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Radt 1300

study guide test 1

atomic number the number of nuclear protons in an atom unique to each element; also know as z number.
atomic weight the mass of an atom of an element; specifically the average mass of an atom of an element as it occurs in nature that is expressed in atomic mass.
matter anything that has mass and takes up space.
radiology the study of x-ray
radiograph image of an x-ray
kilovoltage the electrical difference between the anode and cathode of the radiographic tube. In radiography the x-ray tube peak voltage during an exposure is measured in kilovolts.
diode 2 electrons one positive and one negative.
volt unit of electrical force, needed to push a current (flow of electrons) unit of potential difference.
frequency the number of waves that passes a particular point in a given time frame. Second hertz #of cycles
wavelength the distance between two successive (identical) points on a wave. Distance traveled
intensity exposure rate per unit area.
Who discovered x-rays and when? Wilhelm Conrad Roentgen, November 8, 1895
energy (electrons) very high in waves and related to frequency.
velocity frequency x wavelength
ems electromagnetic spectrum
IR image receptor
sid source to image receptor distance
kVp kilovoltage
cr computed radiography
what is the difference between a radiologist and a radiographer? A radiologist is a doctor who is specially trained to interpret diagnostic images. A radiographer takes the x-rays and also conducts diagnostic tests.
what are the two main distances used in a x-ray department? 40'' and 72''
why should the term technician never be used? Because it means some one who is trained in one task
where on the electromagnetic spectrum do x-rays fall? the high side
explain the relationship between frequency and wavelength. inversely proportional
explain the relationship between photons and frequency. directly proportional
name the types of energy. kinetic and electromagnetic
when x-rays are produced, how much heat and how much x-ray is produced? 99% heat and 1% x-ray
explain the dual particle theory of x-ray. travels through space as a wave
who determined the mathematical equation used to describe the relationship between photon energy and frequency? max planke
what does kev mean? kilo electron volts
electrons travel from to in x-ray production. negative to positive
when x-rays are absorbed prior to reaching the image receptor, what happens as far as the image is concerned? creating white on the image
Created by: Dawn6585