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Question | Answer |
---|---|
What type of x-ray tube is designed to turn on and off quickly, providing multiple short, precise exposures? | Grid-controlled Lange Q&A pg 273 |
What principle do these circuit devices operate on: autotransformer and choke coil? | Self-induction Lange Q&A pg 273 |
The image is magnified when using the small or large field in a dual field image intensifier? | Small Lange Q&A pg 274 |
The minimum response time of an automatic exposure control (AEC)uses its ______ exposure time | shortest Lange Q&A pg 274 |
The electron cloud within the x-ray tube is the product of a process called: | thermionic emission Lange Q&A pg 274 |
What does repeated, frequent overloading do to the anode's focal track? | Causes pitting Lange Q&A pg 274 |
A parallel-plate inoization chamber receives a particular charge as x-ray photons travel through it. This is the operating principle of what device? | AEC Lange Q&A pg 275 |
Do kV and HVL have a direct or indirect relationship? | direct Lange Q&A pg 276 |
What converts electrical energy into mechanical energy? | Motor Lange Q&A pg 276 |
To terminate the x-ray exposure once the IR is correctly exposed is the job of the _______. | Phototimer Lange Q&A pg 276 |
An electron approaching a positive nuclear charge changes direction and loses energy in which production of radiation? | Bremsstrahlung Lange Q&A pg 277 |
What type of device is used to measure focal spot size and spatial resolution? | slit camera Lange Q&A pg 276 |
What is the voltage ripple for a three phase-six pulse rectified generator? | 13% Lange Q&A pg 277 |
Which device receives the remnant beam, converts it into light, and then increases the brightness? | Image Intensifier Lange Q&A pg 277 |
Give three components of the image intensifier. | Photocathode, focusing lens, accelerating anode Lange Q&A pg 278 |
In digital fluoroscopy, what has taken place of the image intensifier's televesion camera tube? | The charge-coupled device Lange Q&A pg 278 |
________ involves reciprocal motion of the x-ray tube and film. | Tomography Lange Q&A pg 278 |
In fluoroscopy, the ABC is used to adjust the kVp and _____. | mA Lange Q&A pg 278 |
When kV is selected on the control panel, ________ is adjusted. | the autotransformer Lange Q&A pg 278 |
What is the device that directs the light emitted from the image intensifier to various viewing and imaging apparatus? | the beam splitter Lange Q&A pg 279 |
The x-ray tube in CT is most likely to be associated with what? | a pulsed x-ray beam Lange Q&A pg 280 |
A device used to ensure reproducibility radiographs, regardless of tissue density variations, is the _____. | Phototimer Lange Q&A pg 281 |
The device used to change alternating current into unidirectional current is the _____. | Solid state diode Lange Q&A pg 281 |
Which part if an induction motor is located outside the x-ray tube glass envelope? | Stator Lange Q&A pg 283 |
Which part if an induction motor is located within the x-ray tube glass envelope? | Rotor Lange Q&A pg 283 |
What mode of a trifield image intensifier will result in the highest patient does; 25 in., 17 in., or 12 in.? | The 12 in. mode Lange Q&A pg 284 |
Fractional focus tubes, with a 0.3-mm focal spot or smaller, have special application is which of the following? magnification radiography, fluoroscopy, tomography, or image intensification | Magnification radiology Lange Q&A pg 284 |
An increase in the heat of the filament will cause the mA to what? | increase Lange Q&A pg 284 |
The filtering effect of the x-ray tube's glass envelope and its oil coolant are referred to collectively as what? | inherent filtration Lange Q&A pg 288 |
What device is best used to determine the accuracy of the x-ray timer? | the spinning top Lange Q&A pg 288 |