Chapter 7 Study Questions
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| The approximate percentage of electron kinetic energy that is converted to x-ray photon energy in the x-ray tube is... | show 🗑
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| The majority of the electron kinetic energy in the x-ray tube is converted to what form of energy? | show 🗑
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| show | An incident electron reacts with the force field of the nucleus, causing the electron to slow down, diverting the electron’s course; the electron loses energy and changes direction; the energy lost in the "braking" is a bremsstrahlung photon.
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| show | An incident electron interacts with an inner shell electron, knocking out the inner shell electron and continuing in a slightly different direction, which creates a hole in the inner shell, making the shell unstable.
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| show | The reaction of electrons dropping into the holes created during a characteristic interaction until there is only a hole in the outer shell.
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| show | The average primary beam photon has a keV energy of only about 30-40 percent of the kVp.
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| What effect does changing mAs have on the total x-ray emissions spectrum? | show 🗑
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| show | When kVp is changed, the result is a change the # of higher-energy photons, as well as in the amplitude of the emission graph.
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| Characteristic Peak | show 🗑
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| Incident Electrons | show 🗑
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| show | The actions that take place when the electrons strike their target or focal spot.
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| show | When the high-speed electrons from the cathode strike and anode target in an x-ray tube.
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| How do x-rays and gamma rays differ in their production? | show 🗑
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| show | Almost the speed of light.
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| How far is the anode from the cathode? | show 🗑
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| What is the symbol for incident e- in a drawing? | show 🗑
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| show | wave arrow
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| show | energy
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| Kinetic Energy | show 🗑
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| show | Process in which e- in an atom are moved to a higher energy state without actually being removed from the atom; produces heat
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| Ionization | show 🗑
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| What are other some names for incident electrons? | show 🗑
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| show | heat
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| Where do all target interactions occur? | show 🗑
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| What are the 3 possible products of target interaction? | show 🗑
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| show | The quantity of e- available at the cathode.
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| show | The quality (energy) of e- ~~~which, in turn, controls the number and quality of photons (high-energy;penetrating)~~~
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| show | --1.high Z#--2.high melting point--3.similar e- binding energies
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| Bremsstrahlung is German for what? | show 🗑
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| show | Brems target interactions
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| In characteristic interactions, the e- must drop where for a photon to be produced within the diagnostic range? | show 🗑
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| show | 1000+
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| What is intensity also referred to as? | show 🗑
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| How would you increase e- kinetic energy? | show 🗑
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| When e- kinetic energy is increased, what 2 things are also increased? | show 🗑
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| show | to provide a large number of e- with high kinetic energy focused to a small spot on the anode
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| The e- traveling from the cathode to the anode constitute what? | show 🗑
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| show | kinetic energy
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| show | an orbital e- or the nuclear field of a target atom
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| show | X-rays produced when a projectioe e- is slowed and its direction is changed by the electric field of a target atom
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| show | when an outer-shell e- fills an inner-shell void
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| show | tungsten
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| Characteristic photons will not compose any of the useful beam until kVp is what? Why? | show 🗑
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| show | discrete
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| show | continuous
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| show | Characteristic x-rays
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| show | Bremsstrahlung x-rays
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| show | amplitude (total # of x-rays emitted)
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| The farther to the right a spectrum is.... | show 🗑
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| Between 80 and 100 kVp you can expect the primary beam to be produced by what types and percentages of x-rays? | show 🗑
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| show | 70
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| show | brems
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| show | --1.higher amplitude--2.increased #of photons--3.increase in high energy photons
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| show | brems and characteristic.
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| What determines the energy of a photon created in a brems interaction? | show 🗑
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| How do you determine the energy of a characteristic x-ray? | show 🗑
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| show | a direct brems interaction with the nucleus; maximum energy photon
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| As the electron gets closer to the nucleus in brems, what occurs? | show 🗑
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