Part 4

Question 1

What is the electronic components of a CT system responsible for measuring the transmitted x-radiation absorbed by the detectors?

Answer 1

Data Acquisition System (DAS)

Question 2

What does DAS stand for?

Answer 2

Data Acquisition System (DAS)

Question 3

What is the pathway of data transmission from the detectors to the computerized components of the system’s data acquisition system?

Answer 3

Data Channel

Question 4

What does the number of data channels for a CT system determine?

Answer 4

The maximum number of sections that may be acquired with each gantry rotation

Question 5

What is the speed at which a computerized storage drive is able to transfer data?

Answer 5

Data Transfer Rate

Question 6

What is the mathematical image processing technique used to generate blood perfusion maps during CT perfusion studies of the brain?

Answer 6

Deconvolution

Question 7

What device is responsible for measuring transmitted radiation and converting it into a proportionate electronic signal to be used for image reconstruction?

Answer 7

Detector Array

Question 8

What is the process of determining section width in the MSCT system as determined by the defined beam width and the number and thickness of detectors utilized for image reconstruction?

Answer 8

Detector Collimation

Question 9

What is the number, length, and organization of the individual detector elements in an MSCT system?

Answer 9

Detector Configuration

Question 10

What is the ratio of table feed per gantry rotation to the acquired section width?

Answer 10

Detector Pitch

Question 11

What definition of pitch is used for helical single-sllice CT (SSCT)?

Answer 11

Detector Pitch

Question 12

What does SSCT stand for?

Answer 12

Single Slice CT (SSCT)

Question 13

What portion of the cardiac cycle when the heart is relaxed?

Answer 13

Disastole

Question 14

What type of pressure reflects the force exhibited on the arterial walls during relaxation of the heart muscle?

Answer 14

Diastolic Pressure

Question 15

What is the bottom or second number provided during the assessment of blood pressure?

Answer 15

Diastole

Question 16

What is the acronym for the Digital Imaging and Communications in Medicine stand for the process of recording, storing, and printing, and transmitting medical image data?

Answer 16

DICOM

Question 17

What is the diameter of the acquired attenuation data displayed across the image matrix?

Answer 17

Display Field of View (DFOV)

Question 18

What does DFOV stand for?

Answer 18

Display Field of View (DFOV)

Question 19

What may also be referred to as the zoom factor or target view?

Answer 19

Display Field of View (DFOV)

Question 20

What is the measurement of dose for an entire series of CT images?

Answer 20

Dose Length Product (DLP)

Question 21

What does DLP stand for?

Answer 21

Dose Length Product (DLP)

Question 22

What is equal to the calculated dose per section multiplied by the length of a CT acquisition along the z-axis?

Answer 22

Dose Length Product (DLP)

Question 23

What is the section of the patient exposed to radiation at the gantry isocenter?

Answer 23

Dose Profile

Question 24

What is simultaneous acquisition, by an MSCT system, of attenuation data for a single antomic section with two x-ray beams, each having a different energy spectrum?

Answer 24

Dual-Energy CT

Question 25

Dual energy CT systems rapidly switch between or alternate _______ ___________ during data acquisition, allowing for improved contrast between substances of differing densities.

Answer 25

kVp settings

Question 26

What CT system consists of two separate x-ray tubes and detector arrays mounted 90 degrees from each other within the gantry, allowing for dual-energy CT acquisition?

Answer 26

Dual-Source CT