Term
| "type of xray tube designed to turn on and off, making short exposures" |
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Definition
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Term
| How will moving image intesifier closer to patient during fluoro affect patient dose? |
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Definition
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Term
| how will moving image intesifier closer to patient during fluoro affect image quality? |
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Definition
| Increase image quality due to decreased OID |
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Term
| Batteries in mobile xray power what? |
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Definition
| "xray tube, machine locamotion, braking mechanism" |
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Term
| "Capacitor discharge, what does battery power?" |
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Definition
| xray tube only. Must be recharged after each use |
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Term
| electron cloud in xray tube is: |
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Definition
| a product of thermal emission |
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Term
| what causes pittiing and small melts on anode's focal track |
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Definition
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Term
| photostimulable phospor plate is used for what? |
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Definition
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Term
| where is step down transfromer located? |
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Definition
| in secondary or high voltage side of xray circuit |
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Term
| where is step up transformer located? |
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Definition
| in primary or low voltage side of xray circuit |
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Term
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Definition
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Term
| what target angle and focal spot size combination produces the greatest heat loading capabilities? |
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Definition
| "small target angle, big actual focal spot size" |
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Term
| "pinhole camera, star pattern, and slit camera are used to test what?" |
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Definition
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Term
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Definition
| proportional. Vs/Vp=Ns/Np |
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Term
| patient dose during fluoro is affected by |
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Definition
| "distance between patient and input phosphor, amount of magnification, and tissue density" |
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Term
| Spinning top test used to evaluate: |
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Definition
| "timer acurracy, rectifier failure" |
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Term
| rectifier failure will result in image of: |
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Definition
| half of the dashes missing |
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Term
| Will a smaller or larger diameter input screen improve spatial resolution |
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Definition
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Term
| circuit device that permits electrons to flow in only one direction |
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Definition
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Term
| What occurs during brems radiation? |
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Definition
| electron approaching positive nuclear charge changes direction and loses energy |
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Term
| what converst mechanical energy to electrical energy? |
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Definition
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Term
| what converts electrical energy to mechanical energy? |
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Definition
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Term
| terminates the x-ray exposure once IR is correctly exposed |
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Definition
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Term
| star test pattern used to test? |
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Definition
| focal spot size and magnification resolution |
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Term
| whats diffeerence in mAs will be needed if using 3 phase 12 pulse equiptment instead of single phase |
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Definition
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Term
| whats diffeerence in mAs will be needed if using 3 phase 6 pulse equiptment instead of single phase |
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Definition
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Term
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Definition
| "readilly dissipates heat, high melting point, high atomic number" |
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Term
| voltage ripple for 3 phase 6 pulse |
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Definition
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Term
| voltage ripple for 3 phase 12 pulse |
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Definition
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Term
| deposition of vaporized tungsten on inner surface of x-ray tube glass window: |
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Definition
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Term
| What controls voltage by varying resistance |
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Definition
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Term
| When using a smaller field in a dual field image intensifiers: is the image more magnfified? Brighter? |
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Definition
| "It is more magnified, it is dimmer, and FOV is smaller" |
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Term
| What is used in fluoro replacing image intensifier's television camera tube? |
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Definition
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Term
| in which equipt does peak KVP decreases during exposure |
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Definition
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Term
| Characteristics of xray tube |
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Definition
| "target materal has high atomic number, cathode assembly receives both low and high voltages" |
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Term
| device that directs light emitted from image intensifier to view aparatus |
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Definition
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Term
| "when you select KVP on control panel, what device is adjusted" |
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Definition
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Term
| what contributes to inherent filtration? |
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Definition
| "xray tube glass window, xray tube port window" |
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Term
| disadvantage of moving grid |
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Definition
| "long exposure, increased patient dose. " |
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Term
| double focus xray tubes have two: |
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Definition
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Term
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Definition
| 120 dashes/1 second on normal |
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Term
| design characteristics of xray tube targets contribute to high heat capacity: |
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Definition
| "fast rotation of anode, large diameter of anode, large size of focal spot" |
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Term
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Definition
| "QF for three-phase high freq. 1.45, 12-pulse 1.41" |
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Term
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Definition
| "QF for three-phase 6-pulse 1.35, single phase 1.0 " |
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Term
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Definition
| "gadolinium, lanthunum, yrttium" |
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Term
| star and wye configurations related to what? |
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Definition
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Term
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Definition
| inversely proportional Ip/Is = Ns/Np |
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Term
| capacitor-discharge mobile |
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Definition
| "grid controlled tube, provides direct-current output" |
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Term
| which image intensifier mode will yield highest patient dose |
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Definition
| small diameter because it will be dim and will require increase in mAs |
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Term
| advantage of collimator over diaphram and cones |
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Definition
| "varying field size, more efficient beam restriction. But does not clean up more scatter" |
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Term
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Definition
| phototimer charged by flourscent screen behind IR or ionization chamber in front of cassette |
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Term
| Increased in heat of filament results in : |
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Definition
| "more electrons released, thus more mAs" |
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