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DEH204
5A
| Question | Answer |
|---|---|
| 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
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