Questions: 22. The overall lightness or darkness of a radiograph is called a. density b. contrast c. definition d. f ∘ g packets following ry store film 24. What device is used to control the size and shape of the primary x-ray beam? a. filter b. rectifier c. collimator d. film holder 25. Which material provides the best protection from x-ray photons? (stops xrays) a. aluminum b. concrete c. lead d. wood 26. The cervical collar on a lead apron is placed to protect the: a. reproductive organs b. vital organs in the chest area c. thyroid gland d. spinal column 27. According to the nuclear regulatory commission, the annual maximum permissible dose (MPD) to occupationally-exposed individuals should not exceed: a. .03 Sv(30 msv) b. .05 Sv(50 mSv) c. 3.0 Sv(3000 mSv) d. 5.0 Sv(5000 mSv) 29. The paralleling technique of radiographic exposure fulfills which of the following principles of ideal projection? 1. The radiation source is small 2. The source-object distance is long 3. The object-film distance is short 4. The object and film are parallel 5. The central ray strikes the object and film at a 90 degree angle a. 1,2,3,4 b. 1,2,3,5 c. 1,2,4,5 d. 1,3,4,5 e. 1,2,3,4,5 30. After the x-ray unit is turned off, for how long do x-rays continue to exist in the room? a. For 6 seconds if the exposure time was 1 / 6 second b. For 6 minutes if the exposure time was 1 / 6 second c. It depends on the humidity in the room d. It depends on the kvp setting e. The x-rays no longer exist in the room once the exposure is complete

22. The overall lightness or darkness of a radiograph is called a. density b. contrast c. definition d. f ∘ g packets following ry store film 24. What device is used to control the size and shape of the primary x-ray beam? a. filter b. rectifier c. collimator d. film holder 25. Which material provides the best protection from x-ray photons? (stops xrays) a. aluminum b. concrete c. lead d. wood 26. The cervical collar on a lead apron is placed to protect the: a. reproductive organs b. vital organs in the chest area c. thyroid gland d. spinal column 27. According to the nuclear regulatory commission, the annual maximum permissible dose (MPD) to occupationally-exposed individuals should not exceed: a. .03 Sv(30 msv) b. .05 Sv(50 mSv) c. 3.0 Sv(3000 mSv) d. 5.0 Sv(5000 mSv) 29. The paralleling technique of radiographic exposure fulfills which of the following principles of ideal projection? 1. The radiation source is small 2. The source-object distance is long 3. The object-film distance is short 4. The object and film are parallel 5. The central ray strikes the object and film at a 90 degree angle a. 1,2,3,4 b. 1,2,3,5 c. 1,2,4,5 d. 1,3,4,5 e. 1,2,3,4,5 30. After the x-ray unit is turned off, for how long do x-rays continue to exist in the room? a. For 6 seconds if the exposure time was 1 / 6 second b. For 6 minutes if the exposure time was 1 / 6 second c. It depends on the humidity in the room d. It depends on the kvp setting e. The x-rays no longer exist in the room once the exposure is complete
Transcript text: 22. The overall lightness or darkness of a radiograph is called a. density b. contrast c. definition d. $f \circ g$ packets following ry store film 24. What device is used to control the size and shape of the primary x-ray beam? a. filter b. rectifier c. collimator d. film holder 25. Which material provides the best protection from x-ray photons? (stops xrays) a. aluminum b. concrete c. lead d. wood 26. The cervical collar on a lead apron is placed to protect the: a. reproductive organs b. vital organs in the chest area c. thyroid gland d. spinal column 27. According to the nuclear regulatory commission, the annual maximum permissible dose (MPD) to occupationally-exposed individuals should not exceed: a. $.03 \mathrm{~Sv}(30 \mathrm{msv})$ b. $.05 \mathrm{~Sv}(50 \mathrm{mSv})$ c. $3.0 \mathrm{~Sv}(3000 \mathrm{mSv})$ d. $5.0 \mathrm{~Sv}(5000 \mathrm{mSv})$ 29. The paralleling technique of radiographic exposure fulfills which of the following principles of ideal projection? 1. The radiation source is small 2. The source-object distance is long 3. The object-film distance is short 4. The object and film are parallel 5. The central ray strikes the object and film at a 90 degree angle a. $1,2,3,4$ b. $1,2,3,5$ c. $1,2,4,5$ d. $1,3,4,5$ e. $1,2,3,4,5$ 30. After the x-ray unit is turned off, for how long do $x$-rays continue to exist in the room? a. For 6 seconds if the exposure time was $1 / 6$ second b. For 6 minutes if the exposure time was $1 / 6$ second c. It depends on the humidity in the room d. It depends on the kvp setting e. The x-rays no longer exist in the room once the exposure is complete
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Solution

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Solution Steps

Step 1: Question 22

The overall lightness or darkness of a radiograph is referred to as its density. Contrast refers to the difference in densities between adjacent areas on a radiograph. Definition refers to the sharpness of the image.

Step 2: Question 23

Exposed films should never be placed in a disposable cup, on the counter top, or in the patient's lap due to infection control and potential loss. The lab coat pocket could also lead to potential loss or bending of the film.

Step 3: Question 24

The collimator is a device used to restrict the size and shape of the x-ray beam, reducing patient exposure and improving image quality. The filter removes low-energy x-rays, the rectifier ensures a unidirectional current, and the film holder, well, holds the film.

Final Answer

  1. \( \boxed{a} \)
  2. There is no correct option provided in the given choices. The proper protocol is to place exposed films in a designated container specifically for that purpose, often a lead-lined container outside the operatory until processing.
  3. \( \boxed{c} \)
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