Radiology Lab Flashcards
What is the function of the lead blocker and what do you have to keep in mind when taking X-rays
The function is for identification of children and do not place any relevant patient body part in the corner
What is the function of the foam pressure pads in the cassette
Ensure close contact of film screens
What are two ways to break cassette
Physical damage, leakage of fluid into cassette
What is the function of the intensifying screens and what are they contain
Convert x-ray it’s a photons that are responsible for most of the film exposure 95%. Contain phosphor crystals that is responsible for this conversion
How do we clean and care for the cassettes or screens
Keep closed, free of dust hair or artifacts. Avoid scratching when inserted or removing filmed. Clean with mild soap and water
What is important to know when selecting an appropriate screen
decision based on speed and efficiency
What is the direct exposure film used for
Used if needed better detail better quality image. No cassette required
How should film be stored and handled
In a box in vertical position
What is KV P in which transformer does it require
Kilovoltage peak and a step up transformer
What is mA and which transformer does it need
Milliamperage and step down transformer
What is the function of the x-ray tube height adjustment lock
To prevent The tube from moving and allows you to convert from table top to cassette
What is S I D
Source image distance
How do you place the body in relation to the anode and cathode
Thicker portion of the body towards the cathode
What are the three things that happens when an x-ray strikes an object
Transmission, scatter, absorption
How many intensifying screens do you have per cassette
Two
What do the intensifying Screens contain
Phosphor crystals
What happens when phosphor crystals are hit by x-rays
They fluoresce
What are the advantages of the automatic developer
Shorter time than manual development. Standardized so it is a consistent quality
How do you keep the Rock rollers and guides clean in an automatic processor
Send a scout through to started. Use cleaning film to cover all rollers wait for a beep and then put the next one and
How often do you replace the chemical solutions in an automatic processing
Once a month
What are the four common dental films use and which two are used at Vanier
- We used 2 for small dogs and cats and 4 for dogs
Which side of the film is placed facing the x-ray tube
The white side towards the tube
What is the purpose of the dimple in the film and which direction to place it with respect to the animal
The dimple helps identify where the film was. We place the dimple rostrally
Can the dental X-ray beam be collimated
No it cannot
On the control panel for the dental x-ray unit which buttons control the following settings: film type, time and KV P
Film type: people buttons
Time: film type settings
KVP: tooth settings
What are the three steps to the developing process for the dental x-ray unit
Developer water and fix
How long do you develop the film for
30 seconds
How long do you rinse the film for
Three shakes
How long do you fix the film for
60 seconds
Within the protective cover of the film which one is the actual film
The middle one
What are the two reflective sheets around the film
Lead foil backing to reduce scatter radiation
Why do you do quality-control for film
To minimize radiation exposure to patients and personal. To produce good quality radiographs. To decrease number of repeated films
Name three functions of the Cassatt
Rigid lightproof and prevent exposure to light but allow x-rays to penetrate. Film holder. Contains intensifying screens that convert x-rays in the visible light
