The process of using ultrasound to determine the presence of a centrally located mass in the brain is called:
A) computed tomography.
B) echoencephalography.
C) electroencephalography.
D) myelogram.
B
Explanation: A) Computed tomography produces three-dimensional x-ray images.
B) Correct.
C) Electroencephalography measures the electrical activity of the brain.
D) A myelogram is an x-ray of the spinal canal.
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