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Exposure T-1 Review
SWGTC-R/T-Exposure T-1-Review
| Question | Answer |
|---|---|
| 200 mA, 2 sec, 110 kVp, Fast (200) screen. The new mA is 800. What will the new screen speed be to maintain radiogrphic density? (a) RE-400 (b) Medium- 100 (c) Fast-200 (d) Slow-50 | (d) Slow-50 |
| Re(320) screen, 12:1 grid, 60 mAs, 85 kVp. Change to a 6:1 grid, what is the new mAs if maintaining radiographic density? | 24 mAs |
| As the ratio of the grid decreases, while maintaining radiograhic density, what effect on patient exposure can be expected? | decrease |
| 300 mA, 2 sec, 110 kVp, Med-100 screen. New mA is 600, to maintain radiographic density, what will the new screen speed be? (a) Fast-200 (b) Med-100 (c)Slow-50 | (c) slow |
| 300 mA, .15 sec, 78 kVp <while maintaining density> what will the new kVp be at 600 mA, .15 sec? (a) 80 (b) 70 (c) 90 | (b) 70 |
| 100 mA, 1.0 sec, 70 kVp <while maintaining density> what will the new kVp be at 400 mA, 0.50 sec? (a) 60 (b) 80 (c) 70 | (a) 60 |
| 200 mA, .15 sec, 82 kVp, 6:1 grid <maintaining density> ____mA, .30 sec, 82 kVp, 10:1 grid. (a)300 (b)200 (c)100 | (b)200 |
| 100 mA, .15 sec, 80 kVp, 8:1 grid <maintain density> ____mA, .30 sec, 92 kVp, 16:1 grid (a) 200 (b) 400 (c) 50 | (c) 50 |
| 100 mA, 1.0 sec, 6:1 grid, 74 kVp <maintaining density> 400 mA, ____sec, 10:1 grid, 78 kVp (a) .33 (b) .50 (c) .20 | (b) .50 |
| 100 mA, .15 sec, 80 kVp, 8:1 grid <maintain density> 50 mA, .30 sec, 92 kVp, ______grid (a) 6:1 (b) 16:1 (c) 8:1 | (b) 16:1 |
| 600 mA, .10 sec, 92 kVp, 10:1 grid <maintain> 400 mA, .15 sec, 78 kVp, _____grid. (a) 8:1 (b) 5:1 (c) 16:1 | (b)5:1 |
| 100 mA, .15 sec, 80 kVp, 8:1 grid, 200 screen <maintain> ______mA, .30 sec, 92 kVp, 16:1 grid, 100 screen (a) 100 (b) 200 (c) 300 | (a)100 mA |
| 200 mA, .15 sec, 82 kVp, 6:1 grid, 50 screen <maintain> ____mA, .03 sec, 82 kVp, 10:1 grid, 200 screen (a) 100 (b) 300 (c) 500 | (c) 500 |
| Lead foil is incorporate into the back of the cassette to ______________. | reduce backscatter |
| A grid is designed with 0.125 mm thick lead strips, 4 mm in height and seperated by 0.5 mm alum spacers. What is the grid ratio? (a) 5:1 (b) 8:1 (c) 16:1 | (b) 8:1 |
| The distane at which a focus grid can be used is directly related to the _________. | interspacing material |
| 400 mA, 1.0 sec, 87 kVp, slow (50) screen. Change the screen speed to high (200), without adjustment to other factors, choose correct effect and density value. (a) increase, 1200 mAs (b) increase, 1600 mAs (c) decrease, 1600 mAs | (b) increase, 1600 mAs |
| 600 mA, 1.0 sec, 87 kVp, high (200) screen. Change the screen to Slow (50), what would the new density value be? (a) 75 (b) 150 (c) 2400 | (b) 150 |
| If the same exposure factors are used on four different radiographs, and all that is changed is the SID, which would display the greatset density? (a) 72 in (b) 56 in (c) 36 in | (c) 36 in |
| For maintaining original density, mA and exposure time are ______________ proportional. | inversely |
| 100 mA, _____ sec, 5 mAs | 1/20 |
| 400 mA, .20 sec, ____mAs | 80 |
| ____mA, 3/4 sec, 300 mAs | 400 |
| 500 mA, 1/60 sec, ____mAs | 8.33 |
Created by:
kristinalyn
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