ch 7 Range Equation

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go return time
or time of flight

time from pulse creation to pulse reception
time of flight and depth are

directly related
depth of reflector formula

depth (mm) = 1.54mm/us x go return time (us) / 2
13 microsecond rule

for every 13 us of go-return time the object is 1 cm deeper in soft tissue

eg. 2cm = 26us
prp in soft tissue

PRP (us) = imaging depth (cm) x 13us
prp and image depth relationship

directly related
prf in soft tissue

PRF (Hz)= 77,000cm/s / imagine depth (cm)
prf and imaging depth relationship

inversely related
range equation determines

depth of reflector
range

depth
range equation in soft tissue

depth= .77 mm/us x go return time