Dental radiography Revision test 1 Flashcards
What would be used to protect an xray film from being bent?
Black paper
On examination the dentist suspects that the patients’ canines are impacted. which x-ray will the most likely requested you take?
upper standard occlusal
A patient attends the dental surgery as they are experiencing pain in the lower right second molar tooth. The dentist suggests using one that is directly connected to the computer. Which type of image receptor would you use?
Charged couple device image receptor
Added aluminium filtration removes the soft energy x-rays that are of no benefit to the film. They do this before the x-rays exit the tubehead. Their thickness depends on the kV of the x-ray generating equipment being used. If the x-ray generating equipment being used was above 70 kV what would the thickness of the aluminium filter be?
2.5mm
If the x-ray machine is operating at above 60kV what should the focus to skin distance be?
200mm
You have just processed a periapical radiograph and you note that the image is coned. What could have caused this film fault?
Positioning of the tubehead
A dental x-ray is made up of various shades of grey, how many shades of grey are there from black to white on a dental x-ray?
256
What year were the current UK legislation guidelines relating to the Ionising Radiation (Medical Exposure) Regulations published?
2017
What is the name of the document that should be kept by the x-ray machine?
Local rules
You have just chemically processed a bitewing and the dentist is showing it to the patient. What would provide the optimal viewing conditions?
Viewing box
How many hours of radiography and radiology CPD do the GDC recommend that dental nurses carry out in a 5 year cycle?
5 hours
You are taking a DPT, what rotates around the back of the patients head?
Tubehead
Why would you take a lateral cephalometric radiograph?
To evaluate the facial growth and development
You are developing a BW using an automated processor. What is the final compartment that the film passes through?
Water
When assessing a digital radiograph, what is the minimum size of a flat screen monitor that should be used?
15”
Radiographs are…..
2D representations of 3D objects
when taking a radiograph which factor determines beam quality?
Kilovoltage
which interaction results in pure absorption?
Photoelectric effect
you should be standing at least 2 metres from…?
the tubehead
what energy does an incoming xray photon need to eject an inner shell electron?
69.5kV
you need to keep ALARP, which component will provide the maximum dose reduction to the patient?
rectangular collimator
Inside the tubehead there are various components, which metal helps to remove heat?
Copper
you have recently manually processed a BW but is very light- what has cause this?
Insufficient time in developer
what is pH of developing solution?
10.5
what is the maximum annual dose limit of non-classified workers?
6mSv
An atom is made up of a nucleus which contains protons and neutrons surrounded by electrons in specific orbits or shells. Which shell is the of diagnostic importance?
K shell
Which biologic effect will definitely happen with a specific high dose of radiation?
deterministic effect
what is the atomic number of lead?
82
what is Z?
the atomic number
