of the vertebral body marrow was improved and susceptibility artifact was reduced on T1-weighted spin-echo magnetic resonance images when the direction of the frequency-encoding gradient was parallel to the long axis of the screw. A perpendicular direction improved image quality only when the region of interest was adjacent to the tip of the screw. In the phantom, the length of the screw was statistically significantly increased and the width and area were reduced (P < .001) when the gradient was parallel to the long axis of the screw.
Original language | English |
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Pages (from-to) | 268-272 |
Number of pages | 5 |
Journal | Radiology |
Volume | 204 |
Issue number | 1 |
DOIs | |
State | Published - Jul 1997 |
Externally published | Yes |
Keywords
- Magnetic resonance (MR), artifact
- Magnetic resonance (MR), comparative studies
- Magnetic resonance (MR), technology
- Spine, MR
- Spine, surgery