Test 1 Flashcards
negative end
cathode
positive end
anode
what is an x-ray?
- electromagnetic energy
- heterogenous invisible beam that passes through body tissue
different _______ determines how to interact with matter.
energies
differential absorption
Difference in absorption by different body tissues
radiographic density
blackness
radiographic density appears _______ on radiograph?
black metallic silver
radiographic density and anatomic density relationship
inversely related
radiographic contrast
degrees of contrast btwn black and white
why do we have contrast in image? How does it happen?
Allows to see something.
When the xray encounter dense material like bones.
What would the film look like if all of the x-rays interacted with the emulsion and the film was then processed?
it would be black
Is it really the x-ray that interacts with the film emulsion to produce the image?
no
What color of light do rare earth crystals typically emit?
greenish- yellow
x-rays have ______ wavelength = _____ energy
short wavelength
high energy
another name for single x-ray beam
photon
what determines energy of x-ray?
Amount of energy of each electron. (Short wavelength high energy)
mass of x-ray
no mass
charge of x-ray
no charge
electromagnetic energies in order of energy (relative to x-ray)
x-ray Gamma UV Visible light infrared microwaves radio waves
remove an electron from its orbit around a nucleus
ionize
energies in electromagnetic spectrum that have ability to ionize
x-ray
gamma
What makes an x-ray photon higher energy than a microwave?
short wavelength
high frequency
wave equation
velocity (speed of light) = wavelength x frequency
gamma ray
high energy radiation that doesn’t have mass