Beta-amyloid uptake can be assessed through positron emission tomography (PET) using the radiopharmaceutical __________.

A patient had a barium swallow study with dense barium sulfate.  How long should you wait before administering oral contrast material?

Intravenous contrast media contains __________.

The __________ vein delivers approximately 80% of the blood to the liver.

To reduce the number of angular samples by a factor of two, one would add every other row in the sinogram to the previous row and assume the resultant data were acquired half-way between the two samples.  This manner of reducing the angular sampling is referred to as ______.

The __________ determines the labeling and packaging requirements.

Match each type of PET event types with its proper definition.

It is more desirable for a PET crystal to have a long decay time.

As compared to SPECT imaging, which characteristic of the crystal becomes less important?

What is the approximate maximum percentage of single events that are converted into a true annihilation event?