Waves of extrmely high energy composed of individual units on energy called photons.
How fast does Xray travel
The speed of light 186,000 miles per second
Xray beam can be limited in size by lead shutter like structures
Where is flourescence used?
used in intensifying screens
What is the effect of photographic emulsion
creates the image
What is Ionization
the ability to divorce electrons from matter
photons bouncing off objects (our enemy)
the positive end of the tube
negative end of the tube
Filament end of the tube
slanted end of the tube
For upright xrays which end on the tube is down
For upright xrays which end of the tube is up
Starting with closest to the wall what are the four elements behind the body when taking an xray
lead barrier, film cassett (electronic image detector), grid, wall bucky
Turns generator on but no xrays is produced yet
Stands for milliamperage. Controls how much the cathode filament will be heated to "boil off" electrons
Labeled "S" for seconds. controls how long the filaments will be heated.
stands for kilovoltage. controls the positive charge which draws the electrons from the cathode filaments over to the anode taget. The higher the kV setting the more force.
Initiates the exposure, will shut off according to the settings you have set.
bucky on /bucky off switch
turns of the reciprocating grid (may not have one)
dial which you can turn to compensate for electrical drain on the circuit (may not have one)
to step up the line voltage
What is the job of the xray?
to turn the film black
xrays are affected by three factors what are they?
amount of mAs and kV for the beam, density of the body part, and thickness of the body part (centimeters)
all electromagnitic energy propagating through the atmosphere (light, microwave, tv, radio).
electromagnetic radiation that is of whort enough wave lengths and high enough energy to pass through solids and divorce electrons from atoms (xrays)
a substance (isotope) that itself emits radiation (plutonium not xrays)
3 types of radiation
Primary - radiation exiting from the tube through the cullimator
Remnant - radiation going through the body to reach and expose the film
unnecessary - leakage or scatter
material through which xrays can readily pass (looks black on film i.e. air or gas)
material dense or thick enough so that xrays cannot readily pass through it. (looks white on film i.e. metal or bone)
central ray or center of the primary beam (X of collimator light)
Source-to-image distance. How far tube (anode) is from film
Object-to-film ditance. How are patient/part is from film
a froup of radiographs taken of one body region on one occasion. (Ex: lumbar dtrudy, or cervical study)
a study taken at a subsequent time (different date) for purpose of re-eval)
a study of left and right comparable parts taken on one occasion
surface against which the patient stands
direct digital radiography
aur tight holder for film
wheets of cardboard coated iwth flourescent material, increasing the amount of exposure of the film by emitting visible light when the fluorescent crystals on the screens are struck by x-rays
what info needs to be listed on the ID card
Name of Practice
bdate or age
Lead markers that mark the left or right side of the patient (some show recumbant and upright)
What data should be logged when taking xrays
Patients Name, age and sex
Date of xrays
Which xrays were taken, including retakes
technique factors used
any changes from standard protocol
What 3 types of laws govern the practice of any health care profession in any state?
What is a statute?
A bill introduced into the state legislature, passes the house and senate and signed by the governor. Also known as RCW (revised code of WA)
What is am Administrative rule?
Each state has various department and boards that are authorized to pass admin rules. (Chiropractic Quality Assurance commission and Medical Quality Assurance commission are two of these departments) Also known as WAC's
What is Case Law?
These are cases that have set precedents.
Failure to possess and exercise skill, care and learning is called what?
Why was the WAC Radiographic standards put in place?
because of concerns about over-radiation and unnecessary xray exposure.