Part 2

Question 1

The mathematical process of CT image reconstruction whereby ray sum data are projected back onto a matrix?

Answer 1

Back-Projection

Question 2

The phenomenon whereby low-energy photons are absorbed as the x-ray beam passes through an object, resulting in an increase in the average photon energy of the beam?

Answer 2

Beam Hardening

Question 3

The ratio of table feed per gantry rotation to the total collimation used during acquisition with a multislice CT (MSCT) system?

Answer 3

Beam Pitch

Question 4

What does MSCT stand for?

Answer 4

Multi-Slice CT

Question 5

The dimension of the primary beam in the longitudinal or z-axis as controlled by the pre-patient collimator?

Answer 5

Beam Width

Question 6

The process of electronically combining signal from adjacent detector elements to produce a reconstructed CT image that is thicker than the individual detector width?

Answer 6

Binning

Question 7

The number of information bits contained within each pixel?

Answer 7

Bit Depth

Question 8

A measurement of renal function, determined as the amount of nitrogen in the blood to form of the waste product area?

Answer 8

Blood Urea Nitrogen (BUN)

Question 9

What does BUN stand for?

Answer 9

Blood Urea Nitrogen (BUN)

Question 10

What is the normal range of BUN in adults?

Answer 10

7 to 25 mg/dL

Question 11

A type of filter added to the Ct x-ray tube to compensate for the cylindrical shape of most body parts?

Answer 11

Bow-Tie Filter

Question 12

What type of CT filter is thicker at the ends and helps shape the beam to reduce patient radiation exposure?

Answer 12

Bow-Tie Filter