Ecógrafos

By grouproyect

  • Jacques and Pierre Curie

    Jacques and Pierre Curie published the results obtained by experimenting the application of an alternating electric field on quartz and tourmaline crystals, which produced sound waves of very high frequencies.
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    Ecógrafos

    Historia de los ecógrafos
  • Period: to

    Ecógrafos

  • Galton

    The so-called Galton whistle appeared, used to control dogs by sound inaudible to humans.

  • Use of the ultrasonic echoes

    Shortly after the sinking of the Titanic, L. F. Richardson, suggested the use of ultrasonic echoes to detect submerged objects

  • World war

    Between 1914 and 1918 during the First World War, we worked intensely on this idea, trying to detect enemy submarines.

  • The first piezoelectric

    Paul Langevin and Chilowsky produced the first piezoelectric ultrasonic generator, whose crystal also served as a receiver, and generated electrical changes by receiving mechanical vibrations. The device was used to study the seabed, as an ultrasonic probe to measure depth.

  • Sergei Sokolov

    In 1929, Sergei Sokolov, Russian scientist, proposed the use of ultrasound to detect cracks in metal, and also for microscopy.

  • World war II

    Between 1939 and 1945, during World War II, the initial system developed by Langevin, became the standard equipment to detect submarines, known as ASDIC (Allied Detection Investigation Committes). In addition, ultrasonic probes were placed on the torpedoes, which guided them to their targets. Later, the system would become SONAR (Sound Navigation and Ranging), whose highly improved technique is the norm in navigation.

  • Firestone

    Firestone developed a refrectoscope that produced short pulses of energy that was detected by being reflected in cracks and fractures.

  • Karl Dussik

    Karl Dussik, a psychiatrist working in Austria, tried to detect brain tumors by recording the passage of the sonic beam through the skull. He tried to identify the ventricles by measuring the attenuation of the ultrasound through the skull, which he called "Hyperhonography of the brain".

  • Soft tissue structures

    Dr Douglas Howry, detected soft tissue structures by examining the reflexes produced by ultrasound at different interfaces.

  • A echo tecnique

    In 1949 a pulsed echo technique was published to detect intracorporeal foreign body and calculus.

  • Compound Ultrasound

    The Compound Ultrasound appeared, in which a mobile transducer produced several ultrasonic beam shots from different positions, and towards a fixed area. The echoes emitted were recorded and integrated into a single image. Water immersion techniques were used with all kinds of containers: a laundry tub, a cattle trough and a machine gun turret of a B-29 aircraft.

  • Dimensional images

    Howry and Bliss published two-dimensional images of the forearm, live.

  • Leksell

    Leksell, using a Siemens reflectoscope, detected the displacement of the echo of the midline of the skull in a 16-month-old child. The surgery confirmed that this displacement was caused by a tumor.

  • Donald

    In 1954Ian Donald did research with a crack detector, in gynecological applications.