X-Ray Production
Tungsten coil that boils off electrons
What is the filament?
The invisible image, before the IR is processed.
What is a latent image?
Directly controls the radiographic quality.
What/who is the radiographer?
Decreases patient exposure, but lengthens the scale of contrast.
What is increasing kVp?
Measurable difference between two adjacent densities.
What is contrast?
A target with a beveled edge; it spins to dissipate heat.
What is the anode?
A piece of film with a processed image.
What is a radiograph?
Measure of electrical current passing through the x-ray tube.
What is milliamperage (mA)?
Cassette-based, digital systems have this type of reusable imaging plate inside.
What are photo-stimuable phosphors (PSP)?
The quantity factor (blackness).
What is density?
After electrons strike the target, only 1% of the productions is actually radiation; the remaining 99% is this.
What is heat?
It's when crystals emit light (after being struck by x-ray photons).
What is luminesce?
Controls the penetrating ability of the x-ray beam.
What is kilovolt peak (kVp)?
Radiation affect on the individual.
What are somatic affects?
Creates a useless density (fog) on the film.
What is scatter radiation?
On the cathode end, this piece helps to concentrate/aim the electrons before they are accelerated toward the target.
What is the focusing cup?
Made of plastic or polyester, coated with crystals, mounted inside the cassette.
What is an intensifying screen?
Increases proportionately to mAs.
What is film density/IR exposure?
Uses amorphous selenium as a detector material, captures the x-ray beam and converts it to an electronic, digital signal.
What is direct radiography system?
Magnification is an example of this.
What is size distortion?
These are necessary for the production of x-radiation.
What are a vacuum, source of electrons, method to accelerate the electrons and a method to stop the electrons?
In A CR system, if insufficient light is emitted from the phosphors, it produces an image that is grainy also known as...
What is Quantum mottle or Quantum noise?
A 2-step process where x-ray photons are first converted to light.
What is Indirect Capture?
3 best defenses against radiation exposure (in order of importance).
What are time, distance, and shielding?
Affect the (amount of) divergence of the beam
What is the focal spot size?