Question 1

Windowing does not alter the original stored pixel values.

Accepted Answer

Windowing only changes the way the pixel values are displayed, not the actual values stored in the image.

Question 2

Optimal ranges of exposure indicator values are very similar amongst all vendors.

Accepted Answer

Different vendors may have varying optimal ranges for exposure indicator values due to differences in technology, calibration, and design of their imaging systems.

Question 3

Metallic replacement and the electrolytic method are used in:

Accepted Answer

Metallic replacement and the electrolytic method are used in silver recovery, where silver is extracted from used fixer solution in order to be reused or disposed of properly.

Question 4

Compared to baseline measurements, speed and contrast indicators should not vary more than ± _____ optical density.

Accepted Answer

Compared to baseline measurements,speed and contrast indicators should not vary more than 0.15 optical density.

Question 5

A 40 watt light bulb is appropriate for a darkroom safelight.

Accepted Answer

A 40 watt light bulb is too bright for a darkroom safelight, which typically uses a much lower wattage bulb to prevent exposing photographic materials.

Question 6

If the film developer temperature is too low, the processed image will appear:

Accepted Answer

If the film developer temperature is too low, the processed image will appear light. This is because a lower temperature slows down the chemical reaction and results in less contrast and density in the image.

Question 7

Which film processing system best achieves agitation, continuous mixing, and filtration of the chemical solutions?

Accepted Answer

The recirculation system is the best choice as it continuously mixes and agitates the chemical solutions while also providing filtration for the solution. This ensures even development and processing of the film. The transport system only moves the film through the chemical solutions, while the temperature control system only regulates the temperature of the solutions. The replenishment system adds fresh chemicals to the solutions but does not provide agitation or filtration.

Question 8

Dry laser printers use heat to print the image.

Accepted Answer

Dry laser printers use a process called toner fusion, where heat is used to melt the toner onto the paper to create the printed image.

Question 9

A safelight fog quality control test should be performed:

Accepted Answer

The answer of A safelight fog quality control test should...

Question 10

Ambient lighting refers to the darkness or brightness of the digital image viewing area.

Accepted Answer

Ambient lighting affects how a digital image is perceived by influencing the overall brightness or darkness of the viewing environment.

Question 11

A high level of ambient lighting will improve the viewer's perception of digital image quality as displayed on the monitor.

Accepted Answer

A high level of ambient lighting can actually negatively impact the viewer's perception of digital image quality on a monitor by causing glare and reducing contrast. Lower ambient lighting with proper monitor calibration is recommended for optimal image quality.

Question 12

If films begin to show brown staining after being in storage for a long time, there might be a problem with which stage of the processing cycle?

Accepted Answer

Improper washing can result in excessive amounts of fixer solution being left on the film,leading to staining or fading of the image.

Question 13

The most important performance criterion of a film illuminator is:

Accepted Answer

The uniformity of light intensity is the most important performance criterion for a film illuminator because it ensures that the entire film is evenly lit, allowing for accurate and clear viewing. The other options, such as size or brightness, may be important but are not as critical as uniformity of light intensity.

Question 14

If a film processor is turned on but hasn't been used for a while, in order to get the roller assembly moving you will have to push the:

Accepted Answer

The standby control is used to get the roller assembly moving after the film processor has been turned on but hasn't been used for a while.

Question 15

A radiograph with increased density may be the result of:

Accepted Answer

High developer temperature can cause increased density on a radiograph.

Question 16

The histogram for a digital image is compared to a pre-established histogram of the anatomic part being imaged.

Accepted Answer

The comparison of histograms is a technique used in digital imaging to ensure that the captured image matches the expected characteristics of the anatomical part, aiding in proper exposure and contrast adjustments.

Question 17

Using a lookup table to adjust the digital image's brightness changes the original pixel value.

Accepted Answer

When using a lookup table to adjust the brightness of a digital image, the original pixel values are mapped to new values based on the table. This means that the original pixel values are changed or adjusted in the process.

Question 18

One and one half minutes (90 seconds)is a typical film processing cycle.

Accepted Answer

One and one half minutes (90 seconds) is indeed a typical film processing cycle.

Question 19

All display monitors used throughout the radiology department are of similar quality.

Accepted Answer

Display monitors in a radiology department can vary in quality, with diagnostic monitors typically having higher resolution and better calibration than standard office monitors to ensure accurate image interpretation.

Question 20

The recommended ranges of exposure indicator values are different for extremity versus spine examinations.

Accepted Answer

This is true. The recommended ranges for exposure indicator values are typically lower for extremity exams because the body parts being imaged are smaller and more sensitive to radiation. Spine exams often require higher exposure due to the larger size of the body part being imaged.

Quiz 7: Image Processing and Display