Exam (elaborations)
COMPUTED TOMOGRAPHY TEST PREP QUESTIONS AND ANSWERS
- Course
- Institution
COMPUTED TOMOGRAPHY TEST PREP QUESTIONS AND ANSWERS
[Show more]
Content preview
CT BOARD REVIEW - MEDICAL CTREGISTRY EXAM REVIEW QUESTIONS
WITH COMPLETE SOLUTIONS
What is an advantage of scans of the pituitary taken in the coronal plane?
A.) IV contrast material is better visualized.
B.) Streak artifacts are reduced or eliminated.
C.) The patient is more comfortable during scanning.
D.) The patient receives a lower radiation dose. - Answer-B.) Streak artifacts are
reduced or eliminated.
Which two strategies can reduce the effect of dental fillings in a sinus study?
A.) High mA and short scan time.
B.) Low kVp and high contrast, or bone algorithm.
C.) Adjust the angle of the gantry and widen the window width.
D.) Small focal spot and small display field. - Answer-C.) Adjust the angle of the gantry
and widen the window width.
Which of the following conditions may be visualized in a CT study of the brain?
A.) Glioblastoma
B.) Wilm's Tumor
C.) Krukenberg Tumor
D.) Plasmacytosis - Answer-A.) Glioblastoma
Which of the following is affected by the slice spacing in a CT study?
A.) Spatial Resolution
B.) Quantum Mottle
C.) Radiation Dose to the Patient
D.) Signal-to-Noise Ration - Answer-C.) Radiation Dose to the Patient
What is the name of the pinecone-shaped structure of the brain the can often be seen
as calcified in CT images? - Answer-Pineal Gland
Third generation (rotate/rotate) scanners overcame which of the following limitations?
A.) Detector singal drift sensitivity
B.) Translation motion
C.) Spurious signals from moving signal wires
D.) Cost - Answer-B.) Translation motion
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? - Answer-Pitch
, What determines the section thickness? - Answer-Incident beam collimation
What effect would an array processor failure have on image processing? - Answer-
Increase image display time.
What change will occur in the number of detected photons if a section thickness is
changed from 5 mm to 10mm? - Answer-Increase 100%
Which of the following will magnify the image?
A.) Increase the field of view.
B.) Decreasing field of view.
C.) Increasing section thickness.
D.) Decreasing section thickness. - Answer-D.) Decreasing field of view.
Which of the following is convolution?
A.) Filtered back projection
B.) Fourier transform
C.) Iterative filtration
D.) 3-d rendering - Answer-A.) Filtered back projection
Which of the following determines the maximum number of shades of gray that can be
displayed on the CT monitors?
A.) Window level
B.) Window width
C.) Pixel size
D.) Matrix size - Answer-B.) Window width
Which of the following are benefits of narrower section thicknesses?
Reduced partial volume averaging and improved spatial resolution
Decreased scan time, and more anatomy covered - Answer-Reduced partial volume
averaging and improved spatial resolution
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.) Linear attenuation coefficient.
B.) Partial volume averaging.
C.) Low contrast resolution.
D.) Edge gradient averaging. - Answer-Partial volume averaging.
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.) Ct numbers above +300
B.) Ct numbers between +150 and +300
C.) Ct numbers between +150 and -150
D.) Ct numbers below -150 - Answer-C.) Ct numbers between +150 and -150
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller biggdreamer. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $14.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
72042 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now