Physical Principles Flashcards
1
Q
Doppler Equation
A
dF= 2 Fo V Cos
_________
c
2
Q
dF
A
doppler shift
3
Q
Fo
A
carrier freq
4
Q
V
A
velocity
5
Q
Cos
A
angle
6
Q
c
A
speed of us through soft tissue 1540 m/s
7
Q
directly related to transducer
A
doppler shift
8
Q
What does the number 2 represent
A
two doppler shifts: red blood cells then act as a wave source
9
Q
frequency is
A
collected
10
Q
velocity is
A
calculated
11
Q
calculating for velocity
A
V = c Df
_____
2 Fo Cos
12
Q
velocity eq
v =
A
calculated value which represents velocity of flow (moving reflector) to calc, the freq must be known
13
Q
vel eq
Df=
A
known value, measured by doppler proportional to velocity of source
14
Q
vel eq
Cos=
A
angle determined form image
15
Q
cos of 90 =
A
0
