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Dental Radiography 5th Edition By Joen Iannucci 9780323297493 ALL CHAPTERS .
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TEST BANK For Dental Radiography: Principles and Techniques 6th Edition by Joen Iannucci & Laura Jansen Howerton
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Dental Radiography 5th Edition By Joen Iannucci 9780323297493 ALL CHAPTERS .
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Test Bank For Dental Radiography 5th Edition By Joen Iannucci9780323297493 ALL CHAPTERS .
What are the contents of a film packet? - ANSWER: Plastic Wrapper, Outer Covering, Lead Foil, Black
Paper, Film
What is radiolucent? - ANSWER: Dark areas on radiograph - less density
What temp should the developer and fixer be kept? - ANSWER: 18-22 degrees
What is radiopaque? - ANSWER: White areas on x-ray - greater density
What does a lateral oblique show? - ANSWER: Posterior portion of one side of the mandible including
ramus and angle
What is attenuation? - ANSWER: absorption + scattering
What is scattering? - ANSWER: change in photon's direction
The continuous spectrum occurs when? - ANSWER: Electron passes close to the neucleus of the atom
What is braking radiation known as? - ANSWER: Continuous spectrum
Why does an electron jump from one energy shell to another and emits xray photons? - ANSWER:
Characteristic Spectrum
When taking a lateral oblique is the patients head and cassette parallel? - ANSWER: No
What is the maximum diameter of a collimator? - ANSWER: Rectangle - 40x50 mm
Round - 60mm
What is the maximum focal spot to skin distance (FSD) for an intra oral? - ANSWER: 200mm for sets
operating above 60 kV
The risk of an adult developing a fatal malignancy from a modern bitewing? - ANSWER: 1 in
200,000,000 (2 hundered million)
The silver hallide crystals turn what colour during the development stage? - ANSWER: Black
Deterministic effects... - ANSWER: Will happen if the body is exposued to a high dose of radiation
What is Ionisation? - ANSWER: The process of removing the electron from the shell
Compton effect - ANSWER: Scattering and absorption
What does IRMER stand for? - ANSWER: Ionising Radiation (Medical Exposure) Regulations
If taking bitewings using a film with tabs what angle is the tubehead? - ANSWER: 5-8 degrees
What is the penumbra effect? - ANSWER: Blurring of the edges of the image.
What causes coning? - ANSWER: Collimator angulation is not central to the film, only partially exposed
What causes blurred images? - ANSWER: Patient or collimater moved during exposure
, What causes a transparent film or faint image with overlying pattern? - ANSWER: Film placed the
wrong way around - lead foil pattern super imposed on the film
How thick should the aluminium filtration be for an intra oral unit working at 70 kV? - ANSWER:
2.5mm
A yearly dose of background radiation in the UK is approximately... - ANSWER: 2.7 mSv
What causes elongation of image? - ANSWER: Collimator angulation too shallow
What causes foreshortening of image? - ANSWER: Collimator angulation too steep
What causes a fogged film? - ANSWER: Exposed to light before the exposure
What causes a blank film? - ANSWER: X-ray machine not switched on or broken
How much tooth tissue will be demineralised before it can be seen on an Xray? - ANSWER: 30-40%
What is used to protect the film from being bent? - ANSWER: Black paper
Which X-ray would you take to confirm upper impacted canines - ANSWER: Upper standard occlusal
Which image receptor would you use when a sensor is connected directly to the computer? -
ANSWER: Charged couple device image receptor
How many shades of grey are there on a dental X-ray? - ANSWER: 256
What year was the current IRMER published? - ANSWER: 2017
How many radiography CPD hours does a dental nurse need over the 5 year cycle? - ANSWER: 5
What rotates around the back of the head on an OPT? - ANSWER: Tubehead
Why would you take a ceph? - ANSWER: Facial growth and development
What is the final compartment on a automated processor? - ANSWER: Water
What is the minimum size of the monitor when assessing a digital radiograph? - ANSWER: 15 inches
What factor determines the quality of the beam? - ANSWER: Kilovoltage
Which interaction results in pure absorption? - ANSWER: Photoelectric effect
What energy does an incoming X-ray photon need to eject an inner shell electron? - ANSWER: 69.5 kV
You need to keep the scattered dose ALARP which component will provide maximum dose reduction
to the patient? - ANSWER: Rectangular collimator
Which metal removes heat inside the tubehead? - ANSWER: Copper
A manually processed X-ray is very light - what caused this? - ANSWER: Insufficient time in the
developer
What is the pH of the developing solution? - ANSWER: 10.5
Atom is made up of what? - ANSWER: Nucleus
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