CT Flashcards
proposed a method to represent a single slice of the body on the radiographic film (topography)
Allesandro Vallebona
first demonstrated CT technique
Godfrey Newboid Hounsfield
1st CT scan Machine; 180 translation/ 1 degree rotation
EMI Scanner
1st CT system that could make an images of any part of the body; did not require water tank
ACTA
slice/section
tomos
produces sagittal and coronal images
axial tomography
produces transverse images
computed tomography
it refers to movement of source-detector assembly across the px; results in a projection
translation or sweep
represents the attenuation pattern of the px profile
projection
has a pencil beam and one detector; 5 mins scan time
1st Generation CT
has a narrow fan beam and has multiple detectors; bow tie filter
second generation CT
has a wide fan beam
third generation CT
with a detector ring
fourth generation CT
electron beam CT
fifth generation CT
helical (spiral) CT
sixth generation CT
multidetector row CT
seventh generation CT
3 major components CT
- Gantry
- Operating Console
- Computer
Gantry subsystems
- x-ray tube
- detector array
- HVG
- px couch
- mechanical support
group of detectors
detector array
gas detectors
- proportional counter
- ionization chamber
- geiger-muller counter