100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
CT MOCK EXAM PAPER #2 QUSTIONS WITH COMPLETE ANSWERS $24.49   Add to cart

Exam (elaborations)

CT MOCK EXAM PAPER #2 QUSTIONS WITH COMPLETE ANSWERS

 7 views  0 purchase
  • Course
  • Computed Tomography
  • Institution
  • Computed Tomography

CT MOCK EXAM PAPER #2 QUSTIONS WITH COMPLETE ANSWERS

Preview 4 out of 83  pages

  • August 18, 2024
  • 83
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • Computed Tomography
  • Computed Tomography
avatar-seller
biggdreamer
CT MOCK EXAM PAPER #2 QUSTIONS
WITH COMPLETE ANSWERS
The multiple-scan average dose (MSAD) is used to describe the:

a. dose received in a single CT section
b. amount of radiation absorbed in a quantity of air
c. average dose to a single section within a scan of multiple sections
d. cumulative dose for an entire helical scan - Answer-c. average dose to a single
section within a scan of multiple sections

The number of electrons that flow from the cathode to the anode in the tube is
controlled by the:

a. mA
b. anode target
c. collimation
d. kV - Answer-a. mA

Which of the following has the highest patient dose assuming all other parameters are
the same?

a. mA=150, rotation time=3 seconds
b. mA=400, rotation time=1 second
c. mA=200, rotation time=2 seconds
d. mA=200, rotation time=1 second - Answer-a. mA=150, rotation time=3 seconds

Which of the following may result from exposing embryo to x-ray radiation?

a. deformities
b. miscarriage
c. mental retardation
d. All of the above - Answer-d. All of the above

On a multi-row detector scanner, a radiation penumbra may be found:

a. on evry other slice
b. on every slice
c. only on the trailing edges of the slices
d. only on the first and last slices of the slice volume - Answer-d. only on the first and
last slices of the slice volume

Increasing _________ results in lowering the patient dose.

,a. pitch
b. table increment
c. mAs - Answer-a. pitch
b. table increment

A 25 year old female is scheduled for a CT scan of the sinuses. She is not absolutely
certain that she is not pregnant and it has been three weeks since her last menstrual
period. Which of the following is the best course of action?

a. perform the exam immediately, while she is experiencing sinus problems
b. postpone the procedure until she is more certain of her condition
c. cancel the procedure indefinitely
d. suggest she get an MRI instead - Answer-b. postpone the procedure until she is more
certain of her condition

Which of the following units is used to quantify effective dose?

a. roentgens (R)
b. grays (Gy)
c. sieverts (Sv)
d. curies (Ci) - Answer-c. sieverts (Sv)

Which of the following could be the dose experienced by the pituitary from a typical CT
brain scan?

a. 5 mGy
b. 9 rads
c. 2 rads
d. 1 mGy - Answer-c. 2 rads

Which of the following is a possible long-term effect of repeated exposure to radiation?

a. cataracts
b. cancer
c. decrease in life expectancy
d. all of the above - Answer-d. all of the above

Which of the following does NOT minimize the radiation dose to the patient?

a. decreasing the distance from the x-ray tube to the patient
b. filtration of the low energy photons from the x-ray beam
c. increasing the pitch
d. pre-patient collimation - Answer-a. decreasing the distance from the x-ray tube to the
patient

,On a single-row detector scanner, which of the following does NOT decrease the patient
dose?

a. decreasing the scan time while leaving the MA constant
b. reformat the datta instead of re-scanning
c. increasing the pitch
d. decreasing the slice thickness while covering the same anatomical - Answer-d.
decreasing the slice thickness while covering the same anatomical

If there is no overlap or gap between adjacent slices of a CT scan, CTDI __________
MSAD.

a. equals
b. is less than
c. is slightly greater than
d. is much greater than - Answer-a. equals

Which of the following is TRUE regarding a radiation penumbra?

a. it occurs because the collimator is broken
b. it is accounted for in the calculation of the MSAD
c. it is radiation that extends outside of the imaging region - Answer-b. it is accounted
for in the calculation of the MSAD
c. it is radiation that extends outside of the imaging region

To modify a standard CT protocol so that it is appropriate for children, which of the
following should be decreased?

a. pitch
b. kVp
c. mAs - Answer-b. kVp
c. mAs

Which of the following reduces patient dose at the expense of increasing the apparent
noise in the image?

a. pitch
b. mAs
c. table increment
d. kVp - Answer-b. mAs

Which of the following is the correct action to take if a patient arrives with obvious head
trauma, expecting a CT of the brain, but the paperwork requests a pelvic CT?

a. request clarification from the ordering physician
b. perform only a scan of the brain

, c. perform both exams
d. perform only a scan of the pelvis - Answer-a. request clarification from the ordering
physician

During a CT scan, the patient must be monitored:

a. by a pulse oximeter
b. occasionally
c. visually and verbally
d. by a nurse - Answer-c. visually and verbally

The average CT value for blood is approximately:

a. -50 HU
b. 0 HU
c. +45 HU
d. +100 HU - Answer-c. +45 HU

Which of the following manipulations involves the use of image data?

a. adjusting the width and level of a window setting
b. decreasing the DFOV
c. changing the algorithm selection
d. increasing the matrix size - Answer-a. adjusting the width and level of a window
setting

Which of the following window level and width settings were used to display this image?

a. level= -700, width= 2000
b. level= +50, width= 400
c. level= +150, width= 1000
d. level= +250, width= 4000 - Answer-d. level= +250, width= 4000

Which of the following types of image noise can be most easily reduced by the CT
technologist?

a. electronic noise
b. artifactual noise
c. quantum noise
d. detector noise - Answer-c. quantum noise

When one is choosing a window to display a CT image, the width defines the:

a. midpoint of the range of pixels displayed
b. range of CT numbers (pixels) to be displayed
c. range of pixel values included in an ROI

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

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

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

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 $24.49. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

80364 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$24.49
  • (0)
  Add to cart