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Radiography 1

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Part 1 Radiography Quiz containing questions from Introduction to Intra-oral Radiography and Radiographic films/processing.
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Quiz by 0 9, updated more than 1 year ago
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Created by 0 9 almost 8 years ago
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Resource summary

Question 1

Question
Where should the front edge of a bitewing radiograph be aligned?
Answer
  • Mesial edge of the upper first pre-molar
  • Distal edge of the upper first pre-molar
  • Mesial edge of the upper second pre-molar
  • Distal edge of the upper first molar

Question 2

Question
Which type of bitewing radiography is more commonly used?
Answer
  • Horizontal
  • Vertical

Question 3

Question
In a bitewing radiograph, the film should be positioned [blank_start]perpendicular[blank_end] to the occlusal surfaces of the teeth / central x-ray beam.
Answer
  • at 90°
  • at 45°
  • at 30°

Question 4

Question
When may a bitewing radiograph be prescribed?
Answer
  • Assessing occlusal and interproximal caries of multiple teeth
  • Assessing crowns of pre-molars and molars on one side of the mouth
  • Monitoring periodontal status
  • Assessing individual teeth and their apical tissues

Question 5

Question
What % of radiographs must be of excellent quality, with no errors in exposure, positioning or processing?
Answer
  • 70%
  • 80%
  • 50%
  • 30%

Question 6

Question
What colour of envelope is used to request a radiograph in the X-ray department?
Answer
  • White
  • Green
  • White/Purple

Question 7

Question
A _______ envelope is used to request a radiograph on clinics
Answer
  • Green
  • White
  • White/Purple

Question 8

Question
What size of film is used when taking anterior periapical radiographs?
Answer
  • Size 0
  • Size 2
  • Size 4

Question 9

Question
Size 4 film is used for what type of radiograph?
Answer
  • Occlusal
  • Posterior periapical
  • Bitewing
  • Anterior periapical

Question 10

Question
What size of film is used when taking posterior periapical radiographs?
Answer
  • Size 2
  • Size 4
  • Size 1
  • Size 0

Question 11

Question
Posterior periapicals and Bitewing radiographs are both taken using the same size of film.
Answer
  • True
  • False

Question 12

Question
The white side of the X-ray film faces [blank_start]toward[blank_end] the X-ray tube.
Answer
  • towards
  • away from

Question 13

Question
Radiographs should be prescribed to screen for disease.
Answer
  • True
  • False

Question 14

Question
Select the correct indications for use of a peri-apical radiograph
Answer
  • Periodontal status
  • Post-operative evaluation of implants
  • Apical infection
  • Endodontic treatment
  • Interproximal caries
  • Occlusal caries

Question 15

Question
Which type of X-ray film holder is used when using the bisecting angle technique?
Answer
  • Rinn Snaparay
  • Rinn anterior holder
  • Rinn endoray
  • Hawes-Kwikbite

Question 16

Question
The paralleling periapical technique is [blank_start]reproducible[blank_end] since the X-ray film and tube are held in place with a holder.
Answer
  • reproducible
  • not reproducible

Question 17

Question
In the paralleling periapical technique, the tooth and sensor are in contact.
Answer
  • True
  • False

Question 18

Question
In both the ideal and parallelling periapical technique, which two things are parallel?
Answer
  • Sensor
  • Long axis of the tooth
  • Occlusal surface of the tooth
  • Free gingival groove

Question 19

Question
In the ideal technique, the tooth and sensor are in contact.
Answer
  • True
  • False

Question 20

Question
The best way to describe the bisecting angle technique is...
Answer
  • Poorly reproducible
  • Easy to set up
  • Highly reproducible
  • A type of technique used when taking bitewing radiographs

Question 21

Question
The angle between which two features is bisected to reach the bisected angle?
Answer
  • Long axis of tooth
  • Long axis of sensor
  • Occlusal surface of tooth
  • Alveolar crest of bone

Question 22

Question
Where is the central X-ray beam directed in the bisecting angle technique?
Answer
  • Apex of the tooth
  • Long axis of the tooth
  • Pulpal horns
  • Pulp chamber of the tooth

Question 23

Question
What does ALARP stand for?
Answer
  • As low as reasonably practicable
  • As little as radiographically possible
  • As low as radiationally possible
  • Administer local anaesthetic for radiation protection

Question 24

Question
Poor contrast may be as a result of...
Answer
  • Poor processing
  • Wrong kV used
  • Exposure to daylight
  • Insufficient exposure

Question 25

Question
Shorter roots can be caused by [blank_start]too much[blank_end] vertical angulation.
Answer
  • too much
  • too little

Question 26

Question
An overexposed image is darker than an optimally exposed image.
Answer
  • True
  • False

Question 27

Question
Which side of the sensor faces the X-ray tube?
Answer
  • White side
  • White/Purple side

Question 28

Question
Which side of the sensor faces away from the X-ray tube?
Answer
  • White/Purple side
  • White side

Question 29

Question
For peri-apical radiographs, the embossed dot should aim towards the...
Answer
  • Crown of the teeth
  • Apex of the root
  • Pulp chamber

Question 30

Question
For bite wing radiographs, the embossed dot should aim towards the...
Answer
  • Upper teeth
  • Lower teeth
  • Apex of the lower teeth

Question 31

Question
What type of film is used for extra oral radiography?
Answer
  • Direct
  • Indirect

Question 32

Question
What type of film is used for intra oral radiography?
Answer
  • Direct
  • Indirect

Question 33

Question
Direct film is primarly responsive to
Answer
  • X-ray photons
  • Light photons

Question 34

Question
Indirect film is primarly sensitive to
Answer
  • Light photons
  • X-ray photons

Question 35

Question
Indirect film does not have embossed dot therefore L+R markers are used in the casette.
Answer
  • True
  • False

Question 36

Question
Which of these are components used in intensifying screens?
Answer
  • Calcium Tungstate
  • Lanthanum
  • Gadolinium
  • Silver halide
  • Yttrium

Question 37

Question
Intensifying screens reduce patient dose but consequently produce a lower resolution image.
Answer
  • True
  • False

Question 38

Question
If a direct film is placed the wrong way round, there is no way of telling that an error has been made.
Answer
  • True
  • False

Question 39

Question
Label the image of the direct X-ray film
Image:
f2ba5918-2345-473d-8182-6407362ba0c7 (image/png)
Answer
  • Protective gelatin layer
  • Emulsion (silver halide)
  • Adhesive
  • Plastic base

Question 40

Question
When X-ray photons strike the silver halide emulsion of the film, what happens to the silver halide emulsion?
Answer
  • It is sensitised
  • It is excited
  • It is neutralised
  • It is oxidised

Question 41

Question
When X-ray photons hit the silver halide emulsion, does this form the visible or latent image?
Answer
  • Latent image
  • Visible image

Question 42

Question
The embossed dot should face toward the operator and x-ray tube.
Answer
  • True
  • False

Question 43

Question
In a CCD X-rays hit the [blank_start]scintillation[blank_end] layer above the matrix/array and are converted to [blank_start]light[blank_end] photons. This creates a [blank_start]charge packet[blank_end] which represents the [blank_start]latent[blank_end] image. This is transmitted as an [blank_start]analogue[blank_end] voltage then converted by an analogue-digital converter to the digital image.
Answer
  • scintillation
  • light
  • charge packet
  • latent
  • analogue

Question 44

Question
Instead of film, what do PSPP systems use?
Answer
  • Barium fluorohalide phosphor
  • Silver halide
  • Gadolinium
  • Lanthanum

Question 45

Question
For a PSPP system, the barium [blank_start]fluorohalide[blank_end] phosphor layer absorbs the X-ray photons and stores them (X-rays not [blank_start]attenuated[blank_end] by patient). The image plate is then placed in a laser reader and this causes the stored X-rays to be released as light. A [blank_start]photomultiplier[blank_end] tube then detects this light energy and converts it into a voltage which is then interpreted by a computer and displayed as a digital image.
Answer
  • fluorohalide
  • attenuated
  • photomultiplier

Question 46

Question
Select the disadvantages of digital film
Answer
  • Loss of quality if printed
  • Image alteration possible
  • Expensive to initially implement
  • Higher dose
  • Slower processing

Question 47

Question
Select the advantages of digital film
Answer
  • Lower dose
  • Faster processing
  • Easy transfer
  • Inexpensive to implement
  • Less security required in software

Question 48

Question
Digital X-ray processing: 1. [blank_start]Analogue[blank_end] voltage converted to numerical [blank_start]digital[blank_end] signal 2. Each pixel given x,y coordinate and [blank_start]number[blank_end] 3. The computer then allocates the number a shade of [blank_start]grey[blank_end] scale
Answer
  • Analogue
  • Digital
  • digital
  • analogue
  • number
  • hash
  • grey
  • the visible spectrum

Question 49

Question
A number 0 given to a pixel represents a black shade on the grey scale. What does this mean about X-ray attenuation of the patient?
Answer
  • The patient has not attenuated any of the X-rays
  • The patient has fully attenuated the X-rays

Question 50

Question
A number 255 given to a pixel represents a white shade on the grey scale. What does this mean about X-ray attenuation of the patient?
Answer
  • All of the X-rays have been attenuated by the patient
  • Some of the X-rays have been attenuated by the patient
  • None of the X-rays have been attenuated by the patient

Question 51

Question
Which factors affect the final resolution and size of a digital X-ray image?
Answer
  • Number of pixels
  • Size of pixels
  • Number of shades available from grey scale
  • Type of pixel
  • X-ray attenuation by patient

Question 52

Question
Put in the correct order the processing of X-ray film 1. [blank_start]Development[blank_end] 2. [blank_start]Fixation[blank_end] 3. [blank_start]Washing[blank_end]
Answer
  • Development
  • Fixation
  • Washing

Question 53

Question
During development of X-ray film, sensitised silver halide ions are reduced to black metallic silver. What part of the image does this produce?
Answer
  • Black/Grey part
  • White part

Question 54

Question
Too long development of X-ray film leads to an image that is...
Answer
  • Too dark
  • Too pale

Question 55

Question
What is the name of the active ingredient in the developing solution used to develop X-ray film?
Answer
  • Hydroquinone
  • Camphoroquinone
  • Gamma-methacryloxypropyltrimethoxysilane

Question 56

Question
During fixation of the X-ray film image, what substance is used to remove unsensitised silver halide ions?
Answer
  • Ammonium thiosulphate
  • Copper sulphate
  • Sodium hexafluoride

Question 57

Question
The removal of unsensitised silver halide ions results in which parts of the image?
Answer
  • Transparent/White
  • Black/Grey

Question 58

Question
The time taken to clear unsensitised silver halide ions is known as the...
Answer
  • Clearing time
  • Washing time
  • Fixation time
  • Oxidation time

Question 59

Question
The X-ray film is fixed for ........ the clearing time
Answer
  • Double
  • Triple
  • Half

Question 60

Question
The fixation solution is alkaline and thus contamination with the alkaline developer solution is not a problem.
Answer
  • True
  • False

Question 61

Question
The X-ray film emulsion is ........... by aliminium chloride.
Answer
  • Hardened
  • Softened
  • Fixed

Question 62

Question
After fixation, X-rays films are washed to remove residual chemicals. What chemical is used to wash them?
Answer
  • Water
  • Ammonium thiosulphate
  • Hydrogen peroxide
  • Ethanol

Question 63

Question
In manual processing there is sometimes an extra washing stage - when is this completed?
Answer
  • Before development
  • Between development and fixation
  • Between fixation and washing
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