Axial Resolution
Axial Resolution
Lateral Resolution
Focusing
Combo
100
True or False. A.R. Is adjustable
false
100
How is a short pulse created?
Less Ringing and higher frequency
100
What is L.R.
The ability to identify two structures that are close together when they are perpendicular to the sound beam's axis
100
How does Focusing improve lateral resolution?
concentrates the sound energy in a narrower beam
100
How many formulas does A.R have
3
200
What are the units of Axial Resolution?
mm or any other unit of distance
200
True or false.longer pulses improve axial resolution
False. Shorter
200
What question does L.R. answer
what is the minimum distance that two structures,positioned side by, can be apart and still produce two distinct echos.
200
When focusing what happens to the near zone length.
It is reduced
200
True or False. A.R is inversely proportional to frequency
True. A.R. (mm)= 0.77 X # Cycles in pulse/ Frequency (MHz)
300
What does axial resolution measure?
The ability of a system to display two structures that are very close together when the structures are parallel to the sound beams axis.
300
What is Axial Resolution related to?
Spatial Pulse Length
300
What are the units of L.R"
Any unit of distance. cm,mm
300
True or False. When Focusing the size of the focal zone is reduced
True
300
True to False. Beam Diameter equals Lateral resolution
True
400
Axial Resolution answers what question?
the minimum distance two structures, positioned parallel to the beam can be apart and still produce an accurate image
400
What is the numerical value range for clinical imaging?
Ranges from 0.1-1.0mm
400
What is L.R determined by
Width of the sound beam
400
Is phased array adjustable
Nope
400
True or False. High frequencies improve only axial resolution.
False. It improves both L.R and A.R
500
The ability to create accurate images
What is Resolution
500
What are the synonyms for Axial Resolution?
Longitudinal, Axial,Range, Radial, Depth
500
What are the synonyms for lateral resolution
Lateral, Angular, Transverse ans azimuthal
500
What are the three methods of Focusing
External, internal, phased array
500
What type of resolution is better for clinical imaging
axial resolution
M
e
n
u