Triangle Relationships Flashcards
1
Q
Attenuation coefficient=
A
Frequency/2
2
Q
Total Attenuation=
A
Attenuation coefficient *path length (distance)
3
Q
Axial resolution=
A
SPL/2
(Wavelength*# of cycles)/2
(.77mm per us*# of cycles)/frequency
4
Q
DF=
A
PD/(PRP*100)
5
Q
Direct relationships
A
A.Duty factor and Pulse duration B. Duty factor and PRF C. Frequency and attenuation D. attenuation and depth E. Density,impedance, propagation speed F. propagation speed and wavelength G. Beam power and intensity
6
Q
Impedance=
A
Density*Prop speed
7
Q
Intensity=
A
Power/cm^2
8
Q
Near zone length=
A
(Diameter of the beam^2)/(4* wavelength)
9
Q
1=
A
Period * frequency
10
Q
Propagation speed=
A
Frequency * wavelength
11
Q
PD=
A
cycles/ frequency
12
Q
PRF=
A
1/PRP
Or
77,000 cm per sec/imaging depth cm
13
Q
PRF=
A
77,000 cm per sec/ imaging depth
14
Q
PRP=
A
1/PRF
Or
Imaging depth (cm)* 13 us per cm
15
Q
PRP=
A
Imaging depth (cm)* 13 us per cm
16
Q
Reciprocal relationships
A
A. Period and Frequency B. PRP and PRF C. Wavelength and Frequency D. Frequency and depth E. Beam area and intensity
17
Q
SPL=
A
cycles* wavelength
18
Q
Wavelength=
A
Propagation speed / frequency
19
Q
Range Equation
A
X
