Neuro Imaging-Lecture 3 Flashcards
what type of imaging is most useful for assessing diseases of the skull?
X-rays
what type of imaging is that air replaces a small amount of CSF?
Pneumoencephalography
what type of imaging can you view the ventricles well?
Pneumoencephalography
what is an X-ray based technique that shows the arterial and venous systems of the brain?
cerebral Angiography
what vascular abnormalities of the brain can easily be view in an cerebral angiography
arteriovenous malformations and aneurysms
What abnormalities does a myelography show?
herniated (slipped) intervertebral disks and spinal tumors
Why is contrast not initially given in a CT scan of the head?
because contrast may resemble a bleed
why is a head CT performed usually?
to exclude an intracranial hemorrhage.
does a head CT shoe an infarction in the acute stage?
no
what are other indications for CT scans of the head?
Increased pressure (before lumbar puncture) and head trauma or facial/skull fractures.
How do T1 protons relax versus T2 protons?
T1 is fatty tissue and T2 is watery tissue
why can an MRA aid in the diagnosis of aneurysms or stenoses?
because it can depict arteries
what different magnetic properties does a functional MRI measure?
oxyhemoglobin and deoxyhemoglobin
active neurons have an increased demand for what?
oxygen
what does a PET (positron emission tomography) specially look at, in terms of neurons?
likelyhood of uptake of the administered F-deoxyglucose from the neurons and the occurrence of metabolization of the F-deoxyglucose by the neuron
