Physics chps 8-10
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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A radiographic image is a result of | show 🗑
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beam attenuation occurs when | show 🗑
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t/f: x-rays have the ability to eject electrons (ionization) from atoms within anatomic tissue | show 🗑
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show | ejection of electrons from atoms
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3 primary processes occur during x-ray interaction with anatomic tissue | show 🗑
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show | compton
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total absorption of the incoming x-ray photon is a result of | show 🗑
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scattering of incoming x-ray photon is a result of | show 🗑
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Scatter radiation reaching the IR provides...and creates...on the radiograpgh | show 🗑
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Complete absorption of incoming x-ray occurs when it has enough energy to... | show 🗑
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attenuation | show 🗑
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show | incoming photon interacts with atom causing it to become excited, x-ray does not lose energy but changes direction
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show | low energy, below diagnostic range
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coherent aka | show 🗑
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coherent energy in kvp | show 🗑
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Compton effect | show 🗑
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show | scatter, recoil
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differential absorption | show 🗑
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show | attenuated beam leaves patient
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exit radiation composed of | show 🗑
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show | remove(eject) inner shell electron.
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show | more
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photoelectron | show 🗑
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show | exit radiation
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Scattering | show 🗑
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does transmission radiation interact with atomic structures | show 🗑
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show | differential absorption
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loss of some energy from xray beam as it passes through tissue being imaged | show 🗑
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process of removing an electron from an atom | show 🗑
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show | absorbed, photoelectric interaction
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coherent regarding direction and interaction | show 🗑
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show | scattered, compton interaction
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photoelectric deals with ... shell | show 🗑
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t/f:coherent changes direction | show 🗑
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show | secondary electron, compton electron
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show | no
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t/f: compton interaction can occur within all diagnostic xray energies | show 🗑
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show | true
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show | false, density does not matter
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show | true
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show | 1.02 meV
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meV of photodisintegration | show 🗑
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show | coherent scattering
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show | exit radiation
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show | fog (washes out image)
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show | fewer, increased
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if kVp goes up, mAs... | show 🗑
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if kVp goes down...%, mAs... | show 🗑
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efficiency of xray production increases as ... increase | show 🗑
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show | quality
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show | kVp and filtration
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show | beam quality/kVp
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Half value layer of beam measures beam ... | show 🗑
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show | kVp
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main purpose of added filtration | show 🗑
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show | compton scattering, photoelectric absorption
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thompson aka | show 🗑
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show | compton
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Xray interaction that involves ejection of K-shell electron | show 🗑
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As kVp ... probability of photoelectric absorption ... | show 🗑
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complete absorption of incident xray photon with ... effect | show 🗑
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show | pair production
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show | photodisintegration
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show | absorption and scattering
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show | air
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show | of its high atomic #
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at energies below 40 KeV, predominant xray interaction in soft tissue and bone is | show 🗑
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Find following: 200 mA, .05 sec, 70 kVp ... mA, .01 sec, 80 kVp | show 🗑
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show | 400 mA x .06 sec = 24
answer = .12 sec
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show | radiation quality
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increase in mAs will increase ... | show 🗑
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purpose of wedge filter | show 🗑
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show | remove low energy xrays
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show | photoelectric effect
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show | decrease patient dose
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radiographic quality is combination of | show 🗑
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visibility is aka | show 🗑
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show | geometric properties
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show | proper balance of radiographic density and radiographic content
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radiographic density -controlled by | show 🗑
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a change in mAs results in direct change in | show 🗑
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show | exposure time
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if mA increases, sec ... to maintain density | show 🗑
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show | kilovotage
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show | increases
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% of mAs needed to see changes on film | show 🗑
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% of kVp needed to see changes on film | show 🗑
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if SID increases, density ... -unless | show 🗑
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changing SID and/or film-screen speed requires an adjustment in ... to maintain density | show 🗑
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show | increased density, decreased resolution
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radiographic contrast is combined result of -affects ... of recorded detail | show 🗑
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a radiograph with few densities but great differences among them is said to have ... -described as ... | show 🗑
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show | low contrast
-long-scale contrast
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kilovoltage has an inverse relationship with | show 🗑
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high kVp will create an image with ... contrast and low kVp will create and image with ... contrast | show 🗑
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show | fog,
contrast
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exposure factors may need to be modified for ... patients | show 🗑
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increased collimation = ... density | show 🗑
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show | density and contrast
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show | contrast negatively, density
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film speed increases, mAs ... and density ... | show 🗑
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show | decreases, more grays
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total absorption | show 🗑
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show | barium
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more mAs = more ... | show 🗑
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show | mAs
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show | quantity
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show | mAs
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if distance decreases by 1/2, intensity goes up by ... | show 🗑
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intensity is always ... when distance is decreased | show 🗑
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show | decreases
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show | goes up by 2
(20 mAs -> 40 mAs)
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show | kVp
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optical density is aka | show 🗑
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if kVp increase by 15%, mAs increases by ... % | show 🗑
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intensity formula | show 🗑
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beam quality affected by 2 | show 🗑
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beam quality NOT affected by ... 2 | show 🗑
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show | kVp
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quality improves by increased | show 🗑
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show | quality increases, quantity decreases
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show | none
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show | 10 kVp or less
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coherent interaction | show 🗑
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interaction where atom is ionized (outer shell kicked out) | show 🗑
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T/F: with compton interaction, electron retains most of its energy | show 🗑
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direction compton can be directed | show 🗑
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show | photoelectric (absorption)
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show | photodisintegration and pair production
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show | 10 meV
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show | 1.02 meV
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show | high atomic number
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greatest mAs density in body | show 🗑
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show | compton
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differential absorption depends on 3 | show 🗑
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show | absorption and scatter
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show | radiation that went through patient
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xrays transmitted w/o ... contribute to image | show 🗑
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absorbed xrays contribute to ... radiation | show 🗑
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show | less motion/geometric blur
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speed = less ... and more ... | show 🗑
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density | show 🗑
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show | quantity (number) of xrays
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an increase in mAs will result in an increase in | show 🗑
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the controlling factor for density is ... because ... | show 🗑
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show | mAs
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show | increased by 100% or decreased by 50%
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an increase in kVp will result in an ... in density because of | show 🗑
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show | 15%
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show | SID
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an increase in SID will ... density | show 🗑
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show | beam and compensating
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show | 2.5 Al
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beam filtration filters | show 🗑
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show | a decrease in density
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show | differences in tissue thicknesses
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an increase in the thickness of a compensating filter will result in ... in density | show 🗑
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show | kVp
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show | further distance
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filtration measured in | show 🗑
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amount of inherent filtration | show 🗑
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inherent filtration found in | show 🗑
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show | greatest intensity on cathode side of tube
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show | form of body
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high contrast | show 🗑
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high contrast aka | show 🗑
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show | radiograph with large number of densities but little differences among them
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long scale contrast aka | show 🗑
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show | object to distance distance
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show | grays
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show | overall blackness produced on image after processing
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short scale contrast | show 🗑
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show | high contrast
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SID | show 🗑
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show | grays
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show | scatter radiation
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show | short
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show | long
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show | 2.5 mm Al
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if using barium you need to adjust kVp by ... it | show 🗑
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show | 70 or below
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if filament temperature increases, there is ... mAs | show 🗑
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square law | show 🗑
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show | useful xrays
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show | high quality
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show | chest xrays
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more distance needs more ... but ... doesnt change | show 🗑
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