Myelography is an invasive test that combines fluoroscopy and radiography to evaluate which space?

Myelography is an invasive test that combines fluoroscopy and radiography to evaluate which space?

• A. Spinal subarachnoid space
• B. Cranial ventricles
• C. Joint spaces
• D. Intra-articular space

Answer: (A)

The key idea is that myelography images the spinal subarachnoid space. In this procedure, a radiopaque contrast is injected into the thecal sac and then fluoroscopy guides and radiographs capture the flow of contrast within the spinal canal. This outlines the subarachnoid space where cerebrospinal fluid and nerve roots reside, allowing visualization of compression, herniation, disc disease, tumors, or other space-occupying issues around the spinal cord. The cranial ventricles are part of the brain’s ventricular system and are studied with ventriculography or cisternography, not myelography. Joint spaces are evaluated with arthrography, where contrast is introduced into a joint. So, myelography targets the spinal subarachnoid space.

The key idea is that myelography images the spinal subarachnoid space. In this procedure, a radiopaque contrast is injected into the thecal sac and then fluoroscopy guides and radiographs capture the flow of contrast within the spinal canal. This outlines the subarachnoid space where cerebrospinal fluid and nerve roots reside, allowing visualization of compression, herniation, disc disease, tumors, or other space-occupying issues around the spinal cord. The cranial ventricles are part of the brain’s ventricular system and are studied with ventriculography or cisternography, not myelography. Joint spaces are evaluated with arthrography, where contrast is introduced into a joint. So, myelography targets the spinal subarachnoid space.