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FIG 5. Right C7 radiculopathy evaluated with cervical postmyelography CT axial images at 1.5-mm thickness at same level in standard (A) and swimmer’s (B) position. A, Beam hardening produces linear areas of decreased attenuation in the right foramen, contrast-opacified CSF and spinal cord, and linear variable attenuation in the left foramen and soft tissues compared with swimmer’s CT (B) B, Swimmer’s CT demonstrates distinct uniform soft-tissue attenuation representing formamenal disk herniation (surgically confirmed) in the right foramen (arrows) while also better demonstrating normal uniform fat attenuation surrounding the nerve root sleeve in the normal left foramen.
