We have sent an email with your new password.


Ct Registry Review Questions

91 Questions  I  By Akuhlman
Computed Tomography Quizzes & Trivia
Question for Computed Tomography Registry

  
Changes are done, please start the quiz.


Question Excerpt

Removing question excerpt is a premium feature

Upgrade and get a lot more done!
1.  What is an advantage of scans of the pituitary taken in the coronal plane?
A.
B.
C.
D.
2.  Which two strategies can reduce the effect of dental fillings in a sinus study?
A.
B.
C.
D.
3.  Which of the following conditions may be visualized in a CT study of the brain?
A.
B.
C.
D.
4.  Which of the following is affected by teh slice spacing in a CT study?
A.
B.
C.
D.
5.  What is the name of the pinecon-shaped structure of the brain the can often be seen as calcified in CT images?
A.
B.
C.
D.
6.  Third generation (rotate/rotate) scanners overcame which of the following limitations?
A.
B.
C.
D.
7.  What helical or spiral computed tomography term is defined as the table increment in distance per mm per 360 degrees gantry rotation divided by the section thickness in mm?
A.
B.
C.
D.
8.  What determines the section thickness?
A.
B.
C.
D.
9.  What effect would an array processor failure have on image processing?
A.
B.
C.
D.
10.  What change will occur in the number of detected photons if a section thickness is changed from 5 mm to 10mm?
A.
B.
C.
D.
11.  Which of the following will magnify the image?
A.
B.
C.
D.
12.  Which of the following is convolution?
A.
B.
C.
D.
13.  Which of the following determines the maximum number of shades of gray that can be displayed on the CT monitors?
A.
B.
C.
D.
14.  Which of the following are benefits of narrower section thicknesses?
A.
B.
15.  Which of the following is the term used to describe a voxel value that is the average of multiple tissue types contained within the voxel?
A.
B.
C.
D.
16.  Which of the following CT numbers would appear as a gray shades when a window width of 300 and a window level of 0 are selected?
A.
B.
C.
D.
17.  Which fo the following is the central value in a range of gray shades used to display the image?
A.
B.
C.
D.
18.  What is the most common type of film used to recore CT exams?
A.
B.
C.
D.
19.  Which of the following increase signal to noise ration?
A.
B.
C.
20.  What is the appropriate compensation to avoid quantum noise when performing thin section computed tomography?
A.
B.
C.
D.
21.  Which describes the relationship between section thickness and noise?
A.
B.
C.
D.
22.  What term is used to describe as the ability to display an image of a large object that is only slightly different in density from its surroundings?
A.
B.
C.
D.
23.  Which of the following should be viewed with relatively wide window widths?
A.
B.
C.
24.  How often should an average CT number water calibration test be performed?
A.
B.
C.
D.
25.  Which of the following accurately describes the relationship between patient dose and pitch?
A.
B.
C.
D.
26.  Which of the following is defined as the ability to distinguish details in objects of different densities a small distance apart?
A.
B.
C.
D.
27.  What is the term that is used to describe contrast resolution?
A.
B.
C.
D.
28.  What is the primary type of interaction that contributes to the subject contrast in CT images?
A.
B.
C.
D.
29.  What type of scan geometry is responsible for producing ring artifacts?
A.
B.
C.
D.
30.  What is the cause for the "cupping" artifact?
A.
B.
C.
D.
31.  Which of the following can be described as bands and streaks that appear across an area due to bone and soft tissue attenuation values in the same pixel?
A.
B.
C.
D.
32.  Which of the following is a streak artifact oriented tangentially to a flat surface having a high spatial frequency?
A.
B.
C.
D.
33.  What filter selection would provide the best detail for imaging of the internal auditory canals?
A.
B.
C.
D.
34.  What anatomical structure forms a roof over the posterior cranial fossa and is shaped like a tent?
A.
B.
C.
D.
35.  What type of artifact generally appears as a dark horizontal line through the petrous ridges?
A.
B.
C.
D.
36.  Which of following results from a fracture in the temporal region of the skull with associated tearing of the middle meningeal artery?
A.
B.
C.
D.
37.  What canal allows communication between the third and fourth ventricles of the brain?
A.
B.
C.
D.
38.  Where is contrast media introduced for a myelography exam of the spinal canal?
A.
B.
C.
D.
39.  Which of the following would be visualized first when coronal images are obtained via multiplanar reformation from posterior to anterior?
A.
B.
C.
D.
40.  Which of the following anatomical structures would be visualized first when obtaining sagittal sections from right to left?
A.
B.
C.
D.
41.  What type of drug is Demerol?
A.
B.
C.
D.
42.  Which of the following describes rapid, irregular, ineffective twitches of the ventricles?
A.
B.
C.
D.
43.  Which of the following is the more toxic cation that is incorporated into the organic ionic contrast media?
A.
B.
C.
D.
44.  What term is used to describe the computed tomography appearance of an intracerebral hemorrhage as a result of a higher CT number of the hemorrhage as compared to normal brain tissue?
A.
B.
C.
D.
45.  Which of the following provides optimal liver lesion detection following the introduction of contras media?
A.
B.
C.
46.  Which of the following is the recommended percentage of barium in a barium sulfate suspension utilized in abdominal computed tomography?
A.
B.
C.
D.
47.  Which of the following are used in scintillation CT detectors?
A.
B.
C.
48.  Which of the following will have an effect on image quality?
A.
B.
C.
49.  What are the primary advantages of narrower section thicknesses?
A.
B.
C.
50.  Which of the following geometric factors will have an effect on spatial resolution?
A.
B.
C.
51.  What term describes an artifact that may appear on a low dynamic range detector system near the shoulders and hips because dense bone has too severely attenuated the xray beam?
A.
B.
C.
D.
52.  Which of the following will help to reduce partial volume artifacts?
A.
B.
C.
D.
53.  Which of the following terms defines the increase in the mean energy of a polychromatic beam as it passes through an object?
A.
B.
C.
D.
54.  Contrast materials that dissociate into charged particles when placed into solution are termed
A.
B.
C.
D.
55.  Which of the following is the correct order for the stages of infection?
A.
B.
C.
D.
56.  The term used to descibe the ability of a fluid to flow is
A.
B.
C.
D.
57.  A patient has a severe vagal reaction to iodinated contrast material that includes bradycardia.  Initial treatment may include
A.
B.
C.
D.
58.  Which of the following interactions between xray and matter results in the largest amount of occupational exposure?
A.
B.
C.
D.
59.  The abdominal aorta bifurcates at the level of
A.
B.
C.
D.
60.  After the injection of intravenous contrast material during a CT examination of the brain, which of the following anatomic areas does not enhance?
A.
B.
C.
D.
61.  The mathematical technique that involves the estimation of an unknown value from values on either side of it its known as
A.
B.
C.
D.
62.  When compared with conventional radiography, CT produces diagnostic images with improved
A.
B.
C.
D.
63.  Which of the following is not commonly used as a CT scintillation detector material?
A.
B.
C.
D.
64.  Which of the following is the primary interaction between xray photons and tissue during CT examinations?
A.
B.
C.
D.
65.  Areas of a CT image that contain minimal changes in tissue density are electronically represented by 
A.
B.
C.
D.
66.  Which of the following reconstruction methods is used by most modern CT scanners?
A.
B.
C.
D.
67.  Which of the following increases the signal-to-noise ratio of a CT image?
A.
B.
C.
D.
68.  Statistical noise appears as ___ on a CT image
A.
B.
C.
D.
69.  The term ___ describes the ability of a CT scanner to differentiate objects with minimal differences in attenuation coefficients
A.
B.
C.
D.
70.  Which of the following types of contrast material may be used during a CT examination of the chest?
A.
B.
C.
D.
71.  The kidneys are located in the retroperitoneum and are bound by a band of fibrous connective tissue called
A.
B.
C.
D.
72.  Which of the following algorithm types provides the greatest soft-tissue detail during a CT study of the pelvis?
A.
B.
C.
D.
73.  First-generation CT scanners possess which of the following characteristics?
A.
B.
C.
D.
74.  The average CT value for blood is approximately
A.
B.
C.
D.
75.  Before a CT image can be reconstructed by a computer, the transmission signal produced by the detectors must be converted into numeric information by a(n)
A.
B.
C.
D.
76.  The dimensions of a voxel may be calculated as the product of which of the following?
A.
B.
C.
D.
77.  Which of the following terms are commonly used to describe the ability of a CT scanner to differentiate objects with similar linear attenuation coefficients?
A.
B.
C.
D.
78.  Which of the following section widths would cause the greatest amount of partial volume averaging?
A.
B.
C.
D.
79.  Which of the following has no measurable effect on spatial resolution?
A.
B.
C.
D.
80.  An image that is reconstructed a second time with some change in technical factor is termed _____.
A.
B.
C.
D.
81.  During CT angiography, images may be reconstructed using only the greastest density encountered along each ray.  This type of specialized CT image is called a(n)
A.
B.
C.
D.
82.  The ability of a CT scanner to image a small high-density object is controlled by ___ of the scanner
A.
B.
C.
D.
83.  Which of the following technical changes may increase the partial volume effect present on a spiral CT scan?
A.
B.
C.
D.
84.  The matrix size describes which of the following?
A.
B.
C.
85.  The type of filter used at the xray tube of a CT scanner is called a
A.
B.
C.
D.
86.  Which of the following would increase the noise of a CT image?
A.
B.
C.
D.
87.  The interaction between xray and matter that is responsible for the production of the scatter radiation absorbed by the patient and detectors is
A.
B.
C.
D.
88.  The major disadvantage of the back-projection method of image reconstruction is the appearance of the
A.
B.
C.
D.
89.  The contast resolution of a CT scanner is not related to which of the following?
A.
B.
C.
D.
90.  The intensity of the CT xray beam can be increased by
A.
B.
C.
D.
91.  Which of the following is a solid-state device used to record the light flashes given off by a scintillation crystal?
A.
B.
C.
D.
Back to top

Removing ad is a premium feature

Upgrade and get a lot more done!
Take Another Quiz