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Real breathrough of high frequency echo sounding techniques came when the Piezo-Electric Effect in certain crystals was discovered by Peirre Curie and his brother Jacques Curie. (Paris, France).
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The use of Ultrasound in the field of medicine started initially for therapuetic application, rather than diagnostic. Its heating and disruptive effects on animal tissues. www.ob-ultrasound.net/history.html
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Ultrasound was experimentally used as a possible diagnostic tool in medicine. www.ob-ultrasound.net/history.html
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Wild and Reid invented and described the use of A mode transvaginal and transrectal scanning transducers in 1955 http://www.ob-ultrasound.net/history1.html
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Idea that sonar could be used for Medical Diagnosis was first put into practice. http://www.ob-ultrasound.net/history1.html
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Tom Brown and Ian Don Donald constructed a prototype of the worlds first Compound B mode contact scanner in 1957. The prototype progressively improved and became the Diasonograph(1963).
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Application of Ultrasound in OB/GYN diagnosis started in 1956 with A scan basing on a vaginal approach and later B scans at around 1962 basing on the use of the on point contact sector scanner.
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Ian Donald, invented the first measurement of the biparietal diameter. (BPD) http://www.ob-ultrasound.net/history1.html
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Estimation of in utero fetal weight based on the BPD and Thoracic circumference ws first reported in 1965 by Thompson Group in Denver, Colorado.
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As early as 1972, Kratochwil successfully demonstrated visualization of ovarian follicles with static B-MODE ultrasound. http://www.ob-ultrasound.net/history1.html
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Scottish group, expounded the concept of 'blighted ovum' in OB, First described by Ian Donald in 1967. http://www.ob-ultrasound.net/history1.html
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Real time scanner soon enabled the accurate measurement of fetal limb bones that lead to the introduction of the important measurement of the fetal femur length by John Hobbins. http://www.ob-ultrasound.net/history1.html
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Kazunori Baba from Tokyo, Japan, first reported a 3-D ultrasound system in 1984 and succeeded in obtaining 3-D fetal images by processing the raw 2-D images on a mini-computer in 1986.
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Kenneth Taylor described blood flow in the ovarian and uterine arteries in 1985... Asim Kurjack in Croatia pioneered the use of transvaginal color doppler in the assessment of the pelvic circulation 1989.
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http://www.youtube.com/watch?v=NNHk3GJwN7o 4D Ultrasound scanner was first introduced in late 2001 by GE Medical systems.
