The Tolerance Limit for a CT Number Calibration QC Test

question 12

Multiple Choice

The tolerance limit for a CT number calibration QC test is:

• A) ±3 CT numbers.
• B) ±5 CT numbers.
• C) ±8 CT numbers.
• D) no tolerance limit has been established.

---

Definitions:

Dominant Mutant Allele

A variant of a gene that is more potent in expressing its trait even in the presence of its normal counterpart.

Heterozygote Advantage

A phenomenon in which the heterozygous condition confers some special advantage on an individual that either homozygous condition does not (i.e., Aa has a higher degree of fitness than does AA or aa).

Chorionic Villus Sampling

A prenatal test where samples of the chorionic villi are taken to test for genetic disorders in the fetus.

Amniocentesis

Sampling of the amniotic fluid surrounding a fetus to obtain information about its development and genetic makeup. Compare with chorionic villus sampling.