NMTCB-CT QUESTIONS AND ANSWERS (GRADED A+)NMTCB-CT QUESTIONS AND ANSWERS (GRADED A+)Where are x-rays made? - ANSWER-in the electron shell structure of an atomWhere are x-rays made? - ANSWER-in the electron shell structure of an atom
What is Bremsstrahlung radiation? - ANSWER-energetic electrons ...
NMTCB-CT QUESTIONS AND ANSWERS
(GRADED A+)
Where are x-rays made? - ANSWER-in the electron shell structure of an atom
What is Bremsstrahlung radiation? - ANSWER-energetic electrons pass very near the
nucleus of an atom. The strong forces of th positive charged atom causes the negatively
charged electron to decelerate; the path of the electron is changed, and some of the
kinetic energy of the electron is lost, and converted into x-rays
what is characteristic x-ray radiation? - ANSWER-following the ionization of an atom
that leaves an inner shell, outer shell electrons drop down to refill the inner shell. As
these electrons drop down, they lose energy, which is released as x-rays.
What does pre-collimation do? - ANSWER-(used before x-rays enter the patient)
defines the beam shape and width (which is usually fan or cone shaped) and protects
the patient from excess radiation
What does post-collimation do? - ANSWER-(used to reduce scatter after leaving the
patient) is used before the radiation strikes the detectors
What are advantages of thinner collimation? - ANSWER-A: less volume averaging
B: increased spatial resolution
C: decreased spatial resolution
D: fewer artifacts
E: all of the above
F: a,b,d **
True or false: in CT, the gantry rotates continuously in one direction on a slip ring
system - ANSWER-true
What is a scout imaged used for? - ANSWER-Positioning /localization
Pitch - ANSWER-the ratio of patient's movements through the gantry during one 360
degree beam rotation relative to the beam collimation (in single slice CT)
In diagnostic CT, when might a change in pitch be useful? - ANSWER-when there is a
need for faster imaging time (during trauma, inability of the patient to
comply/cooperate/tolerate scanning, CTA)
What is the kilovolt potential (kvP)? - ANSWER-determines the kinetic energy given to
the emitted electrons produced from the potential difference between the cathode and
the anode-- designates the maximum x-ray energy
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 NursingTutor1. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.49. You're not tied to anything after your purchase.
