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?

Plaques and tangles associated with Alzheimer’s disease are present in patients with Pick’s disease.

As count rate increases, ____________ rate increases exponentially.

Which of the following signs should be posted if a person could receive more than 5 mrem in an hour at 30 cm? **Note: Please do not look at the signs on p. 122 in Waterstram-Rich and Gilmore (8th ed.). The information is incorrect.**

__________ has a maximum radiation level at any point on the external surface of greater than 0.5 mrem/hr but less than or equal to 50 mrem/hr.

It has been shown that there is a correlation between the intensity of uptake in primary brain tumors and the grade of the tumor.

__________ is the federal governing body that has the primary mission of protecting public health and safety and the environment from the effects of radiation from nuclear reactors, materials, and waste facilities.