2024 VTNE Radiography ( Version 2 ) Complete Questions & Answers (Solved) 100% Correct
- Quantum mottle
Answer:
Radiographic noise produced by the random interaction of x-rays with an intensifying screen More noticeable when very high rare earth systems are used at a high kVp, high film speed
- A short focal-film distance results in what?
Answer: A darker film
- Information required on a radiographic film
Answer:
Name and address of hospital Date (day, month, year) Name of client and patient Age, sex, and breed of patient
- Bucky
Answer:
A moving grid that limits the amount of scatter radiation reaching a radiographic image receptor, thereby increasing image contrast Since grid moves, grid lines are not seen and image is clearer
- Collimator
Answer: A device which restricts the beam of x-rays as they leave the x-ray machine
- kVp
Answer: Peak kilovoltage High voltage circuit
The "quality" factor Controls the penetrative ability of the beam and thus affects the radiographic contrast of the x-ray
- mAs
Answer: Milliamperage per second (mA x time in seconds) The "quantity" factor Controls the amount of photons produced and thus the radiographic density
- Scatter radiation
Answer:
Increases with increased kVp 1 / 2
Decreases film quality
- Silver halide crystals
Answer:
Energy-absorbing crystals in the film emulsion When placed in developer, the sensitized crystals turn to black metallic silver
- Topographic landmarks of the thorax
Answer:
Cranial: manubrium sterni
Caudal: halfway between xiphoid and last rib
- sievert (Sv)
- sievert = 100 rem
Answer: A unit of measurement that measures the amount of penetration radioactive emissions have on biological tissues
- High-speed film
Answer: Larger crystals, less detail Allows a lowering of mAs
- Low-speed film
Answer: Smaller crystals, more detail Necessitates increasing mAs
- Nonscreen film
Answer: Produces a high-detail image Good for dental x-rays
- Xiphoid process
Answer: The smallest of three parts of the sternum
Articulates caudally with the inferior end of the body of the sternum and laterally with the seventh rib
16. mAs: mA and s are related .
Answer:
Inversely (an increase in one necessitates a decrease in the other to produce the same mAs) This is useful because, for a given mAs, m A can be increased, which allows the time to be decreased and movement blur to be lessened
- Penumbra
Answer: A blurred edge to an image (a halo effect) in an x-ray film
Can be caused by any combination of an overlarge focal spot, long object-to-film
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