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107 Final

QuestionAnswer
Breast Tissue Composition Changes with age: fatty vs dense tissue
Microcalcification Detection Diagnostic requirement: ability to detect microcalcifications <500 μm
Power rating for interventional radiography tube ≥20 kW
Focal spot size for magnification ≤0.3 mm
Femoral artery puncture: 18-gauge Seldinger needle.
CT 1st gen: translate-rotate, single detector, long scan time.
CT 2nd gen: multiple detectors, reduced scan time, increased translations.
CT 3rd gen: fan beam, detector array, reduced scanning time, higher patient dose considerations.
CT 4th gen: stationary detector, reduced ring artifact
CT Image formation: Each sweep: = rotation or projection
CT Image Formation: Filtered backprojection... for image reconstruction
Pixel size affects... Spatial resolution
Calibration using water= CT number zero
Interpolation allows... reconstruction at any z-axis plane.
Couch movement vs beam rotation: Pitch
Created by: evanlbates
 

 



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