It is similar to conventional nuclear medicine planar imaging using gamma camera but able to provide true 3D information

Is a simple soluble dissolved ion, such as ISOTOPE OF GALLIUM (III)

is attached to a specific ligand to create a radioligand whose properties bind it to certain types of tissues.

Is a radioactive biochemical substance that is used for diagnosis or for research-oriented study of the receptor system of the body

it is a ligand that is radiolabeled

Tracers used emits gamma radiation that is measured directly

Tracers emit positron that annihilate with electrons up to a few millimeters away, causing two gamma photons to be emitted in opposite directions.

It Is very similar to planar gamma camera imaging

It detects these emissions “coincident” in time, which provides more radiation event localization information and thus higher spatial resolution images

are significantly less expensive because they are able to use longer-lived and more easily obtained radioisotopes

Are acquired at defined points during the rotation, typically every 3-6 degrees

In most cases, a _____ rotation is used to obtained an optimal reconstruction

The total Scan time of SPECT images is

Is an imaging test that shows how blood flows to tissues and organs

SPECT may be used to help diagnose what?

(Select 6 asnwers)

The ____ is what allows doctors to see how blood flows to tissues and organs.

Is a nuclear imaging scan that integrates computed tomography (CT) and a radioactive tracer

Is radiolabeled, meaning it emits gamma rays that can be detected by the CT scanner

It collects the information emitted by the gamma rays and Displays it on the CT cross-sections

The ____ can be added back together to form a 3-D image of your brain

if your doctor is looking at a tumor, what radiotracer will he/she use?

The tracer stays in your bloodstream rather than being absorbed by surrounding tissues, there by limiting the images to areas were blood flows.

Are cheaper and more readily available

Is primarily used to view whole blood flows through arteries and veins in the brain

Tests have shown that it might be more sensitive to brain injury because it can detect reduced blood flow to injured sites.

Is also useful for pressurgical evaluation of medically uncontrolled seizures

Refers to the period BETWEEN SEIZURES

Is defined as the period of a seizure or during a seizure

Who will perform the test in the nuclear medicine department of the hospital?

Have been defined as “radioactive drugs” that when used for the purpose of diagnosis or therapy, typically elicit no psychological response from the patient

Some Radiopharmaceuticals have been known to cause minor side effects such us;

(Select 2 answers)

The ____ of a radionuclide determines the rate of radioactive decay

(High target - background ratio)

_____ is only of use if it accumulates within the target organ and this is often enhanced by binding the radionuclide onto a tracer that will take it to the organ under study

To avoid excessive received radiation dose, it is necessary to avoid those radionuclides which have significant particulate emissions like:

(Select 2 answers)

Means that these are absorbed within the patient, adding to the radiation dose with no increase in image quality

The rate of emission of this race can be significantly lower into particular decay processes:

It has the ability to readily bind to a wide variety of compounds under psychological conditions without causing psychological changes in the patient

an element can be defined as atoms that contain an unstable nucleus and dissipate excess energy by spontaneously emitting radiation in the form of alpha, beta and gamma rays.

To acquire SPECT images, the ______ is rotated around the patient.

This type of scanning is also useful in diagnosing stress fractures in the spine (spondylosis), blood deprived (ischemic) area in the brain following a stroke and tumors

(SPECT)

To prepare for a test, wear comfortable clothing and be prepared to stay for _____ hours

(During the test)

First, you will receive an injection of a ____ amount of radioactive tracer.

(During the test)

After injecting small amount of radioactive tracer. You’ll be asked to rest for about ______ until the tracer reaches your brain.

(T/F)

The tracer is radioactive, which means your body is exposed to radiation.

(T/F) The exposure is limited, however, because the radioactive chemicals have SHORT HALF-LIVES

The tracer breakdown quickly and removed from the body through the ______

In projections, the time taken to obtain each projection is also variable, but _____ is typical

If the half-life is very ____, then the activity may have decayed to a very low level before imaging can be started.

This can result in either a long scanning time, where there will be patient movement

OR

Too short a time for image, resulting in poor count statistics

If the half-life is too ____, then there may be excessive radiation exposure to the patient over its period of decay

(T/F)

The binding should be sufficient that little radionuclide is left FREE in the body tissues does enhancing the target-to-background ratio

___ Are often found as a product of decay

Other radionuclides are produced in ____ as specialized unit and are shipped ready for use