Clinical Science Practice Test 8

1. fMRI is mostly used for research than diagnosis.

True

False

2. In a transverse section of the CT of the brain, a ring of the cranium is seen which is absent or not so prominent in MRI. What is this reason?

The cranium is negated out while imaging

MRI images soft tissues so it does not image the cranium properly. Thus, the cranial ring is more prominent in CT than in MRI

Cranial ring is made of bones which do not have water, so it cannot give an MRI

The EM waves received by MRI does not have sufficient magnetic strength to view the bones

3. The cooling agent for the MRI magnet is _______

Argon

Helium

Neon

Xenon

4. In the cardiovascular system, which is more affected by the radiations?

Capillaries

Vein

Cardiac Muscles

Artery

5. In a brain scan of a person suffering/suspected of suffering from schizophrenia, the brain _______

has gray matter which more than normal

has shrunk

has white matter which more than normal

is of a size bigger than normal

6. CAT scan can be performed even without a dye.

False

True

7. CAT scan is essentially _________

x-ray of brain

a finer X-ray of bones

a detailed x-ray

x-ray of soft tissues

8. Which of the following pair of scattering is important for diagnostic purposes?

Compton and Photoelectric

Pair Production and Disintegration

Coherent and Compton

Photoelectric and Pair Production

9. The radiodensity or the radiopacity is measured in _________

g/m³

10. The underlying principle of fMRI is that ___________

cerebral blood flow and neuronal activity are not connected

cerebral blood flow and neuronal activity are connected

certain parts of the brain receive more blood

certain parts of the brain are more active than other parts