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Exposure T-1 Review

SWGTC-R/T-Exposure T-1-Review

QuestionAnswer
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