Advanced Imaging Computed
Tomography
What are some drawbacks to Tomography? - correct answer ✔✔-Slow
-Blurry
-Superimposition
-Low contrast
-Fixed density and contrast
Who is Godfrey Hounsfield? - correct answer ✔✔Inventor of the clinical CT
When was CT invented? - correct answer ✔✔1971
What was the first scanner capable of doing? - correct answer ✔✔Head scans only
Define Computed: - correct answer ✔✔Determines by mathematical methods
Define "Tomos" - correct answer ✔✔Cut, Incision, Section
Define "Graphia" - correct answer ✔✔To write, to draw
What are the fundamentals of CT? - correct answer ✔✔Process of creating a cross-sectional
tomographic plane of any part of the body
What are the components of CT? - correct answer ✔✔-Patient
-Detector assembly measures radiation (in thin sections) exiting the patient
-Feeds information back to the computer (Primary Data: algorithms)
-Reconstructs and displays the primary data into an image
, 1st generation CT Scanner - correct answer ✔✔-1970's
-Single detector
-Pencil beam
-1 hour for exam
2nd generation CT Scanner - correct answer ✔✔-Head and body imager
-Multiple radiaiton detectors
-Translate-rotate motion
-10 minutes for exam
3rd Generation - correct answer ✔✔-Wide fan shaped beam
-360 degree rotate-rotate: no translation
-500-800 rotating detectors
-As fast as 1/2 second per rotation
One rotation... - correct answer ✔✔One slice
4th Generation CT Scanner - correct answer ✔✔-1980s
-Provides short bursts of radiation
-1 minute for multiple slices
Modern CT Scanners - correct answer ✔✔-Slip ring technology
-Categorized by tube and detector movement
Slip Ring Technology - correct answer ✔✔Electromechanical devices that transmit electrical energy
across rotating interface
Tomography
What are some drawbacks to Tomography? - correct answer ✔✔-Slow
-Blurry
-Superimposition
-Low contrast
-Fixed density and contrast
Who is Godfrey Hounsfield? - correct answer ✔✔Inventor of the clinical CT
When was CT invented? - correct answer ✔✔1971
What was the first scanner capable of doing? - correct answer ✔✔Head scans only
Define Computed: - correct answer ✔✔Determines by mathematical methods
Define "Tomos" - correct answer ✔✔Cut, Incision, Section
Define "Graphia" - correct answer ✔✔To write, to draw
What are the fundamentals of CT? - correct answer ✔✔Process of creating a cross-sectional
tomographic plane of any part of the body
What are the components of CT? - correct answer ✔✔-Patient
-Detector assembly measures radiation (in thin sections) exiting the patient
-Feeds information back to the computer (Primary Data: algorithms)
-Reconstructs and displays the primary data into an image
, 1st generation CT Scanner - correct answer ✔✔-1970's
-Single detector
-Pencil beam
-1 hour for exam
2nd generation CT Scanner - correct answer ✔✔-Head and body imager
-Multiple radiaiton detectors
-Translate-rotate motion
-10 minutes for exam
3rd Generation - correct answer ✔✔-Wide fan shaped beam
-360 degree rotate-rotate: no translation
-500-800 rotating detectors
-As fast as 1/2 second per rotation
One rotation... - correct answer ✔✔One slice
4th Generation CT Scanner - correct answer ✔✔-1980s
-Provides short bursts of radiation
-1 minute for multiple slices
Modern CT Scanners - correct answer ✔✔-Slip ring technology
-Categorized by tube and detector movement
Slip Ring Technology - correct answer ✔✔Electromechanical devices that transmit electrical energy
across rotating interface
