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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.
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Question
Answer
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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