Question 1

A sensor with a fiberoptic cable linked to the computer is placed into the mouth of the patient and exposed to x-radiation. This is an example of:

Accepted Answer

This scenario describes direct digital imaging, where a sensor directly captures the x-ray image and sends it to a computer for immediate viewing.

Question 2

Most digital imaging systems use a ____ as the x-radiation source.

Accepted Answer

Conventional dental x-ray units are the most commonly used x-radiation source in digital imaging systems in dentistry, especially for intraoral and extraoral radiographs. Flat-bed scanners, analog and digital intraoral cameras are not suitable for providing x-radiation source.

Question 3

It is questionable whether digital images can be used as evidence in lawsuits because:

Accepted Answer

The original digital image can be easily altered or enhanced, making it difficult to prove its authenticity in court.

Question 4

In order to be used for digital imaging, the x-ray unit timer must be adapted to allow exposures in a time frame of ____ of a second.

Accepted Answer

In order to be used for digital imaging,the x-ray unit timer must be adapted to allow exposures in a time frame of 1/100 of a second.

Question 5

Sensors that cannot be sterilized:

Accepted Answer

sensors that cannot be sterilized should be covered with disposable plastic sleeves for each patient to prevent cross-contamination. This ensures that the sensor remains clean and free of bacteria or viruses during use on successive patients.

Question 6

Conventional dental x-ray film has a resolution of ____ lp/mm.

Accepted Answer

Conventional dental x-ray film has a resolution of 12 to 20 lp/mm.

Question 7

Digital imaging uses ____ to produce an image.

Accepted Answer

Digital imaging uses an electronic sensor and computerized imaging system to produce an image. This technology does not require an x-ray processor, radiographic film, or processing chemistry.

Question 8

Storage phosphor imaging:

Accepted Answer

Storage phosphor imaging uses a reusable imaging plate, making it different from direct digital imaging, wired digital radiography systems, and sensors with fiber-optic cables.

Question 9

The images are cleared from the storage phosphor imaging plates by:

Accepted Answer

Storage phosphor imaging plates are cleared by exposing them to bright light, such as from a viewbox, which erases the latent image by releasing the stored energy.

Question 10

____ digital imaging involves digitizing an existing x-ray film using a CCD camerA. Indirect digital imaging is ____ to direct digital imaging.

Accepted Answer

Indirect digital imaging involves digitizing an existing x-ray film using a CCD camera, which is an inferior method compared to direct digital imaging. Direct digital imaging involves capturing the x-ray image directly using a digital sensor, which is a superior method in terms of image quality and efficiency.

Question 11

Advantages of digital imaging include:

Accepted Answer

Digital imaging allows for images to be viewed almost instantly, increasing the speed at which diagnoses and treatments can be made. A and C are incorrect, as not all sensors can be autoclaved and color radiography is not a universally available feature of digital imaging. D is incorrect as digital imaging typically has high initial setup costs.

Question 12

Advantages of the use of digital imaging include which of the following?

Accepted Answer

Digital imaging offers benefits such as being a useful patient education tool, enhancing interactive dialogue, and improving patient understanding of diseases.

Question 13

The electrons that compose the silicon charge-coupled device (CCD) can be visualized as being divided into an arrangement of blocks or picture elements known as:

Accepted Answer

The term "pixel" refers to the individual blocks or picture elements on a CCD, where each pixel corresponds to a specific section of the image being captured. The other answer choices (A, C, and D) do not accurately describe the structure of a CCD.

Question 14

With the feature of ____, the gray-scale of the diagnostic image is reversed so that radiolucent images appear white and radiopaque images appear black.

Accepted Answer

Digital subtraction is a technique used to reverse the gray-scale of diagnostic images, making radiolucent areas appear white and radiopaque areas appear black.

Question 15

A primary advantage to digital imaging is the superior gray-scale resolution that results. Digital imaging uses up to 32 shades of gray.

Accepted Answer

The first statement is true because digital imaging can produce a higher gray-scale resolution than traditional film imaging. However, the second statement is false because digital imaging can use up to 256 shades of gray, not just 32.

Question 16

The human eye can appreciate ____ shades of gray.

Accepted Answer

The answer of The human eye can appreciate ____ shades...

Question 17

With digital imaging, the term ____ is used to describe the pictures that are produced.

Accepted Answer

The term used to describe the pictures produced with digital imaging is "image". Radiograph refers to an image produced by traditional radiography (using X-ray film), and phosphor refers to a material used in digital imaging plates to capture X-rays. So, while A, B, and D are related to the process of producing images, only C refers directly to the images themselves.

Question 18

Given that the human eye can resolve 8 to 10 lp/mm, a CCD system is inadequate for diagnosis of dental disease. The majority of the research has shown that the traditional
Radiographs perform at least as well as digital images and at times even better.

Accepted Answer

The answer of Given that the human eye can resolve...

Question 19

Exposure times are ____ than that required for conventional radiography.

Accepted Answer

Exposure times for digital radiography are generally 50% to 90% less than that required for conventional radiography. This is because digital systems are more sensitive to X-rays and require less radiation to produce high-quality images.

Question 20

Advantages of the use of digital imaging include which of the following?

Accepted Answer

The use of digital imaging offers advantages such as easier image storage and communication with digital networking, and electronic transmission of images to other dental professionals. However, the digital image can also be incorporated into the electronic record, which is not listed as an advantage. Therefore, the best choice is D, as it includes some advantages of digital imaging without including a disadvantage.

Quiz 25: Digital Imaging

A sensor with a fiberoptic cable linked to the computer is placed into the mouth of the patient and exposed to x-radiation. This is an example of:

Most digital imaging systems use a ____ as the x-radiation source.

It is questionable whether digital images can be used as evidence in lawsuits because:

In order to be used for digital imaging, the x-ray unit timer must be adapted to allow exposures in a time frame of ____ of a second.

Sensors that cannot be sterilized:

Conventional dental x-ray film has a resolution of ____ lp/mm.

Digital imaging uses ____ to produce an image.

Storage phosphor imaging:

The images are cleared from the storage phosphor imaging plates by:

digital imaging involves digitizing an existing x-ray film using a CCD camerA. Indirect digital imaging is to direct digital imaging.

Advantages of digital imaging include:

Advantages of the use of digital imaging include which of the following?

The electrons that compose the silicon charge-coupled device (CCD) can be visualized as being divided into an arrangement of blocks or picture elements known as:

With the feature of ____, the gray-scale of the diagnostic image is reversed so that radiolucent images appear white and radiopaque images appear black.

A primary advantage to digital imaging is the superior gray-scale resolution that results. Digital imaging uses up to 32 shades of gray.

The human eye can appreciate ____ shades of gray.

With digital imaging, the term ____ is used to describe the pictures that are produced.

Given that the human eye can resolve 8 to 10 lp/mm, a CCD system is inadequate for diagnosis of dental disease. The majority of the research has shown that the traditional Radiographs perform at least as well as digital images and at times even better.

Exposure times are ____ than that required for conventional radiography.

Advantages of the use of digital imaging include which of the following?