Introduction to Computed Tomography
CT founded in 1970 by - correct answer ✔✔Sir Godfrey Hounsfield
who Developed the algorithms for the reconstruction of the images? - correct answer ✔✔Allan Cormack
Localizer, also called scalogram, tomogram, pilot or survey - correct answer ✔✔is the 1st C.T image of
exam, or scout film
Voxel ( 3D tissue element) - correct answer ✔✔The basic unit of computed tomography reconstruction,
represented as a pixel in a computed tomography image display.
Translation - correct answer ✔✔each sweep of x-ray tube and detector around the body
Projection (view) - correct answer ✔✔a view of the cross-sectional anatomy
Ray - correct answer ✔✔pencil thin x-ray beam
fan - correct answer ✔✔slit x ray beam
reconstruction time - correct answer ✔✔time from end of CT imaging to image appearance (array
processor)
cone - correct answer ✔✔wider fan x ray beam(multi-slice)
Scan - correct answer ✔✔collection of anatomical data while the x ray is on
1st generation scan, - correct answer ✔✔translate/rotate.
scans only the head,
, pencil beam
2nd generation scan - correct answer ✔✔fan beam, more detectors, for whole body scanning
3rd generation scan , rotate, rotate , - correct answer ✔✔all modern scanners are derive from this
generation
4th generation scan - correct answer ✔✔only x ray tube moves around the patient, the detector is
stationary
5th generation scan (heart only) - correct answer ✔✔EBT, or Electron Beam Tomography, for Cardiac
Scanning only
6th generation (spiral) - correct answer ✔✔Continuous rotation scanners, Slip rings allow for continuous
rotation of x-ray tube
7th Generation Scanners or Multislice C.T - correct answer ✔✔also called Volumetric scanners,
with Multiple parallel detector arrays
-Single slice, 4 up to 64 slices
Somatron Dual Source
Flash C.T Scanner - correct answer ✔✔360 degrees rotation, 2 x-ray tubes and 2 detector
arrays mounted on a revolving
gantry
( 80 ms imaging)
Gantry - correct answer ✔✔The doughnut-shaped part of the CT scanner, it Houses the X-ray tube,
the Detector array and the
Collimator assembly
CT founded in 1970 by - correct answer ✔✔Sir Godfrey Hounsfield
who Developed the algorithms for the reconstruction of the images? - correct answer ✔✔Allan Cormack
Localizer, also called scalogram, tomogram, pilot or survey - correct answer ✔✔is the 1st C.T image of
exam, or scout film
Voxel ( 3D tissue element) - correct answer ✔✔The basic unit of computed tomography reconstruction,
represented as a pixel in a computed tomography image display.
Translation - correct answer ✔✔each sweep of x-ray tube and detector around the body
Projection (view) - correct answer ✔✔a view of the cross-sectional anatomy
Ray - correct answer ✔✔pencil thin x-ray beam
fan - correct answer ✔✔slit x ray beam
reconstruction time - correct answer ✔✔time from end of CT imaging to image appearance (array
processor)
cone - correct answer ✔✔wider fan x ray beam(multi-slice)
Scan - correct answer ✔✔collection of anatomical data while the x ray is on
1st generation scan, - correct answer ✔✔translate/rotate.
scans only the head,
, pencil beam
2nd generation scan - correct answer ✔✔fan beam, more detectors, for whole body scanning
3rd generation scan , rotate, rotate , - correct answer ✔✔all modern scanners are derive from this
generation
4th generation scan - correct answer ✔✔only x ray tube moves around the patient, the detector is
stationary
5th generation scan (heart only) - correct answer ✔✔EBT, or Electron Beam Tomography, for Cardiac
Scanning only
6th generation (spiral) - correct answer ✔✔Continuous rotation scanners, Slip rings allow for continuous
rotation of x-ray tube
7th Generation Scanners or Multislice C.T - correct answer ✔✔also called Volumetric scanners,
with Multiple parallel detector arrays
-Single slice, 4 up to 64 slices
Somatron Dual Source
Flash C.T Scanner - correct answer ✔✔360 degrees rotation, 2 x-ray tubes and 2 detector
arrays mounted on a revolving
gantry
( 80 ms imaging)
Gantry - correct answer ✔✔The doughnut-shaped part of the CT scanner, it Houses the X-ray tube,
the Detector array and the
Collimator assembly
