CT

Question 1

Tube voltage range

Answer 1

80 to 140 kV

Question 2

Shortest rotation time for a 360-degree rotation of the x-ray tube

Answer 2

0.3 seconds

Question 3

A small (or zero) number of photons reaching the detector

Answer 3

Photon starvation

Question 4

Third generation scanner

Answer 4

rotate-rotate

Question 5

CT detectors absorb __% of the incident x-ray photon energy

Answer 5

90%

Question 6

Fan beam angle

Answer 6

50 degrees

Question 7

Essential prerequisite to reconstruct a CT slice

Answer 7

Data in sinograms

Question 8

Fat attenuation

Answer 8

-100 HU

Question 9

Hu values generally depend on ___ and ___.

Answer 9

Kv and filtration

Question 10

Phantom measurements are expressed as?

Answer 10

volume computed tomography dose index (CTDIvol) in mGy

Question 11

an increase in CTDI indicates more ___ being used.

Answer 11

radiation

Question 12

CTDI x scan length, expressed in mGy-cm.

Answer 12

Dose-length product (DLP)

Question 13

measures the total amount of radiation (energy) incident on a patient

Answer 13

Dose-length product (DLP)