Neuro Imaging Flashcards
Describe the new model of brain fxn:
Brain functions are primarily INTRINSIC, with processing derived from subtle perturbation of high level intrinsic neuronal activity (both awake and asleep!);
coordinated within multiple networks defined by connectivity and fxn
Three types of slices common to imaging of the CNS are:
Sagittal
Coronal
Horizontal (transverse)
when undergoing Computed Tomography (CT), Magnetic Resonance Imaging (MRI) or Positron Emission Tomography (PET), the person is in what position?
lying supine
Look at the ________ if available to identify the position of the head in relation to the cuts.
Scanogram
PNS:
Cranial Nerves
Brachial Plexus
Lumbosacral Plexus
CNS:
Brain
Spinal cord
Cervical
Thoracic
LumbosacralNeuro-imaging structural capabilities:
Size & shape
Tissue characteristics
Histology
Chemical structure
Neuro-imaging functional capabilities:
Cell homeostasis
Neuronal activity
Which is better for acute imagining of the brain?
CT
Adv: faster, less time for position
Disadv: radiation
What are the neuro imaging modalities?
(* = most common) *Computed Tomography (CT) *Magnetic Resonance Imaging (MRI) *Ultrasound (US) Positron Emission Tomography (PET) Angiography: Catheter, CTA, MRA Magnetoencephalography (MEG) Radiography Single photon emission computed tomography (SPECT) Imaging Modalities
Interoperative MRI uses and precautions:
surgical tool protocol (metal and magnets can be a dangerous combo)
useful for resection procedures
epilepsy tx (hemi-ectomy)
What are the 2 most common modalities for CNS imaging?
CT and MRI
better to evaluate soft tissues such as the brain, liver, and abdominal organs, as well as to visualize subtle abnormalities that may not be apparent on regular X-ray tests.
CT appearance:
gray matter brighter
CSF darker
bones of cranium bright
CT uses ___ to produce imaging.
x-rays
What is a precaution for use of contrast material ?
renal dysfxn
