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Contrast media enhancement is divided into three phases.  The __________ phase occurs when two spots have less than a 10 HU difference.

Which of the following lipids is essential for membrane fluidity and as a precursor for bile acids and hormones?

Which statement is true regarding glucose transport into cells via facilitated diffusion?

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

Simplify. Your answer should contain only positive exponents. 

Why does a nuclide decay by positron emission?

Displacement on a sinogram equals __________.

__________ can cause hyperglycemia which alters the biodistribution of 18F-FDG.  

Why should dextrose 5% in water be included in the crash cart?  

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