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Radiograph Equipment
Radiography for Veterinary Technicians
| Question | Answer |
|---|---|
| How are milliamperage and time linked together? | mA is the # of electrons being released, and time refers to the amount of seconds it takes for the anode to receive the electrons-- these go hand in hand to produce a clear image (Short time, but high mA results in less blurring) |
| Describe the purpose of grids and how their use affects radiograph quality | Grids are used to decrease scatter radiation while increasing the contrast of the radiograph |
| List the parts and function of intensifying screens | Intensifying screens are white layers of plastic that line the inside of the cassette. The plastic is made up of microscopic crystals that glow and produce light when x-rays hit them. |
| How do milliamperage and kilovoltage affect contrast and density? | When mA is decreased, density is lightened. Contrast involves cooperation from both mA and kV. A lower kV and higher mA setting are needed for sharper differences such as in extremities |
| Describe the differences between standard radiography and fluoroscopy? | With standard radiography, a one time exposure is taken and evaluated. With fluoroscopy, x-rays are continuously producing during the entire procedure, to create a real-time montage of images |
| Why are intensifying screens necessary? | Because the crystals the screens contain are what emits light when x-rays hit them, thus making the image visible to the human eye |
| What does the mAs setting on the X-ray machine control? | how many electrons are released |
| What features do portable X-ray units possess? | easily moved from one place to another, commonly used in large animal medicine, & has a lower mA capability |
| What structure is the tungsten plate located on in the x-ray machine? | anode |
| What device is used to control the primary beam? | collimator |
| Why is it important in veterinary radiology to keep the mA setting as high as possible? | When the mA is kept as high as possible, the exposure time can be as low as possible. The biggest issue in getting a quality image in veterinary radiology is movement. Shorter exposure times also decrease exposure to radiation |
| What factors are included in the term "technique" | Kilovoltage (kV), milliamperage (mA), and time (s) |
| List 3 functions of the cassette. | Holds intensifying screens, keeps film clean, and keeps light away from film |
Created by:
BrianaPenn
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