Scan acquisition and user interface basics

Question 1

(i.e. the scanned
projection radiograph, often acquired by the
CT system to allow the user to prescribe the
start and end locations of the scan range)

Answer 1

CT localizer radiograph

Question 2

Data acquisition while the
patient table remains stationary; the table
position may be incremented between x-ray
exposures to collect data over a longer z
axis range.

Answer 2

Axial scan mode

Question 3

: Data acquisition while the patient table is
continuously moving along the z axis

Answer 3

Helical or Spiral scan mode

Question 4

: Data acquisition at multiple time
points over the same anatomic location(s)
while the patient table remains stationary; xray exposure can be continuous or
intermittent

Answer 4

Dynamic scan mode -

Question 5

• multiple detector
  widths: Data acquisition at multiple time
  points over the same anatomic location(s)
  while the patient table cycles back and forth
  between designated start and end locations
  in order image a region wider than the
  detector

Answer 5

Dynamic scan mode

Question 6

Intermittent x-ray
exposures

Answer 6

Interventional CT -

Question 7

Table increment (mm) per __ degree
rotation of the x-ray tube (axial scan
mode)

Answer 7

360