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Radiology > Intro to radiological interpretation and reporting > Flashcards

Intro to radiological interpretation and reporting Flashcards

1
Q

What is a bitewing radiograph used for

A
  • the detection of caries mainly
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2
Q

What part of the mouth does a bitewing radiograph show

A

Shows the upper and lower teeth of one side of the mouth, right left or front kinda thing

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3
Q

What can you see in an anterior periodical radiograph

A

The whole crown and root of the maxillary/mandibular teeth (think its just be incisors)

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4
Q

What can you see in posterior periodical radiographs

A

The whole root and crown of the posterior teeth

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5
Q

What does the upper standard occlusal and the lower 90 (true) occlusal radiographs show you

A

Root and crown of a lot of the maxillary/mandibular teeth, i think there’s a focus on the anteriors

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6
Q

What are occlusal radiographs usually used for

A
  • Fractures
  • foreign bodies
  • salivary calculus
  • expansion
  • pathology
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7
Q

What do panoramic radiographs show

A

The entire oral cavity

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8
Q

What are panoramic radiographs bad for

A

Carie detection

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9
Q

What are panoramic usually used for

A
  • Perio but don’t have as much detail as multiple peri-apical images
  • can see unerupted teeth
  • pathology and effect of it on other structures
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10
Q

What is the radiation dose for a panoramic radiograph with and without the salivary glands

A

7-14mSV without

16-25 mSV - with

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11
Q

Why might you choose a half-panoramic over a panoramic radiograph

A

reduced radiation dose

only used when its not needed to compare one side to the other

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12
Q

What are the 3 categories of radiograph quality

A

1, 2 and 3

1 is the best

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13
Q

Name some features of an optimum viewing condition when taking a radiograph

A
  • Need and even, uniform and bright light on the screen
  • Need a dark and quiet viewing room
  • could use magnifying glasses
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14
Q

When is a wardray viewing box used

A

It has an additional central bright light source that is normally used for overexposed dark films

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15
Q

What is an SDI X-ray reader

A

It is an intra-oral film reader with built in magnification, this is a magnifying device

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16
Q

Name a procedure where an SDI X-ray reader can be used and why

A

Root canal to see the fine details of obturation

17
Q

What decides the amount of information of an image, size of an image file and resolution of image

A

the number and size of the pixels and the number of shades of grey

18
Q

What picture is produced if you have a very dense object

A

X ray beam is absorbed a lot in the object and the image is white (radiopaque)

19
Q

What is a radiolucent image

A

This is when you take an x ray for a low density object and the x rays pass through and cause a black image

20
Q

What is the main limitation in the interpretation of a radiograph

A

that you are trying to interpret a 2D image of a 3D object

21
Q

What questions relating to technique should you have to critically assess radiographic quality

A
  • Which technique?
  • How much distortion?
  • Foreshortened/elongated?
  • Rotation/Asymmetry?
  • Image resolution and sharpness?
  • Light fogging?
  • Artefact shadows?
22
Q

What questions relating to exposure factors should you have to critically assess radiographic quality

A
  • Radiograph correctly exposed for specific reason it was requested?
  • Is it too dark/overexposed
  • Is it too light/underexposed
  • How good is the contrast?
23
Q

What is contrast

A

This measures the degree of density between 2 areas on a radiograph.
Contrast makes it easier to distinguish areas of interest.
Higher voltage

24
Q

What questions relating to processing should you have to critically assess radiographic quality

A
  • Is the radiograph correctly processed?
  • Too dark/overdeveloped?
  • Too pale/underdeveloped?
  • Is it underfixed (dirt with emulsion still present?)
25
Q

What things should you look for in which order when interpreting a radiograph

A
  1. Normal Anatomy
  2. Errors/artefacts
  3. Pathology
26
Q

Is the lamina dura radiopaque or radiolucent

A

radiopaque

27
Q

What is the lamina dura

A

It is a thin layer of dense cortical bone surrounding the root.

28
Q

What is the alveolar crest

A

This is the top of the alveolar process, an extension of the mandible and maxilla that holds the tooth sockets

29
Q

What is a normal distance between the alveolar crest and cemento-enamel junction

A

Not more than 1.5mm from the cement-enamel junction

Radiology (6 decks)

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