A patient with a long history of hypertension and diabetes now develops confusion. The health care provider wants to make a differential diagnosis between Alzheimer's disease and multiple infarcts. Which diagnostic procedure should the nurse expect to prepare the patient for first?
a. Skull x-rays
b. Computed tomography (CT) scan
c. Positron-emission tomography (PET)
d. Single-photon emission computed tomography (SPECT)
Answer: B