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Patho 2 quiz 2 > Neuro Imaging > Flashcards

Neuro Imaging Flashcards

1
Q

CT/ CAT scans accepted imaging for what?

A

imaging modality for evaluation of the entire body

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2
Q

CT/ CAT scan uses?

A

Thousands of narrow beam x rays that pass at different angles

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3
Q

CT/ CAT scan looks at?

A

Structures rather than functions

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4
Q

Attenuated data is summed up from thousands of angles used in a process called

A

reconstruction

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5
Q

Can small structures be seen in CT/CAT?

A

nope

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6
Q

what is used to detect brain diseases

A

CT/ CAT Scan

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7
Q

contrast dye can be used in CT/CAT scans for?

A

detect organs

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8
Q

On CT/CAT scan Bones are

A

white

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9
Q

On CT/CAT scan gases and liquids are?

A

black

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10
Q

On CT/CAT scan tissues are?

A

gray

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11
Q

Tomographic image ?

A

picture of a slab of the pt’s anatomy

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12
Q

what does MRI stand for

A

Magnetic Resonance Imaging

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13
Q

MRI magnetic field is ________ times as strong as earth’s magnetic fields

A

60,000x

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14
Q

Atom that MRI uses?

A

hydrogen

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15
Q

What is the resonance bit for MRI

A

Nuceli are hit by pulsing radio waves, this RF makes the protons spin at a particular frequency, in a particular direction

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16
Q

MRI diagnosing

A

MS, Stroke, infections of the brain/ spine/ CNS, Tendonitis

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17
Q

MRI visualizing

A

Injuries, torn ligaments

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18
Q

MRI evaluating

A

Masses in soft tissues, cysts, bone tumors or disc problems

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19
Q

Advantages of MRI

A
  • Does not use Ionizong radiation
  • Contrast dye has low chance of side effects
  • Non invasive
  • Provides comparable resolution with far better contrast resolution (ability to distinguish the differences between two arbitrarily similar but not identical tissues)
20
Q

Contraindications of MRI

A
  • Pacemaker

- Metal objects in body

21
Q

Top two MRI images

A

T1WI & T2WI

22
Q

T1WI detects water and fluid containing tissues as

A

DARK

23
Q

T1WI detects fat containing tissues as

A

Bright

24
Q

T2WI detects water & fluid containing tissues as

A

Bright

25
Q

T2WI detects fat containing tissues as

A

DARK

26
Q

T1WI are used more for

A

Fluid, swelling, blood

27
Q

T2WI are good at finding

A

Pathology

28
Q

what does MRA stand for ?

A

Magnetic Resonance Angiography

29
Q

What are MRA used for?

A
  • images blood vessels

- stenosis & aneurysms

30
Q

fMRI is done when?

A

while pt performs a task

31
Q

fMRI is

A

functional

32
Q

fMRI displays

A

Metabolically active tissue,

33
Q

fMRI utilizes oxygen uptake as a measure of

A

brain activity

34
Q

Strengths of fMRI

A
  • Non-invasive, replicable
  • Potentially good spatial localization
  • Common, well-validated technique
35
Q

Limitations of fMRI

A
  • Mediocre temporal resolution (seconds)
  • Complex, highly variable data analyses
  • Expensive and time-consuming
36
Q

what detects electrical activity in the brain?

A

EEG

37
Q

What diagnosing EPILEPSY

A

EEG

38
Q

What is used to diagnose sleeping disorders

A

EEG

39
Q

what 3 ares does EEG help identify intervention

A
  • lobectomy
  • Cortical excision
  • Hemispherectomy
40
Q

Lobectomy

A

removes part of the lobe of a brain (temporal)

41
Q

Cortical excision

A

removes outer layer of the cortex

42
Q

hemispherectomy

A

remove outer layer and anterior temporal lobe on one half of the brain

43
Q

What injects Tracers?

A

PET scan

44
Q

PET scans detects

A

Glucose metabolism, cancer, dementia, seizures, map brain function

45
Q

Strengths of PET scan

A
  • Uses a simple physiological mechanism
  • Provides absolute, quantitative data
  • Allows imaging of anything that can be tagged
46
Q

Limitations of PET Scan

A
  • Poor temporal resolution (many minutes)
  • Poor spatial resolution (several centimeters)
  • Requires injection of radioactive material

Patho 2 quiz 2 (2 decks)

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