Which CT system is capable of helical scanning? correct answers volume CT scanners
1. 3rd generation (960) detectors
2. 4th generation
3. EBCT - electronic beam CT
Which generation of CT scanner utilized a (360) degree rotation of the x-ray tube around the patient? correct answers 3rd generat...
CT Flashcards || QUESTIONS & ANSWERS 100%
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Which CT system is capable of helical scanning? correct answers volume CT scanners
1. 3rd generation (960) detectors
2. 4th generation
3. EBCT - electronic beam CT
Which generation of CT scanner utilized a (360) degree rotation of the x-ray tube around the
patient? correct answers 3rd generation scanner
Which generation of CT scanner utilizes a fixed ring of detectors? correct answers 4th
generation (4800) detectors
What are the advantages of CT over conventional imaging? correct answers 1. Anatomical
structures are visualized with no superimposition.
2. MPR - acquired data maybe reconstructed & viewed in alternate planes with no additional
radiation to the patient.
3. Measure Attenuation
4. Manipulation of attenuation data - tissue attenuation data collected by detectors may be
manipulated and measured by the computer.
What is the major advantage of helical CT over standard CT imaging? correct answers 1.
Allows a volume of tissue to be examined rather than individual slices only.
2. Shorter scan times.
3. Artifacts caused by patient motion are reduced.
What CT component controls slice thickness? correct answers postpatient collimation (per
new text--previously prepatient)
What specifically do the CT detectors measure? correct answers attenuation of the
transmitted x-ray beam
What condition would be contraindication to CCT? correct answers 1. sensitivity to iodine
(iondinated contrast)
2. prior contrast reactions
3. cardiac arrhythmias
4. renal failure
, What meningeal space contains cerebrospinal fluid? correct answers subarachnoid space
Which layer of the meninges is located close to the brain? correct answers pia mater
What is the name of the deep fissure that separates the two ceribral hemispheres? correct
answers Longitudinal fissure
What is the name of the white brain structure that connects the two cerebral hemispheres?
correct answers corpus callosum
A condition due to an abnormal amount of CSF in the ventricles is termed? correct answers
hydrocephalus
Where is the cerebrospinal fluid manufactured? correct answers choroid plexuses of lateral
ventricles--500 ml per day
Which aspect of the forebrain helps regulate pain, temperature, and touch? correct answers
thalamus
Which structure is also called hypophysis? correct answers pituitary gland
What are the structures of the brain stem? correct answers mid brain, pons, and medulla
Which structure connects the two hemispheres of the cerebellum? correct answers vermis
What structures of the brain are considered white brain matter? correct answers myelinated
axons - centrum semiovale & corpus callosum
(Grey Matter - dendrites & neuron cell body)
How many pairs of cranial nerves are found in the brain? correct answers 12 pairs
Most Important
1. olfactory nerve (smell)
2 optic nerve (vision)
5. trigeminal nerve (mixed sensory and motor)
10. vagus nerve (sensory and motor)
What is the name of the site where the optic nerve cross in the brain? correct answers optic
chiasma
About how long can the brain cells survive w/out oxygen? correct answers approx 4 min.
The majority of CCT scans require IV contrast. correct answers True
What are the components of the CT scan unit? correct answers 1. gantry( x-ray tube,
collimator assembly, detector array, prepatient & postpatient collimator)
2. patient couch/table
3. computer
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