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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
Q

T/F Current multislice CT scanners can acquire up to 320 slices per x-ray tube rotation. Some newer machines, even more

A

True

26
Q

T/F Multislice CT is not recommended for abdomen studies.

A

False

27
Q

What controls the actual slice thickness on multislice CT scanners?

A

Size of the detector row used

28
Q

What specifically do the CT detectors measure?

A

Attenuation

29
Q

What controls the displayed image contrast?

A

window width

30
Q

The three-dimensional volume of tissue in a slice is called a

A

voxel

31
Q

What controls the displayed image brightness?

A

window level

32
Q

Which medium serves as the baseline for CT numbers?

A

Water

33
Q

The ratio between the relationship between table speed and slice thickness defines

A

pitch

34
Q

Calculate pitch when the couch movement is 10 mm/second and slice thickness per 360° rotation of 20 mm?

A

0.5:1

35
Q

Which of the following pitch ratios is considered to be oversampling?

A

0.5:1

36
Q

Muscular structures seen on a CT image would appear:

A

gray

37
Q

Which of the following pathologic indications would NOT apply to head CT?

A

Multiple sclerosis

38
Q

Which of the following conditions may be a contraindication for head CT?

A

Sensitivity to iodinated contrast media

39
Q

Approximately ____ of all head CTs generally require intravenous contrast media.

A

50% to 90%

40
Q

Oxygen deprivation to the brain for ________ minutes can lead to permanent brain cell injury.

A

4

41
Q

Which of the below does NOT cross the blood brain barrier

A

all of these can cross the blood brain barrier

42
Q

A collection of blood accumulating under the dura mater caused by trauma is termed

A

subdural hematoma

43
Q

Hydrocephalus is caused by

A

blockage of the drainage of CSF.

44
Q

Which window widths are CT head scans viewed?

A

Soft-tissue window

Bony window

Both A and B

45
Q

Which one of the following pathologic indications for a head CT is directly related to trauma?

A

Subdural hematoma

46
Q

A CT colonography requires the use of ________ as a contrast medium.

A

air

47
Q

How long is the catheter left in place following a percutaneous abscess drainage (PAD) procedure?

A

24 to 48 hours

48
Q

Volume acquisition CT slices cannot be reformatted as 3-D images.

A

False

49
Q

T/F CT angiography (CTA) does not require the use of intravenous contrast media to demonstrate vascular structures.

A

False

50
Q

Prospective electrocardiogram (ECG) gating used during cardiac CT permits the heart to be scanned

A

during the diastole cycle.

51
Q

A predetermined procedure is the definition for

A

protocol

52
Q

Another term for topogram is

A

scanogram

53
Q

____ controls the brightness of an image within a certain range

A

Window level

54
Q

A technique used to view vessels demonstrated in CTA is termed:

A

maximum intensity projection

55
Q

The common lumbar puncture site is located at the vertebra level of

A

L3-4.

56
Q

Along with the posterior pituitary gland and the infundibulum, what other structure or region is associated with the hypothalamus?

A

Optic chiasm

57
Q

Which of the following structures filters the blood to produce CSF?

A

Choroid plexus

58
Q

What is the name for the enlarged regions of the subarachnoid space?

A

Cisterns

59
Q

Typical slice thickness for a spine CT range is usually no greater than _____ mm.

A

3

60
Q

What is an example an ideal and equal pitch?

A

1:1

61
Q

To compensate for the potential increased dose in CT, manufacturers have incorporated technology called

A

dose modulation

145 Final (6 decks)

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