The study of sound traces back to the _______ __________.
1500’s, __________ __ _____ was intrigued with the physical properties of sound. He discovered that sound travels in waves. Also credited with the discovery that the angle of reflection is equal to the angle of incidence
Leonardo da Vinci
Mid 1630’s _________ discovered that the frequency of sound determines pitch.
Late 1600’s – ___ _____ ______ discovers the theory of velocity and a chemist ______ ______ popularized the theory of the elasticity of air.
Sir Isaac Newton; Robert Boyle
Experiments performed and mathematical calculations were developed that lead to the current understanding of the fundamentals of _________
Acoustics is the
study of science, engineering, and the art of generating, propagating, and receiving sound waves.
1793 _______ ________ studied the activities of bats. He discovered that bats could navigate while blinded but not if deafened.
The field of ultrasound was made accessible in the 1880s by ________ and ________ ______ with the discovery of the piezoelectric effect.
Jacques and Pierre Curie
What discovery lead to the development of transducers?
In the ___ century, scientists learned how to produce ultrasound and put it to work
In 1942, Austrian, _______ _____ was one of the first physicians to use ultrasound for diagnostic purposes
In 1947, ______ ____ successful detected gallstones.
In 1950 at the University of Washington, “flow meters” were developed also known as continuous wave ________.
In the 1950’s and 1960’s _______ ______ were developed for use in cardiology and obstetrics
Mid 1960’s _______ ______ _____ were initially used for obstetrics to locate placenta, for fetal position and fetal age
Contact static scanner
In early 1960s in Philadelphia, Dr. __ ______ ______ designed real-time obstetric ultrasound system.
Dr. J Stauffer Lehman
What technology helped to show the different amplitudes of soft tissue?
When did serious Doppler research start?
What year did the University of Washington group also designed the first pulsed-wave Doppler scanner capable of combining 2-D gray-scale imaging?
______-______ ________ were produced by automated scanners with sufficient speed to visualize and record moving structures. Also known as B-Scanner.