And it provided accurate and useful results. However, the high-power ultrasound is capable of damaging the tissues of a human. So, make sure that you are doing ultrasound treatment for clinically acceptable reasons. Now, this is one of the exciting aspects. Well, most of the time, pregnant women delivered positive reception about the ultrasounds.
The main reason is that it reveals the health of the baby. So, pregnant women are always excited about their ultrasound scans. In case, if the baby moves, the mothers become happy and excited. Also, witnessing the fetus also comes with a humanizing effect. It holds the moral significance for the women who were thinking of doing an abortion.
Sometimes, it plays a significant role in decision making. The technology used in medical ultrasound is continuously evolving and currently contributing to important improvments in patient diagnosis and treatment.
The science and technologies employed in sonography have a long and interesting history. Many ask, who invented the ultrasound? Italian biologist, Lazzaro Spallanzani is most often credited person for discovering ultrasonography. Lazzaro Spallanzani was a physiologist, professor and priest who carried out numerous experiments that led to great insights in human and animal biology. In Spallanzani performed studies on bats that concluded that they could navigate using sound rather than sight.
This is now known as echolocation where locations are determined or identified through sound waves being reflected or bounced back from objects in an environment. These same principles are how medical ultrasound technology functions today. Ultrasound is characterized as sound waves with a frequency higher than what is audible to the human ear. Kane, W. Grassi, R. Sturrock, P. We can find several additional examples of echolocation in nature.
Echolocation pulses are short bursts of sound at frequencies that span from about 1, hertz in birds to at more than , hertz in whales. Gerald Neuweiler, in his book The Biology of Bats , describes how Spallanzani brought owls into his lab and observed that they would not fly around the room if there was no source of light.
Spallanzani knew this because bells were attached to the ends of the wires. Although he did not know that the bats were emitting their own sound for orientation, sound higher than he or any human would be able to hear, Spallanzani was able to conclude that the creatures were using their ears to navigate their environment.
Concerns about its safety have periodically surfaced, but Nicolson said he thinks these stem more from anxiety over the role of technology in pregnancy than from evidence of harm. No pattern of damage has been found," Nicolson said. However, at high power, ultrasound waves are able to damage human tissue. Researchers don't know exactly at what level this occurs, Nicolson said, adding that testing the threshold at which it becomes dangerous in humans would be unethical.
He said that ultrasound scans should only be done for clinically justified reasons. For example, so-called "bonding scans," images taken purely for commemorative purposes, unnecessarily expose a fetus to the high-energy sound waves, Nicolson said. Ultrasound has enjoyed an enthusiastic reception by pregnant women.
In addition to revealing the baby's health, the images themselves provide a keepsake. In fact, Nicolson said, some women report not feeling pregnant until they've seen the ultrasound image. Although other workers in the USA, Japan and Europe have also been cited as pioneers, the work of Professor Ian Donald and his colleagues in Glasgow, in the mid s, did much to facilitate the development of practical technology and applications.
This led to the wider use of ultrasound in medical practice in the subsequent decades. From the mid sixties onwards , the advent of commercially available systems allowed the wider dissemination of the art. Rapid technological advances in electronics and piezoelectric materials provided further improvements from bistable to greyscale images and from still images to real-time moving images.
The technical advances at this time led to a rapid growth in the applications to which ultrasound could be put. The development of Doppler ultrasound had been progressing alongside the imaging technology but the fusing of the two technologies in Duplex scanning and the subsequent development of colour Doppler imaging provided even more scope for investigating the circulation and blood supply to organs, tumours etc.
The advent of the microchip in the seventies and subsequent exponential increases in processing power have allowed faster and more powerful systems incorporating digital beamforming, more enhancement of the signal and new ways of interpreting and displaying data , such as power Doppler and 3d imaging.
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