X-ray production, exposure factors, and imaging equipment components tested on radiologic technology certification exams.
37 cards · basic cards · AI-written, checked twice. Edit anything.
- What is the function of the cathode in an X-ray tube?
- Produces electrons through thermionic emission from a heated filament
- What material is typically used for the target (anode) in an X-ray tube?
- Tungsten, because of its high atomic number and high melting point
- What is thermionic emission?
- Emission of electrons from a heated cathode filament
- What is the primary source of X-rays in an X-ray tube?
- Interaction of high-speed electrons with the target material (Bremsstrahlung radiation)
- What exposure factor controls the quantity of X-rays produced?
- Milliamperage (mA)
- What exposure factor controls the duration of X-ray production?
- Exposure time (measured in seconds or milliseconds)
- What exposure factor controls the quality (penetrating power) of X-rays?
- Kilovoltage (kVp)
- How does increased exposure time affect radiographic density?
- Increases radiographic density
- How does increased mA affect radiographic density?
- Increases radiographic density
- How does increased kVp affect radiographic contrast?
- Decreases radiographic contrast
- What is the inverse square law?
- Radiation intensity is inversely proportional to the square of the distance from the source
- What does SID stand for in radiography?
- Source-to-image distance, the distance from the X-ray tube to the image receptor
- What does OID stand for in radiography?
- Object-to-image distance, the distance from the anatomical part to the image receptor
- How does increased OID affect magnification?
- Increases magnification of the anatomical part
- What is the primary function of the X-ray collimator?
- To limit the X-ray beam size and field of exposure