Formulas Flashcards
1
Q
Period x Frequency
A
= 1
2
Q
Intensity=
A
power/area
3
Q
wavelength=
A
prop speed/frequency
4
Q
pulse duration=
A
of cycles x period
AND
of cycles / frequency
5
Q
SPL=
A
of cycles x wavelength
6
Q
PRP=
A
1/PRF
7
Q
PRF=
A
1/PRP
8
Q
Duty Factor=
A
Pulse Duration/PRP x 100
9
Q
Attenuation (dB)=
A
Attenuation Coefficient x distance
10
Q
Attenuation coefficient (dB/cm)=
A
Frequency (MHz)/2
AND
0.5dB/cm/MHz
11
Q
PRP=
A
imaging depth (cm) x 13 microseconds/cm
12
Q
PRF(Hz)=
A
77,000cm/s/imaging depth (cm)
13
Q
Axial resolution (mm) =
A
SPL(mm)/2
AND
wavelength x # of cycles in pulse / 2
AND
0.77 x # of cycles in pulse / frequency
14
Q
NZL (mm)=
A
Diameter^2 / (4 x wavelength)
