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RAD107 Week 12 Exam

TermDefinition
DRT Digital Radiographic Tomosynthesis
X-ray tube motion Continuous sweep and step and shoot are the two methods to produce a DRT image
CAD Computer aided detection
DRT artifacts Has its own artifacts -blurred ripple and truncation
1st Gen CT translate and rotate, pencil beam,single detector, 5 minute imaging time.
2nd Gen CT translate and totate, fan beam,detector array, 30 second imaging time
3rd Gen CT rotate and rotate,fan beam , detector array, subsecond imaging time,
4th Gen CT rotate and stationary , fan beam,detector array, subsecond imaging time
Interpolar algorithims Linear interpolation at 180 degrees improves z-axis resolution
Operating console two or more monitors
Computer Microprocessor and primary memory
Gantry x-ray tube, detector array, collimation , HV generator, table
Spatial resolution A low spatial frequency represents large objects and a high spatial frequency represents small objects
Contrast resolution Contrast resolution is superior in CT principally because of x-ray beam collimation and postprocessing
Noise A large variation of pixel values represents high image
Created by: ygaribay725
 

 



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