Question 1

When using the bisecting method the object-film distance is kept to a ______________.

Accepted Answer

minimum

Question 2

All of the following will keep the penumbra as small as possible EXCEPT:&#10;A)small focal spot&#10;B)small OFD&#10;C)angulation of the target&#10;D)decreased FFD

Accepted Answer

Decreased FFD (Focal Film Distance) increases the penumbra, making the image less sharp. A larger FFD helps reduce the penumbra, improving image clarity.

Question 3

Scatter radiation can be reduced by all of the following methods EXCEPT:&#10;A)open-ended PIDs&#10;B)lead foil inside the film packet&#10;C)kVp settings of 65 and below&#10;D)using as small a beam as possible

Accepted Answer

The other options listed can help reduce scatter radiation. Open-ended PIDs allow for more of the scattered radiation to escape, reducing the amount that reaches the film/detector. Lead foil inside the film packet can absorb some of the scattered radiation before it reaches the film. Using a smaller beam can also reduce scatter because there is less tissue for the radiation to scatter off of. The kVp setting affects how much scatter is produced in the first place, with lower settings producing less scatter. Therefore, the incorrect answer is C, which suggests that using kVp settings of 65 and below does not reduce scatter.

Question 4

Long-scale contrast gives the radiograph a (an):&#10;A)black and white appearance&#10;B)gray appearance&#10;C)underpenetrated appearance&#10;D)fogged appearance

Accepted Answer

Long-scale contrast refers to a radiographic image that has a wide range of gray shades between black and white, which allows for subtle differences in tissue density to be seen. This is in contrast to short-scale contrast, which has a smaller range of gray shades and results in a more black and white appearance. Thus, option B is the correct choice as it describes the appearance of a radiograph with long-scale contrast.

Question 5

Identify the correct position of the PID when intraoral radiographs are taken:&#10;A)completely flat against the patient's face&#10;B)almost touching the patient's face&#10;C)within 1 to 2 inches of the patient's face&#10;D)within 3 to 4 inches of the patient's face

Accepted Answer

The answer of Identify the correct position of the PID...

Question 6

A radiographic image produced with a kVp setting of approximately 90 will appear as an:&#10;A)image with low-contrast&#10;B)image with long-scale contrast&#10;C)image with many shades of gray&#10;D)all of the above

Accepted Answer

A radiographic image produced with a kVp setting of approximately 90 will appear as an image with low-contrast, as most of the X-rays able to penetrate the body will pass through the tissue and be absorbed by the intensifying screen or digital detector. This produces an image with a long-scale contrast, with many shades of gray visible. Therefore, the best choice is D, all of the above.

Question 7

When the position-indicating device (PID)is positioned 2 inches away from the face and all other factors are equal, the resulting film will be:&#10;A)light&#10;B)dark&#10;C)distorted&#10;D)magnified

Accepted Answer

When the PID is positioned 2 inches away from the face, the resulting film will be light because the x-rays will be less attenuated by the tissue and more will reach the film.

Question 8

A radiographic image produced with a kVp setting of approximately 65 will appear as an:&#10;A)image with high-contrast&#10;B)image with short-scale contrast&#10;C)image with mostly black and white areas&#10;D)all of the above

Accepted Answer

A kVp setting of approximately 65 results in high-contrast, short-scale contrast images with mostly black and white areas, which are all characteristics described in options A, B, and C.

Question 9

The pointed cone should _______ be used with the bisecting technique.

Accepted Answer

The answer of The pointed cone should _______ be used...

Question 10

The most common cause of poor definition in a radiograph is ___________.

Accepted Answer

The answer of The most common cause of poor definition...

Question 11

The degree of blackness on a film in known as:&#10;A)contrast&#10;B)density&#10;C)umbra&#10;D)penumbra

Accepted Answer

The answer of The degree of blackness on a film...

Question 12

The concept that governs the result in question 6 is the:&#10;A)thermionic emission effect&#10;B)HVL factor&#10;C)inverse square law&#10;D)increased object-film distance

Accepted Answer

The answer of The concept that governs the result in...

Question 13

In order to increase the contrast on a radiograph one should ________ the kVp.

Accepted Answer

The answer of In order to increase the contrast on...

Question 14

All of the following are useful in viewing radiographs EXCEPT:&#10;A)an illuminator&#10;B)ceiling light&#10;C)a magnifying glass&#10;D)a darkened room

Accepted Answer

The answer of All of the following are useful in...

Question 15

Penumbra can be described as:&#10;A)definition&#10;B)detail&#10;C)blurring&#10;D)sharpness

Accepted Answer

The answer of Penumbra can be described as:&#10;A)definition&#10;B)detail&#10;C)blurring&#10;D)sharpness...

Question 16

The most common cause of lack of detail on a radiograph is __________.

Accepted Answer

The answer of The most common cause of lack of...

Question 17

With regard to the Inverse Square Law, if the focal spot-to-film distance (FFD)doubles, the exposure time should:&#10;A)decrease by  &#10;B)decrease by  &#10;C)double&#10;D)quadruple

Accepted Answer

The answer of With regard to the Inverse Square Law,...

Question 18

Identify the source-to-film distance (FFD)which produces the most amount of image magnification:&#10;A)6 inches&#10;B)10 inches&#10;C)12 inches&#10;D)16 inches

Accepted Answer

The answer of Identify the source-to-film distance (FFD)which produces the...

Question 19

The best way to view radiographs is:&#10;A)unmounted&#10;B)on a viewbox&#10;C)using ambient light&#10;D)in the darkroom

Accepted Answer

The answer of The best way to view radiographs is:&#10;A)unmounted&#10;B)on...

Deck 3: Image Formation