Part 6

Question 1

What is the angle of coverage by the x-ray beam as it emerges from the tube housing and exposes the detector array within the scan plane (x-y axis)?

Answer 1

Fan Angle

Question 2

What is a scan plane?

Answer 2

x-y axis

Question 3

What is a cone beam correction algorithm utilized to overcome potential attenuation calculation errors from the divergent beam of MSCT systems?

Answer 3

Feldkamp-David-Kress (FDK) Algorithm

Question 4

What does FDK stand for?

Answer 4

Feldkamp-David-Kress (FDK) Algorithm

Question 5

What is the mathematical process of CT image reconstruction that involves convolution of the raw data prior to their projection back onto a matrix?

Answer 5

Filtered Back-Projection

Question 6

What is the removal of the low-energy x-ray photons emitted from the x-ray tube to improve beam quality and reduce patient radiation dose?

Answer 6

Filtration

Question 7

What is a large-area detector consisting of a film of scintillating crystals bonded to a matrix of silicon photosensors?

Answer 7

Flat-Panel Detector

Question 8

What may be used in place of the segmented detector rows found in MDCT systems?

Answer 8

Flat-Panel Detectors

Question 9

What is a electronic switching technique whereby the electron beam is electromagnetically steered toward two separate locations on the rotating anode?

Answer 9

Flying Focal Spot

Question 10

What results in the emission of two sources of x-radiation from the CT x-ray tube and a doubling of the data samples acquired from each gantry rotation?

Answer 10

Flying Focal Spot

Question 11

What is the midpoint of a slice sensitivity profile (SSP), where the effective section width for a CT acquisition is determined?

Answer 11

Full Width at Half Maximum (FWHM)

Question 12

What does FWHM stand for?

Answer 12

Full Width at Half Maximum (FWHM)

Question 13

What does SSP stand for?

Answer 13

Slice Sensitivity Profile