A Patient Is Scheduled for a ^99mTc-HMPAO Brain Scan

question 9

Multiple Choice

A patient is scheduled for a ^99mTc-HMPAO brain scan.The technologist must remember that ^99mTc-HMPAO

• A)only crosses a compromised blood-brain barrier and in proportion to blood flow.
• B)remains trapped in the subarachnoid space for 20 minutes after injection.
• C)acts as an analog to thallium-201.
• D)remains trapped in the brain in proportion to cerebral blood flow at the time of injection.

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Definitions:

Master Gene

A regulatory gene that controls the expression of one or more genes and thus has a major effect on an organism's phenotype.

Development

Development refers to the process of growth and differentiation that organisms undergo from conception to maturity, encompassing both physical and psychological changes.

Operator

Part of an operon; a DNA binding site for a repressor.

Prokaryotic DNA

The genetic material found in prokaryotes (bacteria and archaea) that is typically circular and located in the cytoplasm.