CNS Didactic test out

The technologist's responsibilities during the tracer administration for a cisternogram include

Ensuring personnel and the surrounding areas are not contaminated with radioactivity

In a VP shunt study of a patient whose shunt is patent, we should see RPx activity

In the abdomen within minutes after after injection

Counting cotton gauze that has been placed in a patient's nose after intrathecal tracer administration is most useful when which condition is suspected:

Rhinorrhea

The major potential complication of untreated CSF rhinorrhea is

Encephalitis

The posterior fossa is best visualized on the _________ planar view

Posterior

What is an average dose for an adult brain study using Tc-HMPAO

10-30 mCi

A group of age-related symptoms involving progressive impairment of brain function resulting in diminished thinking ability, loss of memory, and personality changes is called:

Dementia

Which of the following are some considerations for possible errors that could contribute to an undiagnostic brain scan

Patient comfort and immobility for the duration of the study, patient to detector distance, and artifacts from poor quality control technical factors

The normal volume of CSF found in a normal 70 kg adult is about _______mL

135

A good brain perfusion imaging agent

has a high extraction rate

In performing cisternography, the purpose of acquiring the first image over the lower thoracic/lumbar spine is to ascertain

That the tractor was not infiltrated

The HMPAO images of a patient with Alzheimer's disease should demonstrate

symmetric bilateral posterior temporal and parietal perfusion defects

The purpose of using acetazolamide in connection with a brain agent is to

evaluate cerebrovascular ischemia

The pattern of FDG uptake/glucose metabolism in patients with multi-infarct dementia is characterized by the presence of

Scattered foci of hypo metabolism

Brain dead studies with Tc-99m DTPA are considered positive if they demonstrate

no blood flow through the cerebral cortex

Most substances are normally excluded from healthy brain tissue due to an intact

blood brain barrier

Ottorhea typically presents on a CSF study as

3-4 times more rpx activity in the pledgets than the plasma

On the basis of blood flow, which of the following is visualized as an area of high tracer concentration on a brain image performed with Tc-99 exametazime

Gray matter

A patient presents with communicating hydrocephalus. The CSF then demonstrates

early entry of the RPx into the lateral ventricles at 4-6 hrs which persists at 24 and even 72 hrs

SPECT brain imaging may begin how soon after the administration of 99mTc-exametazime:

As early as 20 minutes, preferably 1-2 hours

Which of the following tracers may be used to confirm brain dead

Tc-99m exametazime

A technologist injects a patient with 1mCi of Tc99m DTPA IV for a ventricular septum study, Which if the following is true

Correct dose, correct RPx, incorrect route of administration

Which of the following RPx crosses an intact blood brain barrier

Tc99m bicisate

Which of the following is NOT an indication for SPECT brain perfusion imaging

Demonstrating a pituitary microadenoma

The primary purpose of assessing seizure disorders with HMPAO is to

Localize the site of seizure activity in the brain

The agent of choice for assessing Blood brain barrier disruption is

DTPA

In cerebral radionuclide angiography, the scintillation camera should be started ------- injection of the RPx

immediately

The primary purpose of assessing seizure disorders with HMPAO is to

Localize the site of seizure activity in the brain

On the 6-hour image, radioactivity is visualized in all of the following areas during a normal cisternogram except

Lateral ventricles

Ottorhea typically presents on a CSF study as

3-4 times more rpx activity in the pledgets than the plasma

When preforming a CSF study on a child,

images are taken earlier than in an adult

The most common clinical indication for cisternography for CSF imaging include

Normal pressure hydrocephalus (NPH)

The normal appearance of CSF is

Colorless and clear

Organizing problem-solving attention and planning are controlled by the ________ lobe

Frontal

Multiple focal cortical and subcortical defects on FDG study indicate diagnosis of

Multi-infarct vascular dementia

The least useful view when performing static views on a brain study is usually the

Vertex

CSF circulates in the ______ space

subarachnoid

during planar imaging using radiopharmaceutical that do not penetrate the intact blood brain battier, the 'donut sign' may be indicative of which of the following?

all of the above

which of the following central nervous studies is routinely used for the determination of brain death?

blood brain barrier study using Tc-99m HMPAO

the venous phase of a cerebral perfusion study is marked by

the arrival of activity in the superior sagittal sinus

successful intrathecal injection on cisternography images should demonstrate

activity in the cisterns at 3 hours