Radiology Quiz

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1. What does the timer control?

(*)duration of exposure

quality of exposure

quatity of exposure

mA

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

overpenetrated image

underpenetrated image

white image

black image

10. do you use a bucky when imaging knees up, shoulders in?

yes

(*)no

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?

(*)use FFV

use FFD

use FFS

use LVS

use LVD

use LVV

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?

2/reduce exposure

4/reduce exposure

(*)2/intensify image

4/intensify imag

1/increase exposure

2/increase exposure

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

smaller/reduce cost

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?

nothing

shift it

expose lying down

compress it upwards

(*)compress it

compress it away from the image

26. what are the measurements on the calipers in?and which do you use

cm’s/use these

inches/use these

both/use these

(*)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?

no light

bright light

subdued light

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?

yes

(*)no

32. do you use bucky for shoulders in, knees up

(*)yes

no

33. what do you use on the areas of overlap? knees/shoulders

bucky

no bucky

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

nothing

increase kVp and increase time

increase kVp and Ma

37. What is developer temperature supposed to be?

90-100 F

50-80 F

93-98 F

93-96 F

(*)92-96 F

90-96 F

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

fog+ h&d

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 pig-o-stat

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=1xdistance^2

Intensity=1/distance

Intensity=1/distance^2

Intensity=1/distance^4

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?

(*)Yes

No

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

 

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    Radiology News said:
    July 2, 2012 at 8:35 pm

    Carestream launches DR features
    Carestream has introduced software for three of its DRX digital radiography systems.

    These features are available for order and will be shipping by mid-July with new DRX-1 Systems, DRX-Mobile Retrofit Kits and DRX-Transportable Systems, Rochester, N.Y.-based Carestream said. Existing customers will be able to upgrade existing systems with new software.

    New features include:

    •A companion image (from the original exposure) for pneumothorax visualization that accentuates the appearance of free air in the chest cavity. A new ICU package also includes Tube and Line Visualization and automatic image display in the correct orientation.
    •Pediatric-specific image processing that selects default parameters based on patient size.
    •Software for chest imaging outlines areas in the image to alert a technologist if a retake might be needed due to incorrect positioning. Vendor-neutral IEC exposure index values allow technologists to see if they are within the acceptable exposure range.
    •Prior Image Review software allows a user to query and retrieve prior images of the same patient from a PACS to review techniques and positioning.

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