chanpter 7,8,9 (bushong)
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| show | by removal of a k-shell electron
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| What is produced when the projectile electron excites an outer shell electron? | show 🗑
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| show | projectile electrons interact with target atoms
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| show | conversion of projectile electron kinetic energy to electromagnetic energy
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| In bremsstrahlung xray production the projectile electron is from what? | show 🗑
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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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| show | xray wavelength
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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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| show | 15%
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| show | HVL (half value layer)
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| show | kVp
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| show | kVp
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| show | Radiation quality
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| As filtration is added to an xray beam, what happens? | show 🗑
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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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| show | 0.5mm Al
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| The purpose of a wedge filter in diagnostic radiology is to produce what? | show 🗑
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| Coherent Scattering | show 🗑
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| Compton's Effect | show 🗑
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| Photoelectric effect | show 🗑
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| Pair Production | show 🗑
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| show | 1.high energy xray photons, above 10meV
2.absorbed directly by the nucleus
3.emits a nucleon or other nuclear fragments
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| show | radiolucent
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| Cascading Effect | show 🗑
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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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| Xray emission spectrum | show 🗑
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| show | continous
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| show | discrete
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| What factors can cause a shift or change in the position of the emission spectrum? | show 🗑
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| show | it hardens the beam
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| What filtration is required for a diagnostic unit that operates up to 150 kV? | show 🗑
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| Added filtration = what? | show 🗑
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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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| Differential absorption? | show 🗑
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| show | 1.fat
2.soft tissue
3.lung
4.bone
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| List contrast media from lowest to highest effective atomic number? | show 🗑
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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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| When higher energy exposures are made which interaction decreases? | show 🗑
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| show | Compton effect
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| Which interaction produces secondary radiation? | show 🗑
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| Which interaction gives image contrast? | show 🗑
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| show | Compton effect
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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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| How are Brems radiation produced? | show 🗑
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| show | interactions with e's in the inner shell of an atom
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