Exam (elaborations)
ARRT CT Registry Review Exam With Correct Answers.
- Course
- Institution
ARRT CT Registry Review Exam With Correct Answers.
[Show more]
Seller
Follow
Content preview
ARRT CT Registry Review Exam WithCorrect Answers
Absorbed dose - answer-the amount of energy absorbed per unit mass
b b b b b b b b b b
(grays or rads) b b
back projection - answer-- 3rd step in IR loop of iterative reconstruction algorithm
b b b b b b b b b b b b
- ray sum data are projected back onto a matrix.
b b b b b b b b b
blood urea nitrogen (BUN) - answer-renal function (nitrogen in blood)
b b b b b b b b b
(7-25mg/dl)
bow-tie filter - answer-Filter compensating for a cylindrical shape (body)
b b b b b b b b b
-filter is thicker at the ends
b b b b b
contiguous images - answer-images with equal section thicknesses & reconstruction
b b b b b b b b b
intervals
b
Aliasing - answer-streak artifact caused by insufficient views (data samples) obtained
b b b b b b b b b b
during data acquisition
b b b
Algorithm - answer-(AKA kernal) b b b b
filter applied to raw data during reconstruction to remove blurring artifacts
b b b b b b b b b b
Afterglow - answer-detector continues to glow after radiaiton is terminated (scintillation-
b b b b b b b b b b
type scanners) b
absorption efficiency - answer-ability of an individual CT detector to absorb & measure
b b b b b b b b b b b b
the transmitted x-ray intensity incident upon it
b b b b b b b
ALARA - answer-As Low As Reasonably Achievable
b b b b b b
Analog-to-Digital Converter (ADC) - answer-converts electrical signal to digital form
b b b b b b b b b
(part of the DAS)
b b b
array processor - answer-reviews raw data & performs all major processing of image
b b b b b b b b b b b b
arterial phase - answer-peak arterial enhancement following the bolus IV administration
b b b b b b b b b b
of iodinated contrast material.
b b b b
Artifact - answer-noise on an image
b b b b b
, ataxia - answer-lack of muscle coordination
b b b b b
Attenuation - answer-reduction in intensity of a radiation beam as it passes through a
b b b b b b b b b b b b b
substance
b
attenuation coefficient - answer-value given to an object rating its ability to absorb an x-
b b b b b b b b b b b b b b
ray beam b
automatic tube current modulation (ATCM) - answer-software used to adjust the mA
b b b b b b b b b b b
throughout an acquisition to reduce patient dose
b b b b b b b
Automatic Tube Voltage Selection (ATVS) - answer-software used to adjust kVp based
b b b b b b b b b b b
on the changing attenuation along the scan range to reduce patient dose
b b b b b b b b b b b b
beam hardening - answer-the increase in average energy of x-ray beam as it penetrates
b b b b b b b b b b b b b
tissue
b
contrast resolution - answer-ability to detect an object with a small difference in
b b b b b b b b b b b b
attenuation from surrounding tissue
b b b b
Contrast Induced Nephropathy (CIN) - answer-substantial decline in renal function after
b b b b b b b b b b
a patient receives IV contrast
b b b b b
Convolution - answer-filter used to remove blurring artifact during back-projection
b b b b b b b b b
Creatinine - answer-indication of renal function b b b b b b
(0.5-1.5mg/dl)
CT dose index (CTDI) - answer-an approximate measure of the radiation dose received
b b b b b b b b b b b b
in a single slice
b b b b
cupping artifact - answer-Middle of the image appears darker than periphery.
b b b b b b b b b b
data acquisition system (DAS) - answer-electronic components of a CT system
b b b b b b b b b b
responsible for measuring the transmitted x-radiation absorbed by the detectors
b b b b b b b b b b
Diastole - answer-relaxation phase of the heart
b b b b b b b
(bottom # of BP) b b b
display field of view (DFOV) - answer-scan factor measured from the center of the pt. to
b b b b b b b b b b b b b b b
the most distant edge of the pt.
b b b b b b b
dose length product (DLP) - answer-dose for the entire series of images
b b b b b b b b b b b
DLP Equaision - answer-DLP = CTDIvol x Scan length
b b b b b b b b
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 ParadisePro. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.99. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
82871 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now