1. What does the timer control?
(*)duration of exposure
quality of exposure
quatity of exposure
time of day
2. How do you calculate mAs?
time of exposure x kVp
(*)time of exposure x mA
time of exposure x seconds
time of exposure x mA x kVp
time of expsure/mA x kVp
3. Exposure control has which two buttons
mA and kVp
primary circuit and high tension circuit
rotor and kVp
(*)rotor and exposure switch
exposure switch and time
time and mA
4. What does ‘tube current’ stand for?
mAs applied for exposure
kVp setting used for exposure
(*)movement of electrons across the tube
movement of mAs across the tube
movement of voltage across the tube
movement of electrons and energy across the tube
5. what is bremsstrahlung?
process by which mAs is produced when the electrons are suddenly decelerated by coliding with the x-ray tube. determines the maximum accelerating power of the machine
process by which mAs is produced when the electrons are suddenly decelerated by coliding with the x-ray tube. determines the maximum decellerating power of the machine
(*)process by which x-rays are produced when the electrons are suddenly decelerated by coliding with the x-ray tube. determines the maximum penetrating power of the machine
process by which x-rays are produced when the electrons are suddenly decelerated by coliding with the x-ray tube. determines the maximum accelerating power of the machine
process by which x-rays are produced when the mAs is suddenly decelerated by coliding with the x-ray tube. determines the maximum penetrating power of the machine
6. What does the Brems curve indicate?
(*)when electrons decellerate and produce a spike in radiation
when electrons drop into position and produce a spike in radiation
when electrons accelerate and produce a spike in radiation
when electrons drop into position and produce a wave in radiation
7. What is the effect of mA and kVp on the brems spectrum?
(*)inc. kVp=inc energy=dec wavelength
inc kVp=dec energy=dec wavelength
inc kVp=inc energy=inc wavelength
inc kVp=dec energy=inc wavelength
8. what is the purpose of the bucky? choose best answer
to position patient
(*)to position patient and absorb scatter radiation
to position patient and produce compton radiation
to position patient and and catch electrons
9. what happens if you get compton scattering?
better quality image
(*)bad quality image
10. do you use a bucky when imaging knees up, shoulders in?
can use and can also do it without
11. why do we want to absorb scatter radiation? pick best answer
improving penetration of body part
(*)improving contrast of image
improving position of image
improving health of patient (less exposure)
12. what is the average grid ratio and what is it dependent on?
10: 2 and mA
10: 1 and mA
10: 3 and mA
10:2 and kVp
(*)10: 1 and kVp
10:3 and kVp
13. why does the x-ray tube have to be aligned with the bucky prior to patient being positioned?
to save time
to allow for lateral movement
(*)to prevent it from cutting into the grid, causing a “striped like” artifact
to prevent it from hitting the patient
to prevent it from cutting into the grid, causing a “circular” artifact
14. What does the collimator do?
allows operator to view the area being irradiated and protect the patient
allows the operator to restrict kVp and mAs
(*)allows the operator to restrict the field and retain necessary body area
allows the operator to restrict exposure to self
15. how do you position the x-ray tube the proper distance?
16. where are horizontal distances marked on?
(*)on the track of the x-ray tube
on the x-ray tube
on the bucky
on the track of the bucky
17. where are vertical distances marked on?
on the track of the x-ray tube
(*)on the x-ray tube
on the bucky
on the track of the bucky
18. what and how many two emulsions does the x-ray film have?
silver bromide suspended in calcium/2
silver and suspended in bromide/2
silver bromide and phosphate/2
silver bromide and sulphur/2
(*)silver bromide suspended in gelatin/2
bromide and suspended in gelating/2
19. why do we put the film into a cassette?
its very fragile
its very toxic
its very susceptible to heat
it is very susceptible to direct exposure
(*)it is very susceptible to light
20. how many screens does the cassette have, and what are they used for?
21. should you use a larger or smaller cassette up until you gain proficiency?
(*)larger/so you don’t miss any anatomy
larger/ so you can get more body parts in one try
smaller/not to waste any film
smaller/not to overexpose patient too much
22. what is a type of intensifying screen?
yellow emission spectrum
(*)green emission spectrum
red emission spectrum
grey emission spectrum
orange emission spectrum
black emission spectrum
23. what is a type of intensifying screen?
violet emission spectrum
pink emission spectrum
(*)blue emission spectrum
brown emission spectrum
silver emission spectrum
purple emission spectrum
24. how must the cassette be placed into the bucky tray?
tube side facing in
tube side facing to the side being exposed
(*)tube side facing out
tube side facing up
tube side facing down
tube side facing left
25. what do you do if you have a lot of adipose tissue?
expose lying down
compress it upwards
compress it away from the image
26. what are the measurements on the calipers in?and which do you use
(*)both/only use cm
both/only use inches
27. where should the cassettes be located
in the bucky ready always to be used
in between the bucky and the lead screen
behind the lead screen
in a lead lined box in between the bucky and the lead screen
(*)in a lead lined box or behind the lead screen
next to the patient for quick removal
28. what do you align the patient with?
with the tray
(*)with the centre of the cassette
with the x on the bucky
29. what is the best type of lighting in the exposure room?
subdued light with overhead lights in lab on
(*)subdued light with overhead light in lab off
30. what order do you set mA, time, kVp?
mA, time, kVp
kVp, time, mA
(*)mA, kVp, time
time, mA, kVp
time, kVp, mA
31. do you use bucky for? fingers to shoulders, toes to knees?
32. do you use bucky for shoulders in, knees up
33. what do you use on the areas of overlap? knees/shoulders
males:no bucky, females: bucky
(*)males: bucky, females: no bucky
34. What 3 headings can Radiation Protection be broken down into?
Time, speed, distance
time, exposure, speed
(*)time distance, shielding
shielding, exposure, speed
shielding, speed, distance
35. What does HARP stand for?
(*)Healing Arts Radiation Protection Act
Higher Anatomy Radiation Placing Act
Healing Anatomy Radiation Protection Act
Health Arts Radiation Protection Act
36. What do you do if the patient has a tremor?
increase time to be exposed ot make sure you get proper area exposed
(*)cut time down, and increase mA
increase kVp and increase time
increase kVp and Ma
37. What is developer temperature supposed to be?
38. What is a Sensitometric film strip?
(*)strip of ilm exposed by a senitometer, to imprint a scale of gray shading on film
a strip that indicates the level of exposure the patient receives to the operator
39. what is a densitometer used for?
to measure distance of exposure for parts exposed
to measure distance of xray tube to patient
(*)to measure the density on the film
40. What gives you the inherent density on the film?
base + exposure level
(*)base + fog level
fog + exposure level
41. What do you do if you’re working on a child who won’t hold still?
have parent hold child in lap
put child under anaesthecia
use an extra heavy lead cover on child
lay child down on exposure table and use restraints
42. What is the equation for intensity?
Intensity=1/distance x 2
there is no equation
43. Is there a minimum distance that the x-ray tube can be brought to the patient to?
44. What are the specifications of aprons to be used?
any, doesn’t matter
0.25 or 0.5 mm thick
0.25 or 0.6 mm thick
(*)0.25 0r 0.5 mm thick and should god down to knee and come up to thryoid cartilage
0.25 or 0.5mm and should go down to ankle and come up to C1
0.25 or 0.6 mm thick and should go down to knee and up to thyroid cartilage
45. What are Gauntlets
glove to be worn by patient
gloves to be worn by operator of machine
(*)gloves to be worn by person holding patient