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DEH204

5A

QuestionAnswer
List four factors affecting film quality Exposure time milliamperage, kilovoltage, target to receptor distance
milliamperage more electrons avalibe to the cathode to interact with the target to created x rays.
Radiographic density Controlled by variations in either milliamperage and or exposure time
Increase the milliamperage will cause the density to be what? darker and has a greater density
Increasing the exposure time will cause what to happen? long exposure times darken and image and causes it to have greater density
what can you increase together and create a radiograph? milliamperage and exposure time simultaneously (called mA {milliamperage pre second})
increasing kVp will do what to contrast? Decrease it
Short scale contrast is produced by using a ____? Low kiliovoltage
more shades of gray are preferred when taking a radiograph of which type? periapical
shortening the target to object distance from 16 PID an 8 PID with not other adjustments will do what? will make the new image darker
8 PID and 10 Impulses changes to a 16 PID what will the impulse be? 40 impulses
the longer the developing time the ________ a radiograph is more dense
the longer the exposure time the _______ dense the radiograph is More
___ mA x ____ impluse = ___ mAs formula to figure how to get an image of = quality with diffent factors
rule for kVp increase every kVp increased (x 15) we must divide the exposure time in half to maintain density (vicversa for decrease just double the time. )
A radiograph that shows many variations in shades is considered ______ contrast long scale
how does one adjust the kiliovoltage to achieve a higher contrast lower it
___ mA x ____ impluse = ___ mAs formula to figure how to get an image of = quality with diffent factors
rule for kVp increase every kVp increased (x 15) we must divide the exposure time in half to maintain density (vicversa for decrease just double the time. )
A radiograph that shows many variations in shades is considered ______ contrast long scale
using kilovoltage how do you get a love contrast? raise it
can you make changes to contrast using mA? no
can you make changes to density using kVp? yes
double distance = 4 x the exposure time. Time and distance on radiographic density
Created by: ashblake4