PET/CT EXAM 1 QUESTIONS AND ANSWERS (GRADED A)PET/CT EXAM 1 QUESTIONS AND ANSWERS (GRADED A)PET/CT EXAM 1 QUESTIONS AND ANSWERS (GRADED A)PET/CT EXAM 1 QUESTIONS AND ANSWERS (GRADED A)
The basic premise of computed tomography is to create images in a variety of anatomic planes that show ____. - AN...
PET/CT EXAM 1 QUESTIONS AND
ANSWERS (GRADED A)
The basic premise of computed tomography is to create images in a variety of anatomic
planes that show ____. - ANSWER-internal structures free of superimposition
These display the patient's anatomy in full and precise detail - ANSWER-Slices
Pivotal point where no motion occurs in conventional tomography is called _________. -
ANSWER-fulcrum
Divides the body into an inferior and superior plane? - ANSWER-transverse
Areas of high density in CT image appear ______________ - ANSWER-white
These control brightness and contrast __________and _________. - ANSWER-window
width; window level
Hounsfield unit is based on ____________ - ANSWER-density
These improve the relevance and diagnostic quality of a scan for each patient's
condition__________. - ANSWER-axial and coronal images
What generation of scanner made spiral or helical motion possible? - ANSWER-Sixth
generation
Before the data acquired in the scan can be used, the ____must be processed through
a series of steps to produce what we recognize as a useable CT image. - ANSWER-raw
data
Refers to the way in which the x-ray beam is emitted from the x-ray tube housing,
passes through the patient, and is acquired by the CT detectors - ANSWER-Beam
geometry
In what kind of scanning is an entire volume of data is acquired without the motion of
the x-ray tube stopping? - ANSWER-Spiral or helical scanning
The ________ is the mounted framework that surrounds the patient as the table moves
during acquisition. - ANSWER-gantry
The impact of the _____on the anode during x-ray production generates an enormous
amount of heat. - ANSWER-high energy electrons
, The ___setting of the CT scanner controls the movement of the table through the gantry
and is the distance the table travels during one revolution of the x-ray tube. - ANSWER-
pitch
"beam pitch" and is calculated as...... - ANSWER-table mvmt per rotation/beam width
When the pitch ________, patient dose ________ because of shorter exposure to the x-
ray beam. - ANSWER-increases; decreases
Tomography - ANSWER-a technique for displaying a representation of a cross-section
through a human body or other solid object using x-rays or ultrasound
Characteristic xrays - ANSWER-when an atom in the target of the x-ray tube has been
ionized and then the inner shell electron is removed, leaving the atom ionized; when
outer shell electrons drop in to fill this lower shell vacancy
Trans axial tomography - ANSWER-a type of view in CT that distinguishes between
body tissue
The________, ________, and ____________are found inside the gantry, as well as the
generator, in most systems. - ANSWER-x-ray tube, cooling system, and data acquisition
system
Measure the x-ray attenuation after the beam has passed through the patient, are
located in a panel array opposite the x-ray tube. - ANSWER-Gas ionization/ scintillation
detectors
Collimation limits the amount of x-ray exposure to the patient by focusing the beam to
only the __ and _________to improve image contrast. - ANSWER-anatomy of interest
and reduce scatter
A localizer image is essential for every CT scan, and is also called a___, ______,
_____, _______, or _________. - ANSWER-scout, topogram, pilot, scanogram, or
survey
22. Scout lengths are measured in ___________. - ANSWER-millimeters
Where is AP scout tube positioned? - ANSWER-Above patient
Where is lateral scout tube positioned? - ANSWER-90 degrees from AP
A _____reduces the likelihood of patient motion during the scan, as well as problems
that arise when patients must hold their breath multiple times. - ANSWER-helical scan
25. The _______must be slightly larger than the anatomical area of interest. -
ANSWER-scan FOV
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 $12.99. You're not tied to anything after your purchase.
