Exam Style Questions 1 Flashcards
True/False: Thermionic emission is the process in which electrons are generated in a cloud surrounding the cathode?
True
The emulsion layer in traditional radiography film does what?
Contains photosensitive silver halide crystals
A disadvantage on non screen film in flex-cassettes sometimes used in digital radiography?
Poor film-film screen contact
Inverse square law used in radiography exposure calculations is due to which physics law?
The penumbra effect
True/False: Barium has a high atomic number making it appear black on a radiograph?
False
Before conducting GI study contrast radiography, it is important to…..?
Patient will need an emema
What should be considered when drying wet processed radiography film?
- remove frames during processing
- dust free environment
- avoid film-film contact
CT can be used to gain optimal images of?
Soft tissues with body cavities such as the thorax
True/False: In wet processing, development is also known as ‘reduction’ and is the separation of AgBr into the two chemical elements Silver and Bromide. This darkens the x-ray film?
False
What must a nurse ensure when recovering the patient from myelography?
Keep head elevated
The function of the subbing layer in radiography film is?
Adhesive
The risk of anaphylaxis is reduced when using what?
Barium enema, Low osmolar non-ionic iodine, C02
In the MRI machine, the RF coil is responsible for what?
Emitting and collecting non ionising radiowaves
The light unit within indirect digital radiography that generates light when exposed to x-ray photos is what?
Scintillation layer
A grid factor is?
the multiplication factor used to calculate the new mAs if a grid is needed
Orthochromatic screen film is sensitive to what colour light emitted from the intensifying screens?
Blue and green - rare earth screens
Waste disposal regulations for wet radiography chemical disposal, states records of disposal must be kept for how long?
3 yrs
True/False: Intensifying screens contain phosphorescent crystals that glow when exposed to x-ray photons?
True
Correct dark room light colour suitable for calcium tungstate, blue light emitting rare earth screen is?
Brown or orange
True/False: A laser in the CR reader, scans the imaging plate resulting in the release of trapped electrons?
True
What is the period of time before the x-ray image taken using CR imaging cassette begins to deteriorate?
2 hrs
True/False: Computed radiography still uses a type of cassette which contains an imaging plate rather than a traditional film.
True
What are the three types of stationary grid?
Parallel, pseudo-focused, crossed
What is the replacement of the traditional x-ray film in direct digital radiography?
Flat Panel Detector
What is the purpose of the anode in the tube head?
Produces positive charge attracting electrons from the cathode
