chanpter 7,8,9 (bushong)
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| show | by removal of a k-shell electron
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| show | heat
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| show | projectile electrons interact with target atoms
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| Bremsstrahlung radiation is produced by? | show 🗑
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| show | cathode
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| show | removal of inner shell electron
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| The area under the curve of the xray emission spectrum represents what? | show 🗑
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| show | both characteristic and bremsstralung xrays
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| show | target material
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| show | projectile electron energy
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| show | xrays emitted from the xray tube
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| show | the number of xrays versus energy
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| To construct an xray emission spectrum, one most know what? | show 🗑
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| What characteristic is reduced as xray energy increases? | show 🗑
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| When the mAs is increased, xray quantity does what? | show 🗑
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| When distance is increased, xray quantity at that distance does what? | show 🗑
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| show | decreases
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| show | Increase in kVp
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| Another meaning of "xray quantity" is xray: | show 🗑
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| show | Radioactivity
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| To maintain a constant optical density, what percentage increase in kVp should be accompanied by a reduction of one half in mAs? | show 🗑
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| show | HVL (half value layer)
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| show | kVp
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| The HVL (half value layer) is affected principally by a change in what? | show 🗑
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| show | Radiation quality
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| show | low energy xrays are removed more readily than high energy xrays
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| show | xray quantity
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| show | quality
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| What will enhance xray beam quality? | show 🗑
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| What is attenuation? | show 🗑
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| The inherent filtration in a general purpose radiographic xray tube is usually equivalent to what? | show 🗑
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| The purpose of a wedge filter in diagnostic radiology is to produce what? | show 🗑
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| show | 1.very low energy keV levels
2.10 keV and lower
3.little importance in diagnostic radiology
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| Compton's Effect | show 🗑
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| show | 1.occurs in the diagnostic range when an incident photon is totally absorbed during ionization of an inner shell e
2.incident photon disappears, and k shell e, now called photoelectron, is ejected from atom
3.produces characteristic radiation
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| Pair Production | show 🗑
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| Photodisintegration | show 🗑
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| show | radiolucent
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| show | when there is a k shell vacancy and then the L shell fills it, and then the M shell fills the L shell vacancy and so on.
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| Which interactions are important in the diagnostic area? | show 🗑
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| What are most of the xray's energy levels going to be at? | show 🗑
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| show | Is a graph of the xray tube output demonstrating the # of xrays vs. the energy of the xrays
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| show | continous
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| show | discrete
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| show | 1.increasing kV(quality and quantity increase)
2.increasing mA(quantity changes)
3.increase in filtration(quality and quantity increase)
4.target with higher atomic #(only time characteristc line chance,shifts right)
5.change from 1 phase to 3 phase
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| What does adding filtration do to the beam? | show 🗑
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| show | a HVL of 2.5mm Al total filtration is required
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| show | increased HVL
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| show | 1.Inherent: glass,oil (built into tube), 0.5mm Al
2.Added: aluminum sheets, 2.0mm Al
3.Compensating: provide variation in intensity across the xray beam
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| show | 1.atomic #
2.mass density
3.xray energy
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| show | varying degrees of xray absorption in tissues, also determines the contrast of image
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| show | 1.fat
2.soft tissue
3.lung
4.bone
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| show | 1.air
2.iodine
3.barium
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| List other materials from lowest to highest effective atomic number? | show 🗑
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| What are the xrays called that pass thru the body, unaffected, to the IR? | show 🗑
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| show | Compton effect
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| Which interaction produces scatter radiation? | show 🗑
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| Which interaction produces secondary radiation? | show 🗑
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| show | Photoelectric effect
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| Which interaction is important to the tech in terms of dose received? | show 🗑
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| Which interaction proves Einstein's equation E=mc2? | show 🗑
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| show | most energy of projectile e's are converted into heat, 99%
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| show | interactions near the nuclei of the atom
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| show | interactions with e's in the inner shell of an atom
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Created by:
Chrslarsen
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