Which neurologic diagnostic test gives a visualized horizontal and vertical cross-section of the brain at any axis?
a. Nuclear brain scan
b. Echoencephalography
c. CT scan
d. Magnetic resonance imaging (MRI)
ANS: C
A CT scan provides a visualization of the horizontal and vertical cross-sections of the brain at any axis. A nuclear brain scan uses a radioisotope that accumulates where the blood-brain barrier is defective. Echoencephalography identifies shifts in midline structures of the brain as a result of intracranial lesions. MRI permits visualization of morphologic features of target structures and permits tissue discrimination that is unavailable with any other techniques.
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