Diagnostic Imaging
Mock Exam
Course Introduction
Diagnostic Imaging is a comprehensive course that introduces students to the fundamental principles and techniques used in medical imaging to diagnose diseases and conditions. The course covers the physical and technological basis of common imaging modalities such as X-ray, computed tomography (CT), magnetic resonance imaging (MRI), ultrasound, and nuclear medicine. Emphasis is placed on image interpretation, safety protocols, clinical indications, and the role of imaging in patient management. Through a combination of lectures, case studies, and practical sessions, students will develop the skills needed to select appropriate imaging methods, understand imaging findings, and collaborate effectively with healthcare professionals in a clinical setting.
Recommended Textbook
Radiographic Imaging and Exposure 5th Edition by Terri L. Fauber
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10 Chapters
621 Verified Questions
621 Flashcards
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Chapter 1: Radiation and Its Discovery
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42 Verified Questions
42 Flashcards
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Sample Questions
Q1) In conjunction with ALARA,which of the following cardinal principles help to minimize radiation exposure?
I.Time-Increase time exposed to ionizing radiation
II.Time-Decrease time exposed to ionizing radiation
III.Distance-Increase distance from ionizing radiation
IV.Distance-Decrease distance from ionizing radiation
V.Shielding-Maximize use of shielding from ionizing radiation
A) I, III, and V
B) I, IV, and V
C) II, III, and V
D) II, IV, and V
Answer: C
Q2) X-rays carry a negative charge that causes ionization.
A)True
B)False
Answer: False
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Chapter 2: The X-Ray Beam
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66 Verified Questions
66 Flashcards
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Sample Questions
Q1) What is the name of the fixed physical area on the anode target that is struck by the electron stream?
A) Focal spot
B) Focal point
C) Focal range
D) Any of the above
Answer: A
Q2) In order to produce 12 mAs,how long should the exposure time be when using 600 mA?
A) 0.002 s
B) 0.02 s
C) 0.2 s
D) 2 s
Answer: B
Q3) The amount of heat produced from any given exposure is called a:
A) heat unit.
B) three-phase generator.
C) focal track.
D) Hounsfield unit.
Answer: A
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Chapter 3: Image Formation and Radiographic Quality
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68 Verified Questions
68 Flashcards
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Sample Questions
Q1) The primary factor that affects film-screen density is the quantity of radiation reaching the IR.
A)True
B)False
Answer: True
Q2) Shape distortion includes:
A) magnification.
B) elongation.
C) size distortion.
D) all of the above.
Answer: B
Q3) An increase in the amount of unsharpness recorded on the image has what effect on the visibility of anatomic structures?
A) Increased contrast of anatomic structures
B) Decreased contrast of anatomic structures
C) Increased overall visibility
D) Decreased overall visibility
E) A and C
F) B and D
Answer: F
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Chapter 4: Digital Imaging
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101 Verified Questions
101 Flashcards
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Sample Questions
Q1) A system that can digitize and display a greater number of shades of gray will have ____________ contrast resolution.
A) increased
B) decreased
C) no
Q2) A method of describing the strength of the radiation exposure compared with the amount of noise apparent in the digital image is the:
A) signal-to-noise ratio.
B) contrast-to-noise ratio.
C) modulation transfer function.
D) detective quantum efficiency.
Q3) Which of the following is not a component of a flat-panel detector?
A) TFT array
B) X-ray converter
C) Glass substrate
D) Phosphor layer
Q4) The DQE is higher for DR when compared to CR.
A)True
B)False
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Chapter 5: Film-Screen Imaging
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69 Verified Questions
69 Flashcards
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Sample Questions
Q1) Which layer of the radiographic film is the active layer?
A) Protective layer
B) Base
C) Phosphor layer
D) Emulsion
Q2) A safelight fog quality control test should be performed:
A) daily.
B) weekly.
C) quarterly.
D) semiannually.
Q3) If a film processor is turned on but hasn't been used for a while,in order to get the roller assembly moving,you will have to push the:
A) on/off switch.
B) replenishment switch.
C) standby control.
D) circuit breaker.
Q4) Increasing the film-screen speed requires a(n)_________ in mAs to maintain density.
A) increase
B) decrease
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Chapter 6: Exposure Technique Factors
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67 Verified Questions
67 Flashcards
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Sample Questions
Q1) With film-screen imaging,if the kVp were decreased by 15% and no changes were made to the mAs:
A) density would be unchanged, and contrast would decrease.
B) density would increase, and contrast would decrease.
C) density would decrease, and contrast would increase.
D) there would be no change in either contrast or density.
Q2) If a person stands 12 feet from the source of exposure,receives an exposure of 60 mR,and then moves to 3 feet from the source of exposure,what would be the new exposure according to the inverse square law?
A) 15 mR
B) 45 mR
C) 240 mR
D) 960 mR
Q3) With digital imaging,exposure factors do not need to be adjusted in order to visualize soft tissue.
A)True
B)False
Q4) Any increase in magnification results in a decrease in recorded detail.
A)True
B)False
Page 8
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Chapter 7: Scatter Control
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55 Flashcards
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Sample Questions
Q1) Increasing collimation results in reduced patient exposure,increased field size,and reduced scatter production.
A)True
B)False
Q2) The only reason a grid should be used is to increase radiographic contrast.
A)True
B)False
Q3) Which of the following is not a way to reduce the production of scatter radiation?
A) Reduce the exposure field size.
B) Reduce the tissue thickness.
C) Increase the grid ratio.
D) Ask a patient with a large abdomen to lie prone instead of supine.
Q4) An optimal AP abdomen radiograph can be produced using 40 mAs,75 kVp,and a 12:1 grid.How much mAs would be needed if the only grid available is a 6:1 ratio grid?
A) 20 mAs
B) 24 mAs
C) 67 mAs
D) 80 mAs
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Chapter 8: Exposure Technique Selection
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57 Verified Questions
57 Flashcards
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Sample Questions
Q1) What is the purpose of setting a backup time/mAs?
A) To prevent excessive exposure of the patient
B) To make certain the contrast is acceptable if the chosen kVp is too low
C) To make certain the density is acceptable if the patient moves
D) To prevent the selection of the wrong detector
Q2) The technique chart will provide information as to how to recognize and compensate for additive pathology.
A)True
B)False
Q3) Which automatic exposure device works by converting x-ray photons first into light and then into an electronic signal?
A) Phototimer
B) Gas detector
C) Ionization chamber
D) Backup timer
Q4) When exposure factors are selected using anatomically programmed technique,the variables should not be adjusted.
A)True
B)False
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Chapter 9: Image Evaluation
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25 Verified Questions
25 Flashcards
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Sample Questions
Q1) The visibility of anatomic structures in a radiographic image is determined by:
A) spatial resolution and image contrast.
B) brightness/density and image contrast.
C) spatial resolution and brightness/density.
D) all of the above.
Q2) Using a Konica digital imaging system,if an image's S number is 600 while the optimal range ends at 300,this means that the IR was ______________ and the exposure to the IR needs to be ___________________.
A) underexposed; doubled
B) under exposed; halved
C) overexposed; doubled
D) overexposed; halved
Q3) The amount of luminance (light emission)of a display monitor is the:
A) density.
B) contrast.
C) SID.
D) brightness.
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11
Chapter 10: Dynamic Imaging: Fluoroscopy
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71 Verified Questions
71 Flashcards
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Sample Questions
Q1) Which of the following most accurately shows the energy sequence during image-intensified fluoroscopy?
A) Light to x-rays to electrons to light
B) X-rays to light to electrons to light
C) X-rays to electrons to light
D) Electrons to light to electrons
Q2) Increasing the mA is the way to correct a fluoroscopic image that has:
A) noise.
B) pincushion appearance.
C) vignetting.
D) magnification.
Q3) The beam splitting mirror is never used with fiber optics.
A)True
B)False
Q4) Digital fluoroscopy is improved by using:
A) a vidicon camera.
B) videotape.
C) a beam splitting mirror.
D) a CCD.
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