Chapter 5-9 Flashcards
How far below horizontal will a patient ‘s head go on fluoroscopic couch
30° below horizontal (pababa)
How far upright horizontal will a patient’s head go on fluoroscopic couch
90° upright horizontal (patayo)
3 principles parts of x-ray imaging system
- X-ray tube
- Operating Console
- High Voltage Generator
Measure the Voltage provided to x-ray and adjust that voltage to precisely 200V
Line compensator
The power supplied yo the x-ray imaging system is delivered first to the __________________
Autotransformer
- X-ray intensity
- number of x-ray in an x-ray beam
Radiation Quantity
- X-ray penetrability
- Energy of the x-ray beam
Radiation quality
Design to supply precise Voltage to the filament circuit and to the high voltage circuit of x-ray imaging system
Single Winding
Is the release of electro from the heated filament
Thermionic Emission
Design to increase the voltage from primary to secondary
Step up transformer
Design to decrease the voltage from primary to secondary
Step down transformer
what are the 4 types of timing circuits?
- 3 are controlled by Radtech and 1 is automatic.
- Synchronous Timers
- Electronic Timers
- mAs Timers
- Automatic Exposure Control
timer that cannot be used for serial exposure because they must be reset after AEC
Synchronous Timers
- Most sophisticated, complicated, and most accurate of the x-ray exposure timers
- Can be used for rapid serial exposure
Electronic Timers
Most exposure timers are electronic and are controlled by a __________
Microprocessor
Measures the quantity of radiation that reaches the imaging receptor
Automatic Exposure Control (AEC)
Responsible for increasing the output voltage from the autotransformer to the kVp necessary for x-ray production
High Voltage Generator
Process of Converting alternating current (AC) to Direct current (DC)
Voltage Rectification or Rectification
is an electrical device used to convert alternating current (AC) into direct current (DC) by allowing a current to flow through the device in one direction only
Rectifier
Condition in which the voltage is not allowed to swing negatively during the negative half of its cycle
Half Wave Rectification
