What is the formula for Doppler shift? The relationship
Doppler shift= 2 x transducer frequency x Vel x cos0 / C
what is the formula
Doppler shift that means action
Doppler Shift (Hz) = Reflected Frequency – Transmitted Frequency
Velocity formula for Doppler shift
Velocity= C x Doppler shift / 2 x frequency transducer x coso
What is the formula for Pressure Gradient?
Pressure Gradient= Flow X Resistance
What is the formula for Measured velocity?
Measured velocity = True velocity x Cos θ
What is the formula for Nyquist Limit?
Nyquist Limit = PRF
/2
What is the foumula for Bernouli’s Principle
Bernouli’s Principle = 4(V2)
Formula for Wavelength that defines relationship between frequency and soft tissue
Wavelength (mm) = 1.54mm/us / frequency (MHz)
formula for Q-factor
Q-factor= resonant frequency /
Bandwidth
formula for Impedance
Impedance (Rayls) = Density (kg/cm^3) x propagation speed (m/s)
Formula for wavelength
Wavelength (mm) = 1.54 mm/us / frequency
Formula for Total Attenuation
Total Attenuation (dB) = Attenuation Coefficient (dB/cm) X distance (cm)
Formula for angle incidents
Angle of incidence = Angle of reflection
What’s the formula for Q factor
Q-factor = resonant frequency / bandwidth 
What’s the formula for speed?
Speed (ms) = frequency (Hz) X wavelength (mm)
Formula that represents Focal depth?
Diameter (mm)^2 X Frequency (MHz) / 6
Formula for Total Attenuation
Total attenuation (dB) = Attenuation coefficient (dB/cm) x Distance
(cm)
Formula for Attenuation Coefficient:
Attenuation Coefficient (dB/cm) = Frequency (MHz) / 2
Formula for speed
Speed = Distance / Time
Frame Rate
Frame Rate= PRF / Lines per frame
Duty Factor
Duty Factor = Pulse Duration / PRP
PRP
PRP= imaging depth (cm) x 13 (us/cm
PRF
PRF (Hz)= 77,000 / imaging depth
Axial Resolution both formulas
- Axial = SPL / 2
- Axial Res (mm)= wavelength (mm) x # of cycles in pulse / Frequency
