Help!
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| In fluoroscopy, pulse rate is the number of exposures per second? T/F | True
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| When using magnification mode, the fluoroscopes needs to set the exposure factors higher to compensate for the reduced diameter useful input phosphor: T/F | False
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| When CCD is exposed to light, it generates and briefly stores light energy? T/F | True
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| Is considered a primary beam? | Fluoroscopic x-ray beam
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| Digital fluoroscopy is improved by using: | Charge-coupling device(CCD)
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| Type of exposure control switch is used in fluoroscopy? | Dead man’s foot pedal
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| Output phosphor | Absorbs electrons and emits light
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| Input phosphor | Absorb x-ray and emits light, convert to visible light
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| Photocathode | Bonded directly to the input phosphor
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| Made of cesium Iodide, needle shape: | Input phosphor
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| Essentially the sum total of air Kerma over the exposed area of the patients body surface? | Dose area product
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| Types of ionizing radiation that produce virtually the same biologic effect for equal dose in body tissue: | X-rays, beta particles, and gamma rays
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| The image intensifier was introduced in the: | 1950s
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| Photoemission occurs at the: | Photocathode
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| The____is found along the entire length of the image intensifier? | Electrostatic focusing lenses
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| The recording device that “photographs” the image off of the output phosphor is the: | Film cameras for spot filming
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| The detectors to produce high-quality fluoroscopic images, they must able to: | Respond quickly, respond many times in a row, application specific integrated
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| An expression of the ability of an image intensifier tube to convert x-ray energy into light energy and increase the brightness of the image in the process is the? | Brightness gain
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| When operated in magnification mode, the electrostatic lenses have___of a negative charge | More
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| A disadvantage of using magnification mode during fluoroscopy is: | Patient receives additional dose
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| Customary and SI units for absorbed dose? | Rad; gray
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| Two improvements to fluoroscopy brought with image intensifier? | Brightened, reduce radiation
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| Amount of radiation to be safe? | None
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| First radiation worker to die of radiation? | Clarence Dally
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| Job of image intensifier? | Increase brightness
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| 5 main components of image intensifier? | Input phosphor, photocathode, electrostatic focusing lenses, accelerating anode, output phosphor
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| Customary and SI units used for occupational radiographer monitoring : | REM; Sievert
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| When the electron beam is sweeping the anode, if the electron beam and light from the output phosphor are incident on the same time,____through the target to the signal plate: | Electrons are transmitted
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| Amount of light emitted by the input phosphor is proportional to: | Number of x-ray received
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| Purpose of glass envelope of image intensifier? | Creates vacuum
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| Process of photocathode responding to light from input phosphor: | Photoemission
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| Job of focusing lenses? | Negative charged lenses, helping focusing
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| Automatic adjustment of kVp and/or mAs as needed to maintain contrast and density of the fluoroscopic image? | Automatic brightness control (ABC)
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| Customary and SI units for exposure? | Roentgen; air kerma
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| Requires more radiation to produce quality fluoroscopic images? | Conventional image intensifier
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| Output phosphor is made of: | Zinc cadmium sulfide
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| The image intensifier is located in: | Inside the fluoroscopic tower
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| Photocathode is made of? | Cesium and antimony compounds
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| Accelerating Anode is designed to: | Set the electron stream in motion at a constant velocity
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| Allows imaging of the movement of internal structures. It’s use of a continuous or pulse beam of x-ray to create images of moving internal structures that can be viewed on a monitor: | Fluoroscopy
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| The amount of energy per unit mass absobed | Absorb dose
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| The basic unit of electrical charge | Coulomb
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| SI quantity used to express the energy | Air kerma
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| To adjust the quantity of equivalent dose: | Effective dose
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| To adjust the value of the absorbed dose | Equivalent dose
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| A dose of radiation lower individual | Threshold dose
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| Imprecise measure of the quantity | Exposure
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