Computed Tomography (CT) QUESTIONS WITH CORRECT ANSWERS!!
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Course
Computed Tomography
Institution
Computed Tomography
Computed Tomography (CT) correct answers Medical Imaging technique in which computer-enhanced cross-sectional X-ray images are obtained for a diagnoses.
Johann Radon correct answers He developed the mathematical theory "Radon Transform" in 1917 that allowed images to be reconstructed from medica...
Computed Tomography (CT) QUESTIONS WITH
CORRECT ANSWERS!!
Computed Tomography (CT) correct answers Medical Imaging technique in which computer-
enhanced cross-sectional X-ray images are obtained for a diagnoses.
Johann Radon correct answers He developed the mathematical theory "Radon Transform" in
1917 that allowed images to be reconstructed from medical scans.
Lay the groundwork for Hounsfield/Cormack*
Godfrey Hounsfield correct answers "Father of CT" / British Engineer
He developed the FIRST Axial CT scanner for EMI Laboratories in 1972.
Allan MacLeod Cormack correct answers South African Physicist
He developed the necessary mathematics in order for the FIRST Axial CT scanner to function
in 1972.
James Ambrose correct answers Radiologist at Atkinson-Morley's Hospital
He worked with Hounsfield in order to evaluate the usefulness of the FIRST CT machine in
1972.
October 1, 1972 correct answers Date that the FIRST CT scan was done on a LIVING human
being. Helped to diagnose a brain lesion in a female patient.
Computerized transverse axial scanning correct answers The name of the first CT scanner,
1972.
Dr. Robert Ledley correct answers Professor of Radiology, Physiology and Biophysics
He developed the FIRST full-body CT machine 1974.
CT "generations" correct answers Referred to the method of CT scanning, it describes the
advancements in Technology through the years.
First Generation - Modern CT scanners
(3) CT Beam Geometries correct answers *The size, shape, and motion of the beam and its
path
Pencil - Parallel beam
Fan - 10 degree divergent beam
Cone - Wide divergent fan beam *Modern CT*
First generation CT scanner correct answers Head Imaging Only / Pencil Beam / 1972
Translate-Rotate
Scan, table moves, scan..etc
"Water Bag" Head cap - 1st gen only
SLOW
Second generation CT scanner correct answers Head Imaging Only / Mini Fan Beam / 1974
Translate-Rotate
Scan, table moves, scan..etc
, Faster than 1st gen, SLOW
Third generation CT scanner correct answers THIS GEOMETRY WON / 1975
All Imaging / Fan beam
Rotate-Rotate
Curved array of detectors
Beam AND Detectors rotated 360 degrees around pt
FAST
Fourth generation CT scanner correct answers All Imaging / Fan Beam / 1976
Rotate-Stationary
X-ray beam rotated 360 degrees around the patient, but the detectors were stationary in a
circle
FAST , expensive, high scatter
Fifth generation CT scanner correct answers "Electron Beam Gun" or EBCT / 1980's
Cardiac Imaging Only
Stationary-Stationary
X-ray tube and stationary anode
Sixth generation CT scanner correct answers All Imaging / Spiral Beam / 1990's
Spiral-Helical
X-ray beam AND detectors rotate around patient while table moves
CONTINUOUS scanning
(2) Types of CT Image Acquisition correct answers Sequential
Volumetric
Sequential CT scanning correct answers AXIAL scanning, conventional
"Scan-move-scan" or "slice by slice"
Gathers data in sections, single rotation
SLOW
Volumetric CT scanning correct answers SPIRAL-HELICAL scanning, modern
"Continuous scanning"
Scans 360 degrees around patient while table moves
FAST
Slip rings correct answers *What makes Spiral-Helical or continuous scanning a possibility
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