sp 2008

Question 1

If you foolishly did not use a grid for an AP lumbar film and adjusted the radiographic technique to maintain good density what would be the outcome?

Answer 1

the film would be very grey

Question 2

If you wanted to alter your contrast so that a radiograph had more gray tones, what would you have to increase?

Answer 2

kV

Question 3

Determine which radiographic technique would yield a longest scale of contrast.

Answer 3

95 kV with 10 mAs

Question 4

To double the density of a film by using mAs, what would you do?

Answer 4

increase mAs by 100%

Question 5

If you had a film that was under-exposed but you could see the image, which of the following would improve your film?

Answer 5

decrease mAs 50%

Question 6

How much increase in mAs is needed to maintain the same density when reducing the X-ray field from 14x17 to 8x10?

Answer 6

60%

Question 7

If you wanted to decrease the density of a film, which of the following would be the best way to do it?

Answer 7

reduce the mA

Question 8

Which of the following best describes the outcome of reducing the mAs by one half and keeping the kV and the distance constant?

Answer 8

the film density would be decreased

Question 9

Which of the following would produce the same film density as ‘200 mA for 0.5 sec?

Answer 9

100 mA for 1 second

Question 10

If you took a retake and reduced the kVp by 15% and increased the mAs by adding 30% how would the second film look compared to the first?

Answer 10

second film would be lighter than the first

Question 11

Generally speaking, adding 4 kVp to a radiographic technique with a single phase machine would be the equivalent to what?

Answer 11

increase mAs by 50%

Question 12

To what does the 15% rule apply?

Answer 12

kV

Question 13

Lets say that you took an AP thoracic film with 70 kV and 50 mAs and it came out underexposed but you could see all the structures what you wanted, which choice would be the best to do?

Answer 13

increase kV by 15%

Question 14

As a general rule, if you are going to X-ray an elderly patient, you should do which if the following to your established radiographic technique?

Answer 14

decrease it

Question 15

What is the main reason why fixed kV techniques are preferred?

Answer 15

contrast is constant

Question 16

Which of the flowing could be a problem if your X-ray tube was laterally shifted from the center of the film?

Answer 16

shape distortion

Question 17

Of the following which would produce a film with the most visible grain?

Answer 17

highkVp/ low mAs film

Question 18

What is undesirable with magnification distortion?

Answer 18

the borders if the object will be blurred

Question 19

Which. of the following effects does using a high kV technique have?

Answer 19

produces more scatter

Question 20

The rays that exit the patient and hit the film are termed what?

Answer 20

remnant rays

Question 21

Which is true about air-gap technique when normally used in a cervical spine series?

Answer 21

it usually doesn’t require the use of a grid

Question 22

When going from a grid to a non-grid technique on the same body part with the same FFP, kVp, and mAs would cause which of the following?

Answer 22

the film would be darker

Question 23

A film that is lighter on one side than the other most likely would indicate _____.

Answer 23

grid cut off

Question 24

What type of grid is best for your office?

Answer 24

stationary focused grid

Question 25

What type of cross-hatched grid do you want to get?

Answer 25

the one with aluminum between the lead strips