Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

PHTH 7303 Neuro > Exam 3 Imaging Intro, CT, & PET > Flashcards

Exam 3 Imaging Intro, CT, & PET Flashcards

1
Q

Anatomical purpose of imaging

A

Location of masses or lesions within CNS

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Functional purpose of imaging

A

Describe the location of brain activity associated with specific brain functions or dysfunction

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Limitations of functional neuroimaging

A
  1. Physical properties of the recording system
  2. Physiological constraints of the brain
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Only way meaning can be derived from images of brain activity

A

when acquired using the correct method and interpreted using the correct analyses

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Two constraint based on resolution

A

Spatial resolution Temporal resolution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is temporal resolution?

A

How close the timing between change in structure and behavior can be assessed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What is spatial resolution?

A

How accurate or specific can the neural structure or area associated with a behavior be located

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Anatomical versus Functional constraints of imaging

A
  • -Most techniques give insight into anatomical relationships but not function.
  • -In those cases Function has to be derived from anatomical relationships.
  • -Some techniques do function measures such as measures of metabolic activity within the brain
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Types of Imaging (9)

A
    1. Radiologic: Radiographs, Angiography, Computed Tomography (CT) scanning
    1. Positron Emission Tomography (PET scans)
    1. Single-photon emission computerized tomography (SPECT)
    1. Magnetic Resonance Imaging (MRI)
    1. Functional MRI (fMRI)
    1. Electroencephalography (EEG)
    1. Event related potentials (ERPs) & Evoked potentials (EPs)
    1. Magnetoencephalography (MEG)
    1. Near-infrared Spectroscopy
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Disadvantage using of radiograph for the head

A

Check skull only

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Advantages to using radiographs for skull (4)

A
  1. -Find fractures
  2. -Diseases that affect bones of the skull
  3. -Find a metallic foreign object stuck in the skull.
  4. -Check problems on a baby’s head, such as an odd shaped skull
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What is radiograph of skull being replaced by

A

CT scans

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

What’s so great about Cerebral Angiography?

A
  1. Images of the vessels of the brain using a contrast medium
  2. Allowing detection of abnormalities such as arteriovenous (AV) malformations, occlusions and aneurysms
  3. Fluoroscopic angiography used for placement of endovascular coils for the treatment of aneurysms
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

What sucks about Cerebral Angiography?

A

Replaced by computed tomographic (CT) angiography for general diagnostics

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What is Computed tomography (CT)? (3)

A
  1. -Computed Axial Tomography (CAT) scanning
  2. -Uses a series of x-rays of the head taken from many different directions
  3. -Typically used for quickly viewing brain injuries
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q
A
17
Q

Types of views seen in CT

A

Horizontal, sagittal & coronal views

18
Q

Advantages of the CT

A

Useful for evaluating

  • Abnormal structures (tumors)
  • Swelling from tissue damage in the brain
  • Bleeding
  • Assessment of ventricle size

Modern CT scanning can provide reasonable images in minutes

Example of brain bleed

19
Q

Another example of CT of brain bleed

A
20
Q

Disadvantages of CT

A

relatively poor anatomical location

21
Q
A

These structures are:

    1. Septum pellucidum
    1. Internal capsule (anterior limb)
    1. Longitudinal fissure
    1. Caudate nucleus
    1. Putamen
    1. Thalamus
    1. Temporal horn of the lateral ventricle
    1. Internal capsule (posterior limb)
22
Q

What is Computed tomography angiography (CTA)?

A

–Enhancement of blood vessels of brain with contrast medium with ability of viewing vessels from horizontal, sagittal and coronal views
–Allows for precise localization of vascular lesions
–Allows for 3-D reconstruction
–Allows for 4-D assessment of blood flow in the brain

23
Q

Comparison of CTA with standard angiography

(just pic to look at)

A
24
Q

Advantages of Computed tomography angiography (CTA)

A
  1. Multidimensional perspective
  2. enhanced detail with 3-D CTA where you can remove other brain tissue to enhance the vessels
  3. Spot the aneurysm
  4. Ability to rotate image with 3-D CTA
  5. Ability to do precise measurement with 3-D CTA
25
Q

My advice to you about this power point (CT ppt)

A

Difficulty getting all the pics in, probably want to pull up the power point so that it makes more sense.

26
Q

What is Positron Emission Tomography (PET)?

A
  • -Produces a 3-D image of sites of elevated metabolism in the brain
  • -Detects pairs of gamma rays emitted indirectly by a positron-emitting radionuclide (tracer), which is infused attached to fludeoxyglucose (FDG), a glucose analogue
    • Differences in brain activity can be assessed by differences in accumulation of FDG in different brain regions
27
Q

Tracers found in PET?

A

Specific radioligands for dopamine, serotonin & acetylcholine receptors & transporters for neurological and psychiatric disorder assessment

28
Q

What can PETs also detect?

A

Specific ligands for amyloid plaques – in vivo assessment in Alzheimer’s disease

PHTH 7303 Neuro (89 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions