CT Simulated Exam Images 1

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sully79
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308000
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CT Simulated Exam Images 1
Updated:
2015-09-20 19:32:02
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CT Registry Review
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CT Images Review
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  1. 33. Number 1 on the figure corresponds to which of the following?
    A. left pulmonary artery
    B. inferior vena cava
    C. descending aorta
    D. ascending aorta
    A. left pulmonary artery
    (this multiple choice question has been scrambled)

  2. 34. Which number on the figure corresponds to the superior vena cava?
    A. 2
    B. 3
    C. 4
    D. 5
    C. 4
    (this multiple choice question has been scrambled)

  3. 35. The abnormal density located in the posterior portion of the left lung field on the figure has an average attenuation value of +5 Hounsfield units. This density most likely represents:
    A. pleural effusion
    B. atelactasis
    C. pneumothorax
    D. hemothorax
    A. pleural effusion

    Pleural effusions are commonly seen in the posterior portion of the lung field on images obtained with the patient in a supine position on the CT table. Differentiation between pleural effusion and pleural thickening is made when ROI measurements reveal fluid with density readings at or slightly above zero. Pleural effusion may be caused by multiple pathologic processes, including infection, neoplasm, and CHF.
    (this multiple choice question has been scrambled)

  4. 38. Number 2 on the figure corresponds to which of the following?
    A. left internal jugular vein
    B. left external carotid artery
    C. left internal carotid artery
    D. left external jugular vein
    C. left internal carotid artery
    (this multiple choice question has been scrambled)

  5. 39. Number 5 on the figure corresponds to which of the following?
    A. right internal carotid artery
    B. right internal jugular vein
    C. right external carotid artery
    D. right external jugular vein
    B. right internal jugular vein
    (this multiple choice question has been scrambled)

  6. 40. Number 1 on the figure corresponds to which of the following?
    A. uvula
    B. epiglottis
    C. vocal cords
    D. aryepiglottic fold
    B. epiglottis
    (this multiple choice question has been scrambled)

  7. 47. Number 5 on the figure corresponds to which of the following?
    A. duodenum
    B. transverse colon
    C. stomach
    D. hepatic flexure
    C. stomach
    (this multiple choice question has been scrambled)

  8. 48. Which of the following most likely describes the patient position during the formation of the image in the figure?
    A. right lateral decubitus
    B. left lateral decubitus
    C. supine
    D. prone
    A. right lateral decubitus

    The location of the liver on the inferior portion of the image indicates that this patient is in the right lateral decubitis position.
    (this multiple choice question has been scrambled)

  9. 49. CT examinations of the abdomen are often performed in the position on the figure to demonstrate the relationship between the:
    A. duodenum and pancreatic head
    B. ureters and renal collecting systems
    C. liver and gallbladder
    D. large and small colon
    A. duodenum and pancreatic head

    The right lateral decubitis position is often used to differentiate the pancreatic head and the duodenum.
    (this multiple choice question has been scrambled)

  10. 50. Number 3 on the figure corresponds to which of the following?
    A. right ureter
    B. renal calculi
    C. inferior vena cava
    D. right renal artery
    A. right ureter
    (this multiple choice question has been scrambled)

  11. 59. Which of the following corresponds to the low attenuation area indicated by Number 3 on the figure?
    A. renal pyramid
    B. renal pelvis
    C. renal cortex
    D. renal calyx
    A. renal pyramid

    The renal pyramids are cone-shaped regions of the renal medulla. The wider bases of the renal pyramids border the renal cortex.
    (this multiple choice question has been scrambled)

  12. 60. The data for this reformatted image of the abdomen was most likely acquired in which of the following renal enhancement phases?
    A. corticomedullary
    B. pre-contrast
    C. nephrographic
    D. excretory
    A. corticomedullary

    Beginning 30-40 seconds after the initiation of contrast agent administration, the corticomedullary phase demonstrates optimal enhancement of the renal cortex with maximum differentiation of the cortex from the renal medulla.
    (this multiple choice question has been scrambled)

  13. 61. Number 2 in the figure corresponds to which of the following?
    A. hepatic vein
    B. adrenal gland
    C. suprarenal lymph node
    D. common bile duct
    B. adrenal gland
    (this multiple choice question has been scrambled)

  14. 62. Number 6 on the figure corresponds to which of the following?
    A. erector spinae muscle
    B. piriformis muscle
    C. psoas muscle
    D. omentum
    C. psoas muscle
    (this multiple choice question has been scrambled)

  15. 66. Number 2 on the figure corresponds to which of the following?
    A. vestibule
    B. incus
    C. cochlea
    D. carotid canal
    C. cochlea
    (this multiple choice question has been scrambled)

  16. 67. Number 4 on the figure corresponds to which of the following?
    A. carotid canal
    B. internal auditory canal
    C. vestibule
    D. external auditory meatus
    A. carotid canal
    (this multiple choice question has been scrambled)

  17. 68. Which of the following display field of view (DFOV) values was most likely used to display the image?
    A. 25.6 cm
    B. 51.2 cm
    C. 9.6 cm
    D. 18.0 cm
    C. 9.6 cm

    Targeted reconstructions should be performed bilaterally utilizing a small DFOV or a higher zoom factor to maximize resolution of the small bony components of the inner ear.
    (this multiple choice question has been scrambled)

  18. 69. Number 3 on the figure corresponds to which of the following?
    A. cochlea
    B. incus
    C. semicircular canal
    D. vestibule
    D. vestibule
    (this multiple choice question has been scrambled)

  19. 77. The pathologic process indicated by Number 3 on the figure most likely corresponds to:
    A. lymphadenopathy
    B. ground-glass opacity
    C. atelectasis
    D. pleural effusion
    B. ground-glass opacity

    Ground-glass opacities are hazy areas of increased attenuation in the lungs and are often associated with interstitial lung disease evaluated by HRCT.
    (this multiple choice question has been scrambled)

  20. 78. Number 1 on the figure corresponds to which of the following?
    A. ascending aorta
    B. right atrium
    C. right ventricle
    D. pulmonary trunk
    A. ascending aorta
    (this multiple choice question has been scrambled)

  21. 79. This HRCT image of the chest was most likely acquired with a section width of:
    A. 7mm
    B. 5mm
    C. 10mm
    D. 1mm
    D. 1mm

    HRCT acquisitions of the chest should be performed with thin sections, within the range of 1-2mm.
    (this multiple choice question has been scrambled)

  22. 80. Number 2 on the figure corresponds to which of the following?
    A. left mainstem bronchus
    B. anterior segment of left lower lobe bronchus
    C. posterior segment of left upper lobe bronchus
    D. anterior segment of left upper lobe bronchus
    D. anterior segment of left upper lobe bronchus
    (this multiple choice question has been scrambled)

  23. 83. Number 7 on the figure corresponds to which of the following?
    A. gallbladder
    B. jejunum
    C. duodenum
    D. pancreatic head
    D. pancreatic head
    (this multiple choice question has been scrambled)

  24. 84. Number 2 on the figure corresponds to which of the following?
    A. renal artery
    B. superior mesenteric artery
    C. superior mesenteric vein
    D. portal vein
    C. superior mesenteric vein
    (this multiple choice question has been scrambled)

  25. 85. Number 8 on the figure corresponds to which of the following?
    A. descending colon
    B. ascending colon
    C. duodenum
    D. jejunum
    B. ascending colon
    (this multiple choice question has been scrambled)

  26. 89. Number 1 on the figure corresponds to which of the following?
    A. maxillary sinus
    B. ethmoid sinus
    C. frontal sinus
    D. sphenoid sinus
    C. frontal sinus
    (this multiple choice question has been scrambled)

  27. 90. The section thickness that would demonstrate the greatest detail of the paranasal sinuses is:
    A. 3mm
    B. 5mm
    C. 7mm
    D. 10mm
    A. 3mm

    The section thickness of a CT scan directly affects the detail and spatial resolution of the image. Narrow section widths result in greater detail for imaging of small anatomic parts such as the sinuses.
    (this multiple choice question has been scrambled)

  28. 91. Which number on the figure corresponds to the zygomatic bone?
    A. 1
    B. 6
    C. 3
    D. 2
    D. 2
    (this multiple choice question has been scrambled)

  29. 96. Number 4 on the figure corresponds to which of the following?
    A. cuboid
    B. calcaneus
    C. navicular
    D. talus
    A. cuboid
    (this multiple choice question has been scrambled)

  30. 97. Which of the following best describes the type of image displayed in the figure?
    A. sagittal maximum intensity projection (MIP)
    B. sagittal multiplanar reformation (MPR)
    C. direct sagittal acquisition
    D. volume-rendered 3D
    B. sagittal multiplanar reformation (MPR)
    (this multiple choice question has been scrambled)

  31. 98. Number 6 on the figure corresponds to which of the following?
    A. cuboid
    B. calcaneus
    C. talus
    D. navicular
    D. navicular
    (this multiple choice question has been scrambled)

  32. 99. Number 1 on the figure corresponds to which of the following?
    A. calcaneus
    B. talus
    C. cuboid
    D. navicular
    B. talus
    (this multiple choice question has been scrambled)

  33. 102. Which number on the figure corresponds to the anterior horn of the lateral ventricle?
    A. 5
    B. 2
    C. 1
    D. 3
    A. 5
    (this multiple choice question has been scrambled)

  34. 103. Number 3 on the figure corresponds to which of the following?
    A. pineal gland
    B. thalamus
    C. caudate nucleus
    D. third ventricle
    B. thalamus
    (this multiple choice question has been scrambled)

  35. 104. Which number on the figure corresponds to the septum pellucidum?
    A. 4
    B. 2
    C. 3
    D. 5
    A. 4
    (this multiple choice question has been scrambled)

  36. 128. Which of the following components of CT image quality are being evaluated in the figure?
    1. low-contrast detectability
    2. noise
    3. uniformity
    A. 2 only
    B. 1 and 2 only
    C. 2 and 3 only
    D. 1 and 3 only
    C. 2 and 3 only

    Noise is most commonly measured by scanning a water filled phantom with a consistent set of technical factors. The image noise is equal to the standard deviation of pixel values within a region of interest (ROI) measurement of the image.  Uniformity may also be evaluated by positioning several ROI measurements at different locations along the center and periphery of the image. The CT values should not differ by more than 2 HU from one location to another.
    (this multiple choice question has been scrambled)

  37. 129. The differences in Hounsfield value exhibited in the ROIs measured on this CT image of a water filled phantom are most likely due to the phenomenon referred to as:
    A. beam hardening
    B. noise
    C. detector drift
    D. partial volume averaging
    A. beam hardening

    Beam hardening occurs as low-energy x-ray photons are absorbed while the beam passes through the patient. The average photon energy of the beam increases along the path and may result in a loss of system uniformity.
    (this multiple choice question has been scrambled)

  38. 130. Which region of interest (ROI) on the figure demonstrates the greatest amount of image noise?
    A. 3
    B. impossible to determine from the information provided
    C. 2
    D. 1
    D. 1

    The image noise is equal to the standard deviation of pixel values within an ROI measurement of the image. ROI on number 1 on the figure demonstrates the highest value for standard deviation (SD=2.87).
    (this multiple choice question has been scrambled)

  39. 152. The artifact present on the lateral borders of the image in the figure most likely represents which of the following?
    A. tube arcing
    B. edge gradient
    C. beam hardening
    D. out-of-field artifact
    D. out-of-field artifact

    The artifact present in the figure most likely represents an out-of-field artifact. This relatively large patient was incorrectly positioned, and a portion of the anatomy lies outside the Scanned FOV. This improperly centered anatomy interferes with the reference detectors, thus causing a streak artifact near the unscanned area.
    (this multiple choice question has been scrambled)

  40. 153. The image in the figure was produced using the following parameters: large (full) SFOV; maximum DFOV (48cm); 200 mA, 120 kVp; soft tissue algorithm. Which of the following technical adjustments would serve to reduce the artifact present?
    A. switching to a detail or bone algorithm
    B. increasing the mA to 240 and the kVp to 140
    C. using a smaller SFOV
    D. centering the patient within the SFOV
    D. centering the patient within the SFOV

    The out-of-field artifact present in this image could be easily reduced by properly centering the patient within the scan field of view.
    (this multiple choice question has been scrambled)

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