sp 2007

Question 1

Which of the following refers to an attenuation of part of the beam by the grid?

Answer 1

grid cut-off

Question 2

When using a stationary grid which of the following is recommended for spinal filming?

Answer 2

a 10:1 grid ratio

Question 3

The use of a grid has which main effect on the patient?

Answer 3

it reduces x-ray exposure to the patient

Question 4

The preferred focused grid range for spinal radiography is _____.

Answer 4

40” to 72”

Question 5

If a film has an overall darkened gray appearance but visible structures the probable cause of the problem would be which of the following?

Answer 5

exposure of the film to scatter

Question 6

When converting from a grid with a low ratio to a grid with a high ratio which of the following would be the best to do to maintain good film quality?

Answer 6

increase mAs

Question 7

The higher the kVp the more ____ radiation is produced.

Answer 7

compton

Question 8

Whats the most common cause of a blurry image in practice?

Answer 8

patient motion

Question 9

Which choice below is the main reason why a “fixed kV” technique is preferred?

Answer 9

contrast is consistence

Question 10

Whats the recommended optimal kV range for the different sections of the spine?

Answer 10

LC- 75-85
APT- 75-85
LT- 85-95
APL- 80-90
LL- 85-95
P- 75-85
FS- 80-100

Question 11

Which of the following exposures would have the lowest contrast?

Answer 11

50 mAs with 110 kV

Question 12

Which is preferred for spinal filming?

Answer 12

a fixed kV technique

Question 13

What is an advantage of a high kVp technique?

Answer 13

lowered patient radiation dose

Question 14

If you increase the mAs and reduce kV from a given radiographic technique what would be the outcome?

Answer 14

it’d have more contrast

Question 15

Which of the following best describes what you should expect if you retake an AP lumbar film with 15% decrease in the kV and leave the mAs constant?

Answer 15

the density of the film would be reduced by 1/2

Question 16

Which of the following would you do if you were going to use the 30% rule?

Answer 16

alter the mAs by 30%

Question 17

If you were re-x-raying an obese patient because your first film was too light but you could see the osseous structure, which of the following would be best thing to do in order to get the best quality radiograph?

Answer 17

increase mAs

Question 18

If a film was taken at 80 kVat 100 mA for 1/2 second and a second was taken at 80 kV at 5 mA for 1 second and a third time at 80 kV for 1/4 second, what would be the outcome?

Answer 18

they would all be the same

Question 19

Picture this! you take a film and its too light. You want to retake it and double the density by using kVp. How would you do it?

Answer 19

increase the kV by 15%

Question 20

Which effect would adding 100% more mAs to a radiographic technique have?

Answer 20

it would double the density of the film

Question 21

Which would absorb the most X-rays in a patient?

Answer 21

their vertebra

Question 22

Exceeding the optimal kV range while maintaining good density will yield a film that has which of the following?

Answer 22

a long scale contrast

Question 23

Which of the following is most closely related to “differential absorption?

Answer 23

subject contrast