Studied by 8 people
The diagnostic ultrasound imaging (sonography) method has 2 parts:
Sending ___ of into the body, and 2.) using ____ received from the anatomy to produce an of that anatomy__
pulses, ultrasound, echoes, image
Ultrasound gray-scale scans are ________ images of tissue cross-sections and volumes
pulse echoes
the brightness of an echo as presented on the display, represents the ______ of the echo
strength
A linear scan is composed of many _________ scan lines
vertical, parallel
A sector scan is composed of many scan lines with a common ______
orgin
A linear scan has a _______ shape
rectangular
the shape of a sector scan is similar to a ___ of _____
slice, pie
A sector scan can have a ___ or a ____
pointed, curved
This is an example of an image in which the scan lines do not orginate at a common ______
orgin
Sonography is accomplished by using a pulse-echo technique. the important info gained from this technique includes the ___ from which each echo orginated and the ___ of each echo. from this info, the instrument can determine the echo and _______ on the display__
location, strength, location, brightness
the ________ is the interface between the patient and the instrument
transducer
transducers generate ultrasound ____ and receive returning _____
pulses, echoes
echo info in 3D is presented on ______ displays
2D
Acquisition of a 3D echo data volume requires scanning the ultrasound through several tissue _______
cross-sections
the doppler effect is a change in echo______
frequency
the change in echo frequency is due to _____
motion
the motion that produces the Doppler effect is that of the _______
reflector
in medical applications the flow of ____ is comonly the source of the doppler effect. doppler info is applied to for audiable evaluation and to _________ for visual analysis.__
blood, loudspeakers, displays
the visual display of doppler info can be in the form of a ____-Doppler display or a ______- doppler display
spectral, color
Color-Doppler displays can present Doppler-___ and Dopppler-_____ info in color
shift, power
This shows a
2D linear image
This shows a
3D gray-scale image
This shows a
spectral display
This shows a
modified sector image
This shows a
2D Sector image
One line of echo information is called the
scan line
The brightness of the displayed echo corresponds to its
strength
1 inch = ____cm
2.54 cm
1cm= ____mm
10
79mm=____cm
7.9cm
04.mm=____cm
0.04cm
Express 10 in exponential notation
10^1
Express 1,000,000 in exponential notation
10^6
Express 1/100 in decimal form
0.01
Express 1/100 in exponential notation
10^-2
Express 1/1,000,000 in decimal form
0.000001
What prefix describes 1/1,000,000
micro
Express 1/1,000,000 in exponential form
10^-6
What is the logarithm of 10
1
What is the logarithm of 0.01
-2
Every measurement has 2 parts:
unit, magnitude
10^9
giga (G)
10^6
mega (M)
10^3
kilo (k)
10^2
hecto (h)
10^1
deca (da)
10^-1
deci (d)
10^-2
centi (c)
10^-3
milli (m)
10^-6
micro (u)
10^-9
nano (n)
billions and billonths
giga and nanomi
millions and millionths
mega and micro
thousands and thousandths
kilo and milli
hundreds and hundredths
hecto and centi
tens and tenths
deca and deci
log10000
4
log1000
3
log100
2
log10
1
log0.1
-1
log0.01
-2
log0.001
-3
log0.0001
-4
Binary numbers are between ____
0-1
motion of an object can be described by 2 terms:
velocity and acceleration
Equation for force
F=(m)(acceleration)
accleration
the rate of change in velocity per unit of time, how fast the velocity is changing
if velocity is constant then acceleration is
0
velocity
the rate of change of the position of an object with time
d/t
Force
push or pull of an objectwo
work
the force applied times the distance over which it is applied
W=F (d)
Power (P)
the rate of doing work
energy
the ability to do work
Note 
Flashcard (64)