ANS: D REF: P. 8 - Test Bank Chapter 01: Guidelines for Image Anal...

Radiographic Image Analysis 4th Edition Martensen Test Bank

Chapter 01: Guidelines for Image Analysis

MULTIPLE CHOICE

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

except

• patient and facility identification.
• time and date.
• birth date.
• technologist’s identification.

ANS: D REF: P. 8

• Which of the following is true about image markers?
• They are radiopaque.
• They should be reversed before being placed on the IR.
• They should be positioned as close to the median plane as possible.
• They will be magnified if positioned on the imaging table or patient.
• 1 only
• 1 and 4 only
• 2 and 3 only
• 4 only

ANS: B REF: P. 10

• What is the marker placeT

mE eS ntT foB rA thN eK pS roE jeL cL tioE nR o.fC laO teM ral vertebrae?

• Laterally on the side being identified
• Anteriorly, identifying the side positioned closer to the IR
• Anywhere within exposure field
• Laterally, identifying the side situated closer to the IR

ANS: B REF: P. 10 | Box 1-3

• What is the marker placement for the projection of PA cranium?
• Laterally on the side being identified
• Anteriorly, identifying the side positioned closer to the IR
• Anywhere within the exposure field
• Laterally, identifying the side situated closer to the IR

ANS: A REF: P. 10 | Box 1-3

• What is the marker placement for the projection of PA oblique vertebrae?
• Laterally on the side being identified
• Anteriorly, identifying the side positioned closer to the IR
• Anywhere within the exposure field
• Laterally, identifying the side situated closer to the IR

ANS: D REF: P. 10 | Box 1-3

• What is the marker placement of the projection of lateral hand. 1 / 4

• Laterally on the side being identified
• Anteriorly, identifying the side positioned closer to the IR
• Anywhere within the exposure field
• Laterally, identifying the side situated closer to the IR

ANS: C REF: P. 10 | Box 1-3

• Which guideline should be used to position the identification (ID) plate?
• Place the ID plate within the collimated field whenever possible.
• Position the ID plate toward the direction in which the central ray was angled.
• Position the ID plate next to the narrowest anatomic structure.

ANS: C REF: P. 12

• Good collimation practices will do all of the following except
• decrease the radiation dosage.
• affect the amount of scatter radiation that reaches the IR.
• reduce the visibility of recorded details.
• reduce digital radiography histogram analysis errors.

ANS: C REF: P. 14

• Elongation occurs in all of the following situations except when the
• part is off center.
• central ray is angled with the part.
• central ray and part are perpendicular but the IR is angled.
• central ray and IR are perpendicular and the part is angled.

ANS: D REF: PP. 22-23

• For an open joint space to be obtained, the central ray must be aligned to the joint.
• perpendicular
• parallel
• 5 degrees cephalic for each 4 inches of tissue thickness
• 5 degrees caudal for each 4 inches of tissue thickness

ANS: B REF: P. 25

• When the central ray is angled, the structure situated is projected the most.
• farther away from the IR
• closer to the IR
• proximal to the tube
• distal to the tube

ANS: A REF: P. 21

• 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; and 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?

• Image 1 2 / 4

• Image 2
• Image 3
• There will be no difference in recorded detail.

ANS: B REF: P. 28

• 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; and image 3 was obtained with a 48-inch SID, a 3-inch OID, and a larger IR.Which image will demonstrate the greatest size distortion?

• Image 1
• Image 2
• Image 3
• There will be no difference in size distortion.

ANS: A REF: PP. 22-23

• A small focal spot should be used for each of the following situations except when
• fine detail demonstration is important.
• extremities are imaged.
• the milliamperage setting is above 300.
• the patient can control motion.

ANS: C REF: P. 29

• An image demonstrating motion and adequate density was obtained using 100 mA at 0.5

seconds. If the time is chTanEgSedTtBoA0N.2K5SseEcLonLdEs,Rw.hCatOmMA should be used to maintain density?

• 100 mA
• 200 mA
• 300 mA
• 400 mA

ANS: B REF: PP. 30-31

• Anatomical relationships are affected by
• varying degrees of patient obliquity and flexion.
• off centering.
• geometrical factors of magnification, elongation, and foreshortening.
• similar structures of shape and size.
• 1 and 4 only
• 1, 2, and 4 only
• 1, 3, and 4 only
• None of the above

ANS: D REF: PP. 18-19

• Good collimation practices result in which of the following?
• Reduces histogram analysis errors
• Clearly delineates the VOI 3 / 4

• Improves the visibility of recorded details by reducing the amount of scatter radiation

that reaches the IR

• Decreases the radiation dosage by limiting the amount of scatter from the patient
• 2 and 3 only
• 1, 2, and 3 only
• 1, 2, and 4 only
• 1, 2, 3, and 4

ANS: B REF: PP. 14-15

• Minimizing size distortion is accomplished by which of the following?
• Using the longest feasible SID
• Using the shortest possible OID
• Decreasing the angle of the CR
• Placing the part as close to the IR as possible
• 2 and 3 only
• 1, 2, and 3 only
• 1, 2, and 4 only
• 1, 2, 3, and 4

ANS: C REF: PP. 22-23

• Collimation guidelines include all of the following except for
• chest and abdomen projections, collimate to within 1 inch (2.5 cm) of the patient’s skin

line.

• extremity projections, collimate to within 0.5 inch (1.25 cm) of the skin line of the

thickest VOI.

• chest and abdomen projections, collimate to within 0.50 inch (1.25 cm) of the IR edge.
• collimating structures within the torso, bring the collimated borders to within 1 inch

(2.5 cm) of the VOI.

• 1 and 3
• 2 and 4
• 3 only
• 4 only

ANS: A REF: P. 16 | Box 1-4

• The medial and lateral femoral condyles are not superimposed on a lateral knee projection.

The larger, lateral condyle is 1 inch (2.5 cm) anterior to the medial condyle. The best way to correct this error is to

• rotate the medial condyle 1 inch (2.5 cm) anteriorly.
• rotate the medial condyle 0.5 inch (1.25 cm) anteriorly.
• increase the CR angle to accommodate for the larger condyle.
• increase the CR angle to magnify the smaller condyle.

ANS: C REF: P. 25

• When imaging long bones, which of the following is (are) correct statements?
• Choose a large enough IR so that one or both joints are included on the projection.
• Extend the collimation field so it extends 1 to 2 inches (2.5 cm to 5 cm) beyond the

joints spaces as required.

• / 4