Quiz 1

Question 1

The patient demographic requirements for radiographic images include all of the following except

Answer 1

technologist’s identification.

Question 2

Which of the following is true about image markers?

1. They are entirely radiopaque.
2. They should be reversed before being placed on the IR.
3. They should be positioned as close to the median plane as possible.
4. They will be magnified if positioned on the imaging table or patient.

Answer 2

4 only

Question 3

What is the marker placement for the projection of PA cranium?

Answer 3

laterally on the side being identified

Question 4

Elongation occurs in all of the following situations except when the

Answer 4

central ray and IR are perpendicular and the part is angled.

Question 5

For an open joint space to be obtained, the central ray must be aligned _____ to the joint.

Answer 5

parallel

Question 6

When the central ray is angled, the structure situated _____ is projected the most.

Answer 6

farther away from the IR

Question 7

Three images were obtained on the same structure with a computed radiography system.

Image 1 was obtained using a 48-inch source–image receptor distance (SID) and a 5-inch object–image receptor distance (OID);

image 2 was obtained using a 48-inch SID and a 3-inch OID;

image 3 was obtained with a 48-inch SID, a 3-inch OID, and a larger IR.

Which image will demonstrate the sharpest recorded detail?

Answer 7

Image 2

Question 8

A small focal spot should be used for each of the following situations except when

Answer 8

the milliamperage setting is above 300.

Question 9

An image demonstrating motion and adequate density was obtained using 100 mA at 0.5 seconds. If the time is changed to 0.25 seconds, what mA should be used to maintain density?

Answer 9

200 mA

Question 10

Minimizing size distortion is accomplished by which of the following?

1. Using the longest feasible SID
2. Using the shortest possible OID
3. Increasing the angle of the CR
4. Placing the part as close to the IR as possible

Answer 10

1,2 and 4 only

Question 11

True or False :The quality of spatial resolution of a digital imaging system is mainly defined by

1. the size of the matrix.
2. the size of the pixel within the matrix.

Answer 11

True

Question 12

What is the location on a histogram graph of air/gas?

Answer 12

Right

Question 13

What is the location on a histogram graph of bone?

Answer 13

Left

Question 14

What is the location on a histogram graph of soft tissue?

Answer 14

Center

Question 15

All of the following are guidelines for producing optimal image histograms except

A -choose the correct body part and projection from the workstation menu.
B -leave minimal background in the exposure field through tight collimation.
C -use the smallest possible IR and cover at least 50% of it.
D -erase the imaging plate if the IR has not been used for a few days.

Answer 15

C

Question 16

When is the examination or body part selected when using the DR system?

Answer 16

Before the radiation exposure

Question 17

Which of the following CR cassette sizes will provide the greatest recorded detail?

Answer 17

8 ´ 10 inch

Question 18

Saturation indicates

Answer 18

overexposure of the IR.

Question 19

When an image resembles a double exposure, the type of artifact demonstrated is a(n) _____ artifact.

Answer 19

phantom image

Question 20

Histogram analysis errors for direct digital systems include all of the following except

A-off-centered CR.
B-wrong part selection from the workstation menu.
C-collimation within 0.5 inch (2.5 cm) of the skin line.
D-exposure of less than 30% of the IR.

Answer 20

D

Question 21

Which of the following patient conditions demonstrates high subject contrast?

Answer 21

Dense bones

Question 22

Which of the following patient conditions demonstrates low subject contrast?

Answer 22

High fat content

Question 23

Which of the following patient conditions demonstrates high subject contrast?

Answer 23

Dense bones

Question 24

If a projection does not differentiate the densest and thickest structures in the VOI, adjusting the _____ is necessitated.

Answer 24

kVp

Question 25

Which of the following patient conditions demonstrates low subject contrast?

Answer 25

Obesity

Question 26

A PA chest projection with accurate positioning demonstrates

1. 10 or 11 posterior ribs above the diaphragm.
2. equal posterior rib length on both sides of the chest.
3. the manubrium superimposed by the fourth thoracic vertebra.
4. the scapulae outside the lung field.

Answer 26

1,2,3 and 4

Question 27

A PA chest projection was obtained using a grid with a recommended 40-inch focal range with a 72-inch SID. Where would the grid cutoff be demonstrated on the projection?

Answer 27

Peripherally

Question 28

What is the technical adjustment required with the patient condition of osteoporosis?

Answer 28

–8 kVp

Question 29

What percentage of kVp adjustment doubles the density on an image?

Answer 29

15%

Question 30

An AP abdomen projection was obtained using 85 kVp at 10 mAs. The resulting image demonstrated excessively low contrast, although the density was acceptable. What new technique could be used to obtain the projection with equal density but higher contrast?

Answer 30

72 kVp at 20 mAs

Question 31

A rotated left lateral chest projection demonstrates the heart shadow posterior to the sternum. Which is the anteriorly positioned lung?

Answer 31

Right

Question 32

A left lateral chest projection with poor positioning demonstrates the humeri soft tissue superimposed over the anterior lung apices. How was the patient positioned for such an image to be obtained?

Answer 32

The humeri were positioned at a 90-degree angle with the body.

Question 33

The last rib is attached to the ____ vertebra.

Answer 33

twelfth

Question 34

Regarding a PA Chest radiograph,

Are the below Body Habitus and IR placement configurations are true or false ?

Hypersthenic = CW
Sthenic = LW
Hyposthenic = LW
Asthenic = LW

Answer 34

True

Question 35

What is the marker placement of the projection of lateral hand?

Answer 35

Anywhere within the exposure field

Question 36

What is the location on a histogram graph of fat?

Answer 36

Right