Final answer:
A radiograph of the spinal cord is called a C) myelogram, which is a diagnostic procedure using a contrast dye to enhance imaging of the spinal cord and surrounding structures.
Step-by-step explanation:
A radiograph of the spinal cord is known as a myelogram. During a myelogram, a contrast dye is injected into the spinal canal to enhance imaging, and this allows healthcare providers to view the structure of the spinal cord, the spinal canal, and the nerve roots exiting the spinal cord.
This procedure is particularly useful for diagnosing spinal cord injuries, tumors, or infections that may compress the spinal cord or nerve roots.