Because you don't matter
20-40 kev
What is the voltage for Compton scattering?
Tissue thickness, tissue density, atomic number, and energy of beam
What 4 factors affect attenuation?
The ability to image two separate objects and visually distinguish one from the other.
What is spatial resolution?
Measured by c/kg.
What is mAs?
Primary, secondary, and leakage.
What are considered the 3 types of radiation?
The energy of the incident photons and atomic number of tissue atoms with which they interact.
What probability does photoelectric interaction depend on?
Short wavelength with a high frequency
What is transmission?
Measures the sharpness of an image.
What is line pairs per millimeter?
Difference in adjacent densities.
What is contrast?
Energy, wavelength, and frequency.
What are the 3 varying factors of the EM spectrum?
The probability of photoelectric is ___ proportional to the ___ power of the atomic number of the absorber.
What is directly and third?
Only determined by kVp
What is scales of contrast?
Increase SID, decrease OID, decrease focal spot size.
What are things we can do to get the best recorded detail?
Directly proportional to mAs.
What is exposure?
Source of electrons, vacuum, high potential difference and a target.
What are the 4 things needed for x-ray production?
20-120 kVp
What range does photoelectric interaction occur at?
Bone, muscle, fat, and air
What are factors affecting beam attenuation in the human body?
The unsharp outer edges of an object on the radiograph.
What is penumbra?
Duplicate mAs at different settings.
What is the Law of Reciprocity?
The emission of electromagnetic radiation from a hot body as a result of its temperature.
What is incandescence?
In order for photoelectric interactions to occur, the incident x-ray photon must be ___ or ___ to the inner-shell binding energy of the tissue atoms involved.
What is greater than or equal?
Intensity is to quantity as ____ is to quality.
What is penetration?
Decrease SID and increase magnification.
What is a decrease in spatial resolution?
What are the prime factors we control?
By angling the face of the anode target a large AFS can be maintained and a small EFS can be created.
What is the Line-focus principle?