Principles Of Physics In Ultrasound Essay

2554 words - 10 pages

Principles of Physics in Ultrasound

Physics has become an important part of medicine allowing specialist
doctors and radiographers to rapidly access a patient’s condition and
to help in long-term diagnosis.

This enables doctor’s to treat patients before their condition

This procedure would not be possible without the use of X-rays, CAT
scans, MRI scans, ultrasound and endoscopes, which allow doctors to
see inside the body with little or no surgery.

Without such equipment doctors would be forced to use invasive
techniques, which could cause patients more harm as it increases the
risk of infection.

A sound or ultrasound wave consists of a mechanical disturbance of a
medium (gas, liquid or solid) which passes through the medium at a
fixed speed.

Sound waves consist of a disturbance of air molecules, the vibrations
which pass from molecule to molecules from the speaker to the ear of
the listener.

The rate at which particles in the medium vibrate in the disturbance
is the frequency or pitch of the sound measured in hertz

As the pitch increases there comes a frequency at about 20kHz when the
sound is no longer audible and above the frequency disturbance, this
is know as ultrasound.

The first major breakthrough in the evolution of high frequency
echo-sounding techniques came when the piezo-electric effect in
certain crystals was discovered by Pierre and Jacques Curie in Paris
in 1880.

The turn of the century saw the invention of the Diode (component that
restricts the direction of movement, allows an electric current to
flow in one direction) and the Triode (type of vacuum tube), allowing
powerful electronic amplification necessary for developments in
ultrasonic instruments.

The early work in the 20th century used ultrasound as a therapy tool
and it was not until the 1940’s that research began into its use as a
diagnostic tool.

The use of ultrasound in medicine began during and shortly after the
2nd World War in various centres around the world. (NSC, UK national
screening committee)

The work of Dr.Karl Theodore Dussik in Austria in 1942 on transmission
ultrasound investigation of the brain provided the first published
work on medical ultrasonic’s.

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 1950s, did much to facilitate the development
of practical technology and applications.

This lead to the wider use of ultrasound in medical practice in the
subsequent decades.

Rapid technological advances in electronics and piezoelectric
materials provided further improvements from energy to greyscale
images, and from still images to real-time moving images. The
technical advances at this...

Find Another Essay On Principles of Physics in Ultrasound

The Role of Edward Teller in the Development of Physics

1531 words - 6 pages the effect of what brought about the Hiroshima bombing has been more popular to many. It is my intention that in this paper, I will present his role in furthering the development of Physics (Goodchild, 2004).Teller belongs to the group of one the most brilliant physicists in the world. He was born in the year 1908 at Budapest, Hungary. He is a trained chemical engineer who attended the University of Leipzig in Germany where he received his Ph.D in

Principles of Leadership Communication in Pearce's Leading Out Loud

550 words - 2 pages must prove themselves to be competent and trustworthy. In authentic leadership communication the author states that 4 principles must be employed- discovering what matters, applying courage, discipline, and decide to lead. The most valuable commodity of any great organization is the quality of good people. Almost everyone has good intentions but leaders acknowledge what needs to be done and has the ability to inspire others to respond

Principles of Republican Constitutionalism: What were the main principles of 19th century constitutionalism and how were these principles expressed in public policy?

984 words - 4 pages 19th century Republican constitutionalism was based on several important principles, which were clearly expressed in public policy. Republicans believed heavily in the legislative independence based on the separation of powers, and a strict construction of congressional power and states' rights. They were also concerned with the relationship between citizens and government, the distribution of power among the different branches of government

Just in Time. 4 page overview of the principles of just-in-time production operations management

1604 words - 6 pages JIT (just-in-time)Many organizations throughout the world use JIT management principles in their everyday operations. It was first developed in Japan in the late 1950s by a former shop manager and later on vice president of Toyota. In its simplest form, JIT program is directed towards ensuring that the right quantities are produced or purchased at the right time, and that there is no waste. Waste is defined as anything that doesn't add value to

Principles of Community Development in Relation to Sustainable, Community Based Natural Resource Management

2539 words - 10 pages Introduction Community development pulls together the idea of community and development. Many communities have failed to attain development due to lack of knowledge in the principles that need to be applied when pursuing developmental goals. The knowledge and application of the principles that define community development is fundamental for every development-oriented individual and practitioner since it puts the interested parties in the right

DeTocqueville's Benefits of Democracy Compared With the Principles Found in Walden

1703 words - 7 pages of democracy and compare them with the principles found in Walden. Of the first benefit, public spirit, DeTocqueville describes two types of patriotism. The first is based on a pride of family and country and “a reverence for traditions of the past,” resulting in a strong felt personal connection to the government (pg. 102, DeTocqueville). This type is commonly found within monarchal governments. The second is a loyalty to country based on

A detailed study of William Blake's 'Songs of Innocence and Experience' in relation to the principles of the pastoral convention.

1642 words - 7 pages Literature CourseworkKara-kaye D'Aguilar HoilettQuestions:(a)What does the Pastoral Convention refer to?(b)By detailed reference to Blake's poems, show how they highlight features of the pastoral.(c)What is the underlying significance of Blake's usage of the Pastoral? (What message is he conveying by using it?In the poetic anthology, Songs of Innocence and Experience by ardent romanticist William Blake, the reader is exposed to a kinship of

This essay is about the political framework of Islam. It talks about the basic principles and happenings in Islam's government.

572 words - 2 pages constitute the law of Islam. Risala is the medium through which we receive the law of Allah. The Qur'an laid down the broad principles on which human life should be based and the Prophet of Allah, in accordance with these principles, established a model system of Islamic life. Man, according to Islam, is the representative of Allah on earth, His vice-gerent; that is to say, by virtue of the powers delegated to him by Allah, and within the limits

The principles of conflict management: The reasons why conflict occur in the workplace and tips on how to resolve them.

1472 words - 6 pages The principles of conflict management:Dr. Kenneth W. Thomas defines conflict as the process, which begins when we perceive that someone has negatively affected, or is about to negatively affect, something we care about. The more deeply we care about something the more intense the conflict.If you have to deal with people, sooner or later, you will have to deal with conflict. Conflict is not inherently bad. Conflicts simply stems from differing

Discusses these principles of natural order as first established in ancient Chinese philosophy, and how the style of poetry conforms to the basic ideals of the Daoists.

1142 words - 5 pages natural path, rather than the predetermed values of a group. This was the "Real Life" that provided real freedom and personal fulfillment in the Daoist world. It is important to remember that nature isn't just a tree, a river, an animal or ocean. Nature is all of us and all things. Nature flows around and through us if we allow it.After the emergence of Daoism in China as a religious expression, Daoist principles started to take root in society

The extent to the economic characteristics of ''Local ferry services in Hong Kong's outlying island'' and correspond to the principles of market structures as put forward by economists.

4854 words - 19 pages licensed passengers ferry services to outlying islands and the Victoria Harbor. In addition, ''Star ferry'' is a franchisees granted by the Executive Council and which mainly focus on the routes across the Victoria Harbor. In the following sectors, there are further discuss the market characteristics on the ''Local ferry services in Hong Kong's outlying island '' and correspond to the principles of market structures.Market structure

Similar Essays

The Physics Of Ultrasound Essay

873 words - 3 pages Without the use of physics in the medical field today, diagnosis of problems would be challenging, to say the least. The world of medical imaging in particular has benefited greatly from the use of physics. Ultrasound is sound waves that have a frequency above human audible. (Ultrasound Physics and Instrument 111). With a shorter wavelength than audible sound, these waves can be directed into a narrow beam that is used in imaging soft

Role Of Physics In Sports Essay

1319 words - 5 pages The motions of throwing, batting, and fielding will be presented in physics terms and ideas. Physics plays a big role in sports. One particular sport is softball, where we will be seeing different motions represented. First, we are going to look at the two different types of throwing. There is the regular over-hand throw and there is also the pitching style. When looking at the regular over-hand throw and the pitching style of throwing, many of

The Importance Of Principles In The Crucible

1216 words - 5 pages confession against more of the accused, reasoning that they were finding and persecuting real witches. John Proctor, the protagonist in Arthur Miller’s The Crucible, refused to lie and confess to witchcraft, a crime he did not commit. Because of his reasoning he hanged for what he believed for. Proctor felt that his two main principles were more important to respect and uphold than life itself. These two beliefs were to keep his reputation clean

Personal Principles In The Face Of War

895 words - 4 pages Personal morals are a powerful thing. However, when it comes to war, they take a back seat to duty. There are several examples, fiction and non-fiction, of how personal morals do not exist in times of active war. Morals will sit in the back of the mind and fester there until duty has been accomplished. Once the duty has been completed individuals that abandoned their moral compass will think of the wrongs they did in the name of duty. Although