Ch 1-7
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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Matter is measured in | show 🗑
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show | atoms and molecules
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The formula ___ is the basis for the theory that led to nuclear power | show 🗑
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show | radiowaves, microwaves, ultraviolet, infrared, visible light, xray, gamma
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show | kinetic energy
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show | ionization
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Ionizing radiation is capable of ___ electrons from atoms as it passes through matter | show 🗑
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Xray are forms of | show 🗑
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show | diagnostic xray
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We are exposed to 20-90 mR/yr of ionizing radiation from | show 🗑
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show | mass, length, time
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Radiation exposure is measured in | show 🗑
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Today, radiology is considered a safe occupation because of elective | show 🗑
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show | as low as reasonably achievable
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Xray filtration is used to absorb | show 🗑
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The term atom was first used by the | show 🗑
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show | John Dalton
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show | atom
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A positively charged nucleus surrounded by negatively charged electrons in well-defined orbits is the | show 🗑
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The fundamental particles of an atom are the | show 🗑
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show | protons in the atom
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show | zero; neutral
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The binding energies or energy levels of electrons are represented by their | show 🗑
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Atoms with the same number of protons as another, but a different number of neutrons is an | show 🗑
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show | molecules
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The losses or gain of one of more electrons is an | show 🗑
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The number of electrons in an electron shell is calculated with the formula | show 🗑
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A neutral atom has the same number of | show 🗑
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show | K
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show | Z
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The atomic number equals the number of | show 🗑
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The difference between xrays and gamma rays is their | show 🗑
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show | particulates/particles
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show | frequency, wavelength, velocity, and amplitude
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The smallest quantity of any type of electromagnetic radiation is a | show 🗑
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The velocity of all electromagnetic radiation is | show 🗑
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show | frequency
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The ___ of electromagnetic radiation is constant | show 🗑
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If the wavelength of a beam of electromagnetic radiation increases by a factor of 2, the frequency must decrease by | show 🗑
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The intensity of radiation decrease in _______ to the square of the distance of the object from the source | show 🗑
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The reduction of radiation intensity due to scattering and absorption is called | show 🗑
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The intensity of radiation on an object is reduced with distance because the radiation is | show 🗑
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If intensity of light from a flashlight is 4 millilumens (m/m) at 3 ft using the inverse square law, what will it be at 6 ft? | show 🗑
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The diagnostic range of xray energy is | show 🗑
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show | frequency
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show | energy (kVp)
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show | radiowaves
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Gamma rays are produced in the | show 🗑
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show | shortest wavelengths
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The smallest unit of electrical charge is the | show 🗑
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Electrification occurs only through the movement of | show 🗑
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A battery is a source of | show 🗑
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show | current and a magnetic are produced
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show | sinusoidal line
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show | direct current
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show | generator
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show | V=IR
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Electrical power is measured in | show 🗑
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show | insulators
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When a group of dipoles are aligned, they create a | show 🗑
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show | 1/60 second
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show | tesla
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show | magnetic field
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Like magnets poles _____ and unlike magnetic poles | show 🗑
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show | diamagnetic
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show | iron core
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The three main parts of an xray imaging system are the | show 🗑
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The operating console contains circuits that are | show 🗑
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show | line voltage compensators
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show | autotransformer
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show | one winding
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The ____ circuit provides electrons for the xray tube. | show 🗑
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The most accurate type of times is the | show 🗑
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The automatic exposure control (AEC) terminates the exposure when sufficient radiation reaches the | show 🗑
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show | 500-1000 times
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A diode allows electrons to flow from | show 🗑
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show | positive
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Full-wave rectified, three-phase units provide an xray beam at ___ pulses per second | show 🗑
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Voltage across the xray tube is most constant with | show 🗑
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Most mammography units operate with | show 🗑
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show | 100%
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show | cost
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show | single phase
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The most widely used support structure of the xray tube is the | show 🗑
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_____ coating within the tube can cause arcing | show 🗑
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The negative side of the xray tube is the | show 🗑
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The cathode holds the | show 🗑
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The most common cause of tube failure is | show 🗑
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show | tungsten
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show | thermonic
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The ___ motor works by electromagnetic induction to turn the anode | show 🗑
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When electron bombard the target ___ of their energy is converted to heat. | show 🗑
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show | tungsten alloy
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show | focal spot
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The size of the effective ___ decreases as the target angle decreases | show 🗑
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High capacity tube rotors revolve at | show 🗑
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show | cathode
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show | cathode
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Tube ____ can occur from long exposures | show 🗑
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The stators are ___ the glass envelope | show 🗑
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___ or ___ radiation is produced from rebounding electrons | show 🗑
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The heel is caused by the ___ of the anode | show 🗑
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The effective focal spot size is smaller than the | show 🗑
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show | pitting
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show | anode
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show | heat
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the production of heat at the anode is directly proportional to | show 🗑
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The efficiency of xray production increases as kVp | show 🗑
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show | 1%
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Electrons interaction at the inner-shell of the target atoms produce | show 🗑
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show | k shell xrays
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show | 57 keV
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Most of the xrays produced at the target are | show 🗑
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At 55kVp ___ of the xrays produced are bremsstrahlung | show 🗑
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show | nucleus
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show | energy
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The amplitude of the emission spectrum is lower with a ___ generator than with a three-phase generator | show 🗑
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A 15% increasing kVp is equivalent to doubling the | show 🗑
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