Compre Exam Flashcards
Which artifact is commonly seen in performing CT scan for the base of the skull
Beam Hardening Artifact
Which of the following principles define helical scanning except
uninterrupted table movement
Higher CT number
brighter
Converts light to electrical signal
photodiode
x-ray to light
scintillators
x-ray to light (phosphor layer)
IS :intensifies the emitted photon
reflective layer
Which modality has the best spatial resolution
xray
Which modality has the best contrast
MRI (but in terms of ct and xray the answer is ct)
Most common detector today preferred material
Gadolinium
Most common beam shaping device
Teflon
Most common detector element made with
ceramic material
Most common cause of x-ray table failure
Tungsten vaporization
What is/are the other names for scout
AOTA
(localizer, topogram, surview)
Mathematical formula in general
Algorithm
CT is superior in conventional radiography in terms of
contrast resolution
Conventional is superior in conventional radiography
in terms of
Spatial Resolution
In CT scan there are 2 sets
Pre patient/Pre
detector, Post patient
Filter
bow tie, flat
What is the 2 dimensional representation
Pixel
What is the 3 dimensional representation
Voxel
CT number for fat
-100
CT technique to visualize the venous vessels for the
blood
CT angiography
