Radiologic Physics and Image Quality
Question Bank
Course Introduction
Radiologic Physics and Image Quality introduces students to the fundamental principles of physics that underpin the generation and interpretation of medical images. The course covers key concepts such as X-ray production, interactions of radiation with matter, and the physics behind common imaging modalities including computed tomography (CT) and magnetic resonance imaging (MRI). Emphasis is placed on factors affecting image quality contrast, resolution, noise, and artifacts as well as the techniques and technologies used to optimize diagnostic accuracy while minimizing patient exposure to radiation. Students also gain an understanding of the physical principles that guide quality control and assurance in medical imaging practices.
Recommended Textbook
Workbook for Radiographic Image Analysis 4th Edition by Kathy McQuillen Martensen
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12 Chapters
558 Verified Questions
558 Flashcards
Source URL: https://quizplus.com/study-set/1701
Page 2
Chapter 1: Guidelines for Image Analysis
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41 Verified Questions
41 Flashcards
Source URL: https://quizplus.com/quiz/33703
Sample Questions
Q1) The off-centered diverged beams of a perpendicular CR will affect structures in the same manner as an angled CR. Which of the following statements best describes this relationship?
1)At a 40-inch SID, the divergence of x-rays is 1 degree for every inch off-centered in any direction from the CR.
2)At a 48-inch SID, beam divergence is off-centered about 2 degrees for every inch in any direction from the CR.
3)At a 40-inch SID, the divergence of x-rays is 2 degrees for every inch off-centered in any direction from the CR.
4)At a 72-inch SID, beam divergence is off-centered about 1 degree for every inch.
A) 1 and 2 only
B) 3 and 4 only
C) 1 and 4 only
D) 2 and 4 only
Answer: B
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3
Chapter 2: Visibility of Details
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63 Verified Questions
63 Flashcards
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Sample Questions
Q1) Which technical factor listed below is primarily used to regulate density?
A) kVp
B) mAs
C) Grids
D) Distances (SID, OID)
Answer: B
Q2) At what level is the exposure indicator reading taken on the VOI?
A) At S1
B) At S2
C) One fourth of the distance between S1 and S2
D) Halfway between S1 and S2
Answer: D
Q3) If a projection does not differentiate the densest and thickest structures in the VOI, adjusting the _____ is necessitated.
A) kVp
B) kVp and mAs
C) histogram
D) mAs and collimation
Answer: A
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Page 4
Chapter 3: Image Analysis of the Chest and Abdomen
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70 Verified Questions
70 Flashcards
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Sample Questions
Q1) The last rib is attached to the ____ vertebra.
A) eleventh
B) tenth
C) twelfth
D) ninth
Answer: C
Q2) 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?
A) The chest was rotated.
B) The inferior midsagittal plane was tilted toward the IR.
C) The humeri were positioned at a 90-degree angle with the body.
D) The central ray was angled caudally.
Answer: C
Q3) A left lateral chest projection demonstrates the gastric air bubble directly beneath the superior hemidiaphragm. Which is the superior lung?
A) Left
B) Right
Answer: A
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Page 5
Chapter 4: Image Analysis of the Upper Extremity
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68 Verified Questions
68 Flashcards
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Sample Questions
Q1) A lateral forearm projection with accurate positioning demonstrates 1)the distal scaphoid slightly distal to the pisiform.
2)the ulnar styloid in profile.
3)an open elbow joint space.
4)the radial tuberosity in profile.
A) 1, 2, and 3 only
B) 1 and 3 only
C) 2 and 4 only
D) 1, 2, 3, and 4
Q2) What is the projection for the PA oblique finger?
A) Phalanges demonstrate equal concavity.
B) Phalanges demonstrate more concavity on one side than on the other.
C) Phalanges demonstrate concavity on one side and convexity on the other.
Q3) An optimal ulnar-deviated PA axial (scaphoid) wrist projection demonstrates all of the following except
A) the scaphoid fat stripe.
B) open scaphotrapezium and scaphotrapezoidal joint spaces.
C) a closed radioscaphoid joint space.
D) alignment of the long axis of the first metacarpal and radius.
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Page 6
Chapter 5: Image Analysis of the Shoulder
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60 Verified Questions
60 Flashcards
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Sample Questions
Q1) Longitudinal foreshortening of the scapula is demonstrated on an AP shoulder projection when the
A) superior scapular angle is visualized superior to the clavicle.
B) clavicle superimposes the superior scapular angle.
C) glenoid cavity is demonstrated in profile.
D) glenoid cavity is demonstrated on end.
Q2) For a PA oblique scapular Y shoulder projection, the patient's 1)humerus is elevated until the hand is placed on the hip.
2)body is rotated toward the unaffected shoulder.
3)body is rotated until an imaginary line connecting the acromion angle and coracoid processes is aligned parallel with the IR.
4)midcoronal plane is vertical.
A) 2 and 3 only
B) 3 and 4 only
C) 2, 3, and 4 only
D) 1, 2, 3, and 4
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Chapter 6: Image Analysis of the Lower Extremity
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69 Verified Questions
69 Flashcards
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Sample Questions
Q1) An optimal lateral knee projection demonstrates A) contrast and density to visualize the posterior pericapsular fat pads.
B) the tibia without fibular head superimposition.
C) 45 degrees of knee flexion.
D) superimposed femoral condyles.
Q2) A poorly positioned AP knee projection demonstrating a larger lateral femoral condyle than medial condyle
A) was obtained with the patient's leg externally rotated.
B) may also demonstrate the fibular head without tibial superimposition.
C) will also demonstrate a closed knee joint.
D) will also demonstrate the fibular head 1 inch (2.5 cm) distal to the tibial plateau.
Q3) A 15- to 20-degree internally rotated AP oblique ankle projection with poor positioning demonstrates an open distal lateral mortise superimposing the calcaneus. How was the patient mispositioned for such an image to be obtained?
A) The foot was plantarflexed.
B) The leg was not adequately internally rotated.
C) The central ray was centered too caudally.
D) The proximal lower leg was elevated.
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8
Chapter 7: Image Analysis of the Hip and Pelvis
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33 Verified Questions
33 Flashcards
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Sample Questions
Q1) Internally rotating the affected leg for an axiolateral (inferosuperior) projection of the hip
1)positions the greater trochanter behind the femoral neck and shaft.
2)positions the lesser trochanter in profile.
3)positions the greater trochanter in profile.
4)reduces the posterior decline of the femoral neck.
A) 1 and 2 only
B) 3 and 4 only
C) 1, 3, and 4 only
D) 1, 2, and 4 only
Q2) The central ray angulation used for AP axial sacroiliac joint projections
A) produces an image without sacroiliac joint foreshortening.
B) ranges from 25 to 30 degrees cephalically.
C) needs to be greater in male than in female patients.
D) needs to be decreased as the lumbosacral curvature increases.
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Chapter 8: Image Analysis of the Cervical and Thoracic
Vertebrae
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50 Verified Questions
50 Flashcards
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Sample Questions
Q1) An AP axial cervical vertebrae projection demonstrates a portion of the third cervical vertebra superimposed over the posterior occipital bone. How should the positioning setup be adjusted to obtain an optimal projection?
A) Center the central ray more inferiorly.
B) Increase the degree of cephalic central ray angulation.
C) Decrease the degree of chin tuck.
D) Increase the degree of chin tuck.
Q2) A PA axial oblique cervical projection with accurate positioning demonstrates 1)the zygapophyseal joints.
2)the intervertebral foramina.
3)open intervertebral disk spaces.
4)the inferior cortical outlines of the mandible without superimposition.
A) 1 only
B) 2 and 4 only
C) 2 and 3 only
D) 2, 3, and 4 only
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Chapter 9: Image Analysis of the Lumbar Vertebrae,
Sacrum, and Coccyx
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30 Verified Questions
30 Flashcards
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Sample Questions
Q1) For an AP lumbar projection, the 1)ASISs are positioned at equal distances from the imaging table.
2)patient's legs are extended.
3)long axis of the vertebral column is aligned with the short axis of the collimated field.
4)central ray is centered to the iliac crest when a 14- × 17-inch (35- × 43-cm) IR is used.
A) 1 and 4 only
B) 2 only
C) 1, 2, and 4 only
D) 1, 2, 3, and 4
Q2) An AP axial sacral projection with poor positioning demonstrates that the symphysis pubis rotated toward the patient's right side. How was the positioning setup mispositioned for such a projection to be obtained?
A) The central ray was angled too cephalically.
B) The patient was in an RPO position.
C) The patient's legs were extended.
D) The patient was in an LPO position.
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11
Chapter 10: Image Analysis of the Sternum and Ribs
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13 Verified Questions
13 Flashcards
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Sample Questions
Q1) On a PA oblique sternal projection (RAO position) with accurate positioning, the 1)manubrium is demonstrated to the left of the heart shadow.
2)posterior ribs are magnified.
3)sternum is demonstrated within the heart shadow.
4)lung markings are blurred.
A) 1 and 3 only
B) 2 and 3 only
C) 1, 2, and 4 only
D) 2, 3, and 4 only
Q2) For an AP oblique rib projection (RPO or LPO position) obtained to evaluate upper posterior rib pain,
1)a 70- to 80-kVp technique is used.
2)the tenth axillary rib is centered to the collimated field.
3)the patient is rotated 45 degrees away from the affected side.
4)the image is obtained after deep expiration.
A) 1 and 2 only
B) 1 and 4 only
C) 1, 2, and 4 only
D) 1, 2, 3, and 4
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Page 12
Chapter 11: Image Analysis of the Cranium
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44 Verified Questions
44 Flashcards
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Sample Questions
Q1) A PA axial cranial projection (Caldwell method) with poor positioning demonstrates the petrous ridges inferior to the infraorbital margins. How was the patient positioned for such a projection to be obtained?
1)The patient's chin was not tucked enough.
2)The OML was not positioned perpendicular to the IR.
3)The patient's face was rotated toward the right side.
4)The patient's head was tilted.
A) 1 and 2 only
B) 2 only
C) 2 and 3 only
D) 4 only
Q2) A optimally positioned AP axial cranium projection (Towne method) demonstrates all of the following except
A) the inferior occipital bone at the center of the exposure field.
B) symmetrical petrous ridges.
C) the dorsum sellae within the foramen magnum.
D) the posterior clinoids superior to the foramen magnum.
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Chapter 12: Image Analysis of the Digestive System
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17 Verified Questions
17 Flashcards
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Sample Questions
Q1) A hypersthenic PA oblique stomach and duodenum projection (RAO position) with accurate positioning will demonstrate
1)barium in the fundus.
2)the left lumbar zygapophyseal joints in the posterior third of the vertebral bodies.
3)the long axis of the stomach foreshortened with a closed lesser curvature.
4)the pylorus in the center of the exposure field.
A) 1 and 4 only
B) 1, 2, and 3 only
C) 2, 3, and 4 only
D) 1, 2, 3, and 4
Q2) Adequate large intestine distention and mucosal covering has been obtained when A) the mucosal folds are demonstrated.
B) a thin coating of barium covers the mucosal surface.
C) the barium pool is limited to half the intestinal diameter.
D) the barium is pooled in the dependent surface.
Q3) The air contrast is demonstrated in the ____ on a PA stomach and duodenum projection.
A) fundus
B) pylorus
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Page 14