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A CT scan of your brain showed the cavities with spinal fluid.

A CT scan involves sending X-ray beams through the body. Measurements are then taken to see how much of these beams are getting to the other side of the body. A computer then converts the measurements into images of the inside of the body.

There are cavities with cerebrospinal fluid in the brain, around the brain and around the spinal cord. Among other things, the cerebrospinal fluid cushions the brain and spinal cord during knocks and also nourishes the brain cells.

The CT scan involved adding a contrast agent to the spinal fluid. A contrast agent is a fluid. This fluid ensures that certain tissue is more visible in the images.

The contrast agent aims to show the size and shape of the cavities for the spinal fluid with particular accuracy. The contrast agent should also show whether the spinal fluid is spreading normally across the various cavities.