Magnetic resonance imaging (MRI):
A)can scan the brain only at specific angles.
B)should not be used repeatedly on the same individual.
C)does not require exposing the patient to any radiation.
D)provides less-detailed images of the brain compared to other technologies.
June will soon undergo a magnetic resonance imaging (MRI)scan.Which of the following will most likely occur during the scan?
A)Narrow X-ray beams will pass through June's head, and the amount of radiation absorbed by each beam will be measured.
B)A radioactive isotope will be injected into June's brain in order to show the different levels of activity in specific areas of her brain.
C)Several images will be presented to June, which she will have to reconstruct with a pencil and paper.
D)A magnetic field will realign the hydrogen atoms in June's brain, allowing the computer to read the signals and construct images of her brain.
Which of the following brain-imaging techniques is considered the most effective?
A)Computerized tomography (CT)
B)Single photon emission computed tomography (SPECT)
C)Magnetic resonance imaging (MRI)
D)Positron-emission tomography (PET)
________ tests are used to detect changes in the brain and nervous system that reflect emotional and psychological changes.These tests are alternative methods to magnetic resonance imaging (MRIs), computerized tomography (CT), positron-emission tomography (PET), and single photon emission computed tomography (SPECT).