CT prep physics and instrumentation

revolution of gantry used to be limited because of hardwiring, not ________tech eliminates need for cables

It allows for continuous ______acquisition—the standard for CT imagi9ng

slip ring

helical

smaller focal spots improve/make shitter the geometric efficiency of beam

improve

the steering of electron beam to 2 separate locations is called ________

This oversampling improves _____ and ________reso

flying focal spot technology

temporal, spatial

mA ranges form ____to_____

30 - 800

mAs is the same as photon flu____

The rate at which the above term passing over a unit area is called photon_____

fluence, flux

MAs is inversely/directly proportional to image noise

inversely

Effective mAs is mAs per______

The main controlling factor is table____

slice, speed

Lower kVp may improve_______ particualrly on _______studies

Higher kVp is good for getting rid of ______artifacts when beam is passing thru very______parts

contrast, angio

streak, dense