Neuro imaging pt. 2 Flashcards
cerebral angiography examines what
blood vessels in the brain
purpose of cerebral angiography
used to assess blood vessels, circulation of brain structures, signal stenosis, location of occlusions, demos quality of circulation
cerebral angiography used to identify
aneurysms
atherosclerosis/stenosis
AV malformations
arterial dissections
a lack of blood
CT angiogram
need to use contrast
short amount of time - only few mins
what can CT angiogram lead to
catheter angio for treatment
femoral sheath placement
whats contraindicated if u have a femoral sheath placement
hip flex >90
incisional clearance for activity after removal
MR angiogram
may or may not need contrast
longer amount of time - 20-30 min
same contraindications as MRI
trans-cranial doppler
using non-invasive ultrasound, cranial blood vessels are assessed for cerebral blood flow velocity
isonation windows for transtemporal
terminal IC, MCA, ACA, PCA
isonation window for transforaminal
VA, BA
trans-cranial doppler used to identify what
vasospams
PT contraindicated for what and depending on what
vasospams
depends on: severity, symptoms present
brain fMRI
measures small changes in blood flow within the brain during brain activity
fMRI used for
identifying eloquent cortex - directly controls function, uses paradigms, pt must be able to follow commands
pre-surgical brain mapping for tumor resection
PET scan
looks at metabolic activity at the molecular level in the brain
images relay what in a PET scan
detection and quantification of tracers located in the brain
images of a PET scan are combined with what
CT or MRI images to correlate anatomy and function
SPECT imaging looks at what
metabolic activity at the molecular level in the brain in a 3-D manner
tracers are what in a SPECT
injected into the brain and cross BBB
tracers are what in a PET scan
injected into the blood and absorbed by specific tissues
