1        

      Frequency_(Hz)

     1      

Period_(s)

     C_(mm/us)

F_(Hz)

SPL_(mm)

2

     .77 x #cycles  

F_(MHz)

   C in PZT _(mm/us)   

2 x thickness_(mm)

Focal Depth_(mm)  =

(Focal Length & Near Zone Length)

Diameter²_(mm) x F_(MHz)

6

Focal Depth_(mm)  =

(Focal Length & Near Zone Length)

  diameter²_(mm)   

4 x  λ_(mm)

Sin Divergence Angle  =

(Beam Divergence)

             1.85              

diameter_(mm)  x  F_(MHz)

Sin Divergence Angle  =

(Beam Divergence)

  1.2  x  λ_(mm)  

diameter_(mm)

     F_(Hz)

2

  C_(mm/us)  x  Go-Return time_(us)

2

      77,000_cm/s    

Depth_(cm)

PRP_(us) 

PRF_(MHz)

Power_(W)

Area²_(cm)

      1     

       PRF_(MHz)

   1  

     PRP_(us)

Time Per Frame_(s)  =

(T_frame)

         1        

  Frame Time_(s)

(T_frame)

Doppler Shift_(Hz)  =

(Doppler Δ)

Reflected F_(Hz)  -  Transmitted F_(Hz)

(Fe-Fo)

Doppler Shift_(Hz)  =

(Doppler Δ)

2  x  Velocity (of blood)  x  Fo  x  cosθ

C

   PRF_(Hz)

2

# cycles

     F_(MHz)

       PD_(us)    

   PRP_(us)

x  100

       (Z₂ - Z₁)²

       (Z₂ + Z₁)²  

x  100

               Transmitted Intensity_(W/cm²)    

     Incident Intensity_(W/cm²)

x  100

sin (Trans Angle)  =  Speed of Medium 2

sin (Incid Angle)   =  Speed of Medium 1

Stiffness

(Bulk Modulus)

    Main F   

Bandwidth

Peak Rarefaction_(Negative) Pressure

√F

Velocity_MAX  -  Velocity_MIN

Velocity_MAX

Velocity_MAX  -  Velocity_MIN

Velocity_MEAN

Velocity of blood  =

(In Doppler)

C  x  Doppler Δ

2  x Fo  x θ