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 Total distance travelled (mm) 1.54 X GRT Depth of reflector - Imaging depth (mm) (1.54 X GRT)/2 Time of flight - GRT(μs) 1 2 3 4 5 6 7 8 9 10 11 12 13 Time to the reflector(us) GRT/2 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 Total distance travelled (mm) 1.54 X GRT Depth of reflector - Imaging depth (mm) (1.54 X GRT)/2 Time of flight - GRT(μs) 1 2 3 4 5 6 7 8 9 10 11 12 13 Time to the reflector(us) GRT/2 PRP imaging depth (mm) X 13 μs/cm PRF 1/PRP or 77,000cm per second/imaging depth (cm)
College Physics
11th Edition
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Raymond A. Serway, Chris Vuille
Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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