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RAD 107 chapter 6&7
RAD 107 week 1
| Question | Answer |
|---|---|
| kVp determines the _________ of the x-ray beam and mAs determines the __________ of the x-ray beam. | quality and quantity |
| Where is the autotransformer located in the circuit? | Control console |
| The x-ray beam generated by the circuit with the _______ voltage ripple has the _______ quantity and quality. | lowest; highest |
| Where is the step-up transformer located in the circuit? | High voltage section |
| Which of the following is the most common cause of tube failure? | Vaporized tungsten |
| The heel effect is caused by the ___________. | anode angle |
| Extrafocal or off-focus radiation is produced from ____________. | rebounding electrons |
| The _______ is/are inside the glass envelope. | anode |
| The _______ is/are located outside the glass envelope. | stators |
| Voltage across the x-ray tube is most constant with _________________. | high frequency generators |
| The most accurate type of timer is the ________ timer. | electronic |
| The difference in the waveform between the primary and secondary sides of the high voltage transformer is _________. | amplitude |
| Variations in power distribution to the x-ray machine are corrected by the ____________. | line voltage compensator |
| The _________ circuit provides electrons for the x-ray tube current. | filament |
| With half-wave rectification, the current flows through the x-ray tube during the ________ part of the cycle. | positive |
| In modern imaging systems, the components for rectification are ____________. | solid state semiconductors |
| The high voltage generator contains the high voltage transformer, the __________, and the ___________. | filament transformer; rectifiers |
| The automatic exposure control (AEC) terminates the exposure when ________________. | sufficient radiation reaches the image receptor |
| The first component to receive power in the x-ray circuit is the ______________. | autotransformer |
| What is the most common cause of tube failure? | Tungsten vaporization |
| The x-ray intensity is lower on the anode side of the tube because of the _________. | heel effect |
| Each tube has its own tube rating chart to show __________________. | maximum exposure times |
| The negative side of the x-ray tube holds the ________. | filament |
| The filament is made of __________. | tungsten |
| Because of the line focus principal, the effective focal spot size decreases with decreasing _____________. | target angle |
| When electrons bombard the target, ____% of their kinetic energy is converted to heat. | 99% |
| The ___________ is the source of radiation in the x-ray tube. | Focal Spot |
| The target of the rotating anode is usually coated with a ___________ alloy. | tungsten |
Created by:
travis686
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