who are the three people that may have taken the first radiograph in the US?
Name the type of radiation produced when a bombarding electron from the tube filament dislodges a K shell electron of the tungstontarget
(vs. General or bremsstrahlung which represents the majority of radiation produced and occurs when high speed electrons are stopped or slowed down by the tungsten atoms)
When an entering high speed electron is slowed down there is a loss of energy that is given off as xray or ______.
Heat - mainly generating heat, very little xrays actually produced
The desired type of radiation is called ________ and may only occur above ____ kVP with a tungston target
The ________ is the negative electrode in the x-ray tube and contains the tungsten wire and focusing cup
The _________ is the positive electrode in the x-ray tube and contains the target and copper stem/radiator
When the filament in the x-ray tube is heated electrons from metal escape. This boiling off of electrons is called ________ ________.
The purpose of the cathode is to
supply electrons neccesary to produce xrays. Also contains the tungsten wire/fillament and focusing cup.
If a herringbone pattern appears on a developed film x-ray what has occurred?
the clinician put the film packet in the XCP backwards
what is the main difference between manual and automatic processing?
with automatic processing the film goes directly from the developer to the fixer W/OUT a rinse
For manual processing of xrays there is a narrow range of temperature.
a. What is this range?
b. what is optium?
a. 60-75 degrees F
b. 68 degrees F
Motion of the tube head, even if slight, will produce a larger surface area of the focal spot (and magnification of the image) resulting in a
For manual processing of xrays, processing time is dependent on __________
the temperature of the solutions.
Developer: This converts exposed silver halide crystals into black metalic sillver...
Elon & hydroquinone (developer)
Developer: This keeps the reducing agents from developiong enexposed silver halides to produce fog.
Potassium bromide (restrainer)
What is the name of the solution that stops the development process and hardens and removes silver halide crystals?
Fixer: This clears away the unexposed silver bromide crystals
Sodium thiosulfate (cleaning solution)
If starbursts appear on a pano film what error has the clinician made
removing the film from the packet too quickly causing static electricity
What is the SLOB rule?
- if object in question shifts in the SAME direction it is on the lingual
- If object in question shifts in the opposite direction it is on the buccal
the amount of radiation that comes out of the xray and unit and reaches the person is called?
which tissues are most sensitive to radiation?
the MPD (maximum permissible dose) for occupationally exposed people is
5 rem/yr = .05 microsieverts OR 5,000 millirem = 50millisieverts