General Physics Range Equation - 13 Microsecond rule Sound travels in soft tissue at a speed 1.54 millimeters per microsecond (us) of Go - Return time The time to the reflector is half of go-return time The go-return time is also called the time of flight Therefore sound travels to the reflector at 0.77mm per microsecond (us) The depth of the reflector may be calculated as (1.54 mm per us X GRT)/2 in units of millimeters PRP= Imaging depth X 13µs per cm PRF = 77,000cm per second/imaging depth (cm) EXERCISE The table below refers to sound wave propagating soft tissue Find the time to the reflector, total distance travelled and distance to the reflector PRP and PRF Depth of reflector - Imaging depth (mm) (1.54 X GRT)/2 Time of flight- GRT(us) 1 2 3 4 5 6 7 8 9 10 11 12 13 Time to the reflector(us) GRT/2 Total distance travelled (mm) 1.54 X GRT PRP imaging depth (mm) X 13 μs/cm PRF 1/PRP or 77,000cm per second/imaging depth (cm)
General Physics Range Equation - 13 Microsecond rule Sound travels in soft tissue at a speed 1.54 millimeters per microsecond (us) of Go - Return time The time to the reflector is half of go-return time The go-return time is also called the time of flight Therefore sound travels to the reflector at 0.77mm per microsecond (us) The depth of the reflector may be calculated as (1.54 mm per us X GRT)/2 in units of millimeters PRP= Imaging depth X 13µs per cm PRF = 77,000cm per second/imaging depth (cm) EXERCISE The table below refers to sound wave propagating soft tissue Find the time to the reflector, total distance travelled and distance to the reflector PRP and PRF Depth of reflector - Imaging depth (mm) (1.54 X GRT)/2 Time of flight- GRT(us) 1 2 3 4 5 6 7 8 9 10 11 12 13 Time to the reflector(us) GRT/2 Total distance travelled (mm) 1.54 X GRT PRP imaging depth (mm) X 13 μs/cm PRF 1/PRP or 77,000cm per second/imaging depth (cm)
College Physics
1st Edition
ISBN:9781938168000
Author:Paul Peter Urone, Roger Hinrichs
Publisher:Paul Peter Urone, Roger Hinrichs
Chapter3: Two-dimensional Kinematics
Section: Chapter Questions
Problem 64PE: (a) Use the distance and velocity data in Figure 3.64 to find the rate of expansion as a function of...
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