Radiography

Question 1

The purpose of an aluminum filter in an x-ray machine is to do, which of the following
A) limit the frequency of the x-ray beam
B) focus the x-ray beam on the focal spot
C) remove interference ions from the x-rays in the beam
D) remove the lower energy wavelength x-rays from the x-ray beam

Answer 1

D

Question 2

If mAs represents the blackening of an image, it actually measures the degree of which factor
A) density
B) contrast
C) radiolucent
D) radiopaque

Answer 2

A

Question 3

Which of the following is an example of positive contrast media that may be injected intervascularly
A) water soluble barium
B) water soluble iodine
C) non-soluble barium
D) both A and B

Answer 3

B

Question 4

Which of the following causes quantum mottle on radiographic film?
A) patient too thick
B) film speed too fast
C) intensifying screen speed too fast
D) two few photons (reduced mAs) producing the image

Answer 4

D

Question 5

Which part of the x-ray machine contains a major kV selector and a minor kV selector with a kV metre on the control console that indicates the chosen kill voltage
A) milliamperage selector
B) autotransformer
C) time circuit
D) cathode

Answer 5

B

Question 6

As the contrast of radiograph decreases, which of the following results
A) black-and-white radiograph with a few grays, but greater differences between each grey
B) black and white radiograph with many steps, but fewer differences between each step
C) greater radiograph with few steps, but greater differences between each step
D) greater radiograph with many steps, but fewer differences between each step

Answer 6

D

Question 7

Which is most likely to result from not following proper safelite procedures in the x-ray dark room
A) fogging of the film
B) underexposure of the film
C) a dark boarder around the edges of the film
D) clearing of the film when it is developed and fixed

Answer 7

A

Question 8

What occurs with an increase in the object film distance or source object distance?
A) sharper image that is smaller
B) sharper image that is larger
C) less sharp image that is smaller
D) less sharp image that is larger

Answer 8

D

Question 9

Which radiography error is more likely to cause a black mark on a film image rather than a white or clear area on a radiographic image
A) collimation along the edges
B) linear dots from too low humidity
C) smudges of fixer on film prior to developing
D) debris in the cassette

Answer 9

B

Question 10

How should the x-ray beam be directed for a lateral view of a snakes G.I. tract?
A) vertical
B) horizontal
C) ventrodorsal
D) rostrocaudal

Answer 10

B

Question 11

Which term describes the scattering of radiation that occurs when an incoming photon ejects an outer shell electron from the atom, causing the photon to lose energy and change direction, often leaving the atomic part
A) compton effect
B) absorption effect
C) photoelectric effect
D) bremsstrahlung radiation

Answer 11

A

Question 12

In radiography, what effect does a lower kV have on the image?
A) total absorption of the energy of the incoming x-ray photon
B) increased patient dose
C) increased contrast
D) all of the above

Answer 12

D

Question 13

Which best describes thermionic emission
A) an electron cloud is formed
B) electrons are boiled off the filament
C) alternating current is converted to a direct current
D) negative electrons are rapidly attracted to the positive anode

Answer 13

B

Question 14

Which is the electrically positive portion of the x-ray tube
A) anode
B) target
C) cathode
D) filament

Answer 14

A

Question 15

Which is a key difference in avian imaging, as opposed to canine or feline radiography
A) shorter scale of contrast with lower kV
B) no measuring of the patient
C) greater exposure factors
D) longer exposure times

Answer 15

B