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145 Final > Ct Test > Flashcards

Ct Test Flashcards

1
Q

What is the name of the tapered, terminal part of the spinal cord?

A

Conus medullaris

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2
Q

Which meningeal space contains cerebrospinal fluid (CSF)?

A

Subarachnoid space

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3
Q

Which layer of the meninges is located closest to the brain?

A

Pia mater

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4
Q

The two divisions of the central nervous system include the brain and

A

spinal cord

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5
Q

Another term for the insula is the

A

central lobe

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6
Q

What is the name of the white brain structure that connects the two cerebral hemispheres?

A

Corpus callosum

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7
Q

What is the name of the deep fissure that separates the two cerebral hemispheres?

A

Longitudinal fissure

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8
Q

Which of the following structures is attached to the roof of the third ventricle?

A

Pineal gland

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9
Q

A condition caused by an abnormal amount of CSF in the ventricles is termed

A

hydrocephalus

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10
Q

Which aspect of the forebrain serves as an interpretation center for pain, temperature, and touch?

A

Thalamus

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11
Q

Which of the following structures is not part of the brainstem?

A

Cerebellum

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12
Q

Which structure connects the two hemispheres of the cerebellum?

A

Vermis

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13
Q

Major functions of the cerebellum include

A

coordination, posture, and balance.

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14
Q

How many pairs of cranial nerves are found in the brain?

A

12

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15
Q

Which of the following is not a major cranial nerve?

A

Sensory

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16
Q

What is the name of the site where some optic nerve fibers cross in the brain?

A

Optic chiasma

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17
Q

Visual centers in the brain are located in the ____ lobe of the cerebrum.

A

occipital

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18
Q

Hemianopia is a condition defined as

A

blindness occurring in half of the visual field in each eye.

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19
Q

Which of the following statements is NOT an advantage of CT (computed tomography) over conventional imaging?

A

Exposes the patient to less radiation

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20
Q

Which generation of CT scanner first used a fixed ring of detectors?

A

Fourth

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21
Q

T/F Artifacts caused by patient motion are reduced with volume CT scanning as compared with earlier generation scanners.

A

True

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22
Q

The capability to create accurate reconstruction of patient data into alternative planes (coronal, sagittal, three-dimensional) is termed

A

multiplanar reconstruction.

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23
Q

What is the major advantage of volume CT over standard CT imaging?

A

Allows a volume of tissue to be examined rather than individual slices only

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24
Q

Which of the following is NOT an advantage of a multislice CT scanner?

A

Reduces patient dose

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25
T/F Current multislice CT scanners can acquire up to 320 slices per x-ray tube rotation. Some newer machines, even more
True
26
T/F Multislice CT is not recommended for abdomen studies.
False
27
What controls the actual slice thickness on multislice CT scanners?
Size of the detector row used
28
What specifically do the CT detectors measure?
Attenuation
29
What controls the displayed image contrast?
window width
30
The three-dimensional volume of tissue in a slice is called a
voxel
31
What controls the displayed image brightness?
window level
32
Which medium serves as the baseline for CT numbers?
Water
33
The ratio between the relationship between table speed and slice thickness defines
pitch
34
Calculate pitch when the couch movement is 10 mm/second and slice thickness per 360° rotation of 20 mm?
0.5:1
35
Which of the following pitch ratios is considered to be oversampling?
0.5:1
36
Muscular structures seen on a CT image would appear:
gray
37
Which of the following pathologic indications would NOT apply to head CT?
Multiple sclerosis
38
Which of the following conditions may be a contraindication for head CT?
Sensitivity to iodinated contrast media
39
Approximately ____ of all head CTs generally require intravenous contrast media.
50% to 90%
40
Oxygen deprivation to the brain for ________ minutes can lead to permanent brain cell injury.
4
41
Which of the below does NOT cross the blood brain barrier
all of these can cross the blood brain barrier
42
A collection of blood accumulating under the dura mater caused by trauma is termed
subdural hematoma
43
Hydrocephalus is caused by
blockage of the drainage of CSF.
44
Which window widths are CT head scans viewed?
Soft-tissue window Bony window Both A and B
45
Which one of the following pathologic indications for a head CT is directly related to trauma?
Subdural hematoma
46
A CT colonography requires the use of ________ as a contrast medium.
air
47
How long is the catheter left in place following a percutaneous abscess drainage (PAD) procedure?
24 to 48 hours
48
Volume acquisition CT slices cannot be reformatted as 3-D images.
False
49
T/F CT angiography (CTA) does not require the use of intravenous contrast media to demonstrate vascular structures.
False
50
Prospective electrocardiogram (ECG) gating used during cardiac CT permits the heart to be scanned
during the diastole cycle.
51
A predetermined procedure is the definition for
protocol
52
Another term for topogram is
scanogram
53
____ controls the brightness of an image within a certain range
Window level
54
A technique used to view vessels demonstrated in CTA is termed:
maximum intensity projection
55
The common lumbar puncture site is located at the vertebra level of
L3-4.
56
Along with the posterior pituitary gland and the infundibulum, what other structure or region is associated with the hypothalamus?
Optic chiasm
57
Which of the following structures filters the blood to produce CSF?
Choroid plexus
58
What is the name for the enlarged regions of the subarachnoid space?
Cisterns
59
Typical slice thickness for a spine CT range is usually no greater than _____ mm.
3
60
What is an example an ideal and equal pitch?
1:1
61
To compensate for the potential increased dose in CT, manufacturers have incorporated technology called
dose modulation

145 Final (6 decks)

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