Impact of computed tomography/magnetic resonance imaging registration on rehabilitation after percutaneous endoscopic decompression for lumbar stenosis: Retrospective study

Figure 1 Flowchart of computed tomography/magnetic resonance imaging registration. MRI: Magnetic resonance imaging; CT: Computed tomography; CMR: Computed tomography and magnetic resonance imaging registration.

Figure 2 Typical case 1. A: Magnetic resonance imaging and computed tomography images showing lumbar spine stenosis (L5/S1); B: Computed tomography (CT)/magnetic resonance imaging registration image showing compression of the S1 nerve by its ventral intervertebral disc; C: Based on the compression site, a working cannula was simulated on the three-dimensional CT reconstruction image; D: Endoscopic images showing complete release of the nerves and spinal cord, and photograph showing the extracted intervertebral disc tissue.

Figure 3 Typical case 2. A: Magnetic resonance imaging and computed tomography images showing lumbar spine stenosis (L4/5); B: Computed tomography (CT)/magnetic resonance imaging registration image showing that the compression of the L5 nerve arose from the superior articular process and ventral intervertebral disc; C: Based on the compression site, a working cannula was simulated on the three-dimensional CT reconstruction image; D: Endoscopic images showing complete release of the nerves and spinal cord, and photograph showing the removed intervertebral disc and superior articular process.