Help
Options
Question
A high-speed electron passing near or through a tungsten atom, is attracted and slowed down by positively charged necleus and deflected from its course with a loss of engery.
click to flip
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't know
Question
What is energy loss given up in the form of?
Remaining cards (29)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
RADT 456 Equipment O
Equipment Operation and Quality Control: Study
| Question | Answer |
|---|---|
| A high-speed electron passing near or through a tungsten atom, is attracted and slowed down by positively charged necleus and deflected from its course with a loss of engery. | Bremsstrahlung Radiation |
| What is energy loss given up in the form of? | an x-ray photon |
| What is the energy of the characteristic ray equal to? | the difference in energy between the K and L shell energy levels |
| What are shorter wavelengths associated with? | higher freequency, higher energy, and increased ionizing potential |
| What can x-ray photons do? | pass through the part, be absorbed by the part,and scatter within the part |
| What changes mechanical energy to electrical energy? | generators |
| The distance between two consecutive crests; one positive and one negatice half-cycle? | wavelength |
| What are the number of cycles per second called? | frequency |
| What type of principle do transformers operate on? | mutual induction |
| What is another name for step-down transformers? | filament transformers |
| What does the x-ray tube consist of? | anode (positive electrode), cathode (negatice electrode), and glass envelope (vacuum) |
| What is a graphite/molybdenum disk with a beveled edge called? | an anode |
| What conducts heat away from the anode face? | copper stem |
| What are the characteristics of Tungsten as a target material? | high atomic number increases x-ray production, high melting point resist pitting and creaking, and thermal conductivity for heat dissipation |
| What is teh effective focal spot that is always smaller than the actual focal spot? | line focus principle |
| What functions to regulate the length of the x-ray exposure? | timer |
| What functions to automatically adjust for any fluctuations in incoming voltage supply? | line coltage compensator |
| What does the radiographer use to choose the kilovoltage? | Kv selector |
| What is a variable transformer that operates on AC and enables the radiographer to select kilovoltage? | autotransformer |
| What are the different types of x-ray timers? | mechanical, synchronous, impulse, electronic, mAs, and AEC |
| What are the primary low-voltage circuit components? | main switch/circuit breaker, autotransformer, kv selector switch, line voltage compensator, timer primary coil of HV transformer, exposure switch |
| What is CR resolution determined by? | the size of barium fluorohalide phosphor, width of laser beam, and monitor matrix |
| What is used to evaluate the focal spot size? | slit camera |
| What image matrix size with result in the best spatial resolution? | 2,048 X 2,048 |
| What is the device used to ensure reproducible images, regardless of tissue density variations? | ionization chamber |
| Changes in window width in digital imaging can result in changes in: | contrast |
| What circuit devices operate on the principle of self-induction? | autotransformer and choke coil |
| How often should fluoroscopic shielding apparel be fluoroscoped to check for cracks? | annually |
| What is the spinning-top test used to evaluate? | timer accuracy and rectifier failure |
| What can cause poor screen-to-film contact? | damaged cassette frame, foreign body in cassette, and warped cassette front |
Created by:
anbrunes
Popular Radiology sets