Year 9 Physics Study Guide

A shadow picture is constructed from different echoes being reflected from a variety of tissues (Radiological Society of North America). Ultrasounds can come in many forms. Traditional images are displayed in thin, flat sections of the body. However, advancement in technology now includes 3-D and 4-D ultrasounds as well as many other specific types (Radiological Society of North America).

Another form of imaging is ultrasound. Ultrasound, which uses very high frequency sound, is directed into the body. And because the tissue interference's reflect sound, doctors are able to produce, by use of a computer, a photograph or moving image on a television. Ultrasound has many application uses on the body, but is more commonly used in examinations of the fetus during pregnancy, because use of radiation may affect the outcome of the baby. Some other practices for ultrasound include examination of the arteries, heart, pancreas, urinary system, ovaries, brain, and spinal cord. And because sound travels well through fluids it is a very useful technique for diagnosing cysts( which are filled with fluid), and fluid filled structures such as the bladder. And since sound is absorbed by air and bone it is impossible to use a ultrasound on bones or lungs.

Sonography is non-invasive. A sonographer uses equipment that directs high-frequency sound waves to body organs and tissue to generate medical diagnostic images. It does not use radiation and is expected to grow in a professional manor and as a tool used by physicians. This is also a way for many individuals to use non-invasive technology to help assist in diagnostics.

The purpose of this experiment is to measure the speed of sound in air and to determine the effects of frequency on the speed of sound.

Diagnostic medical sonography is a profession where sonographers direct high-frequency sound waves into a patient’s body through use of specific equipment to diagnose or monitor a patient’s medical condition. As described by the Bureau of Labor Statistics, this examination is referred to as an ultrasound, sonogram, or echocardiogram. The high-frequency sound waves emitted from the handheld device, called a transducer, bounce back creating an echo and therefore produce an image that can be viewed on the sonographers computer screen. This image provides the sonographer and physician with an internal image of the patient’s body that will be used in diagnosis. The most familiar use of ultrasound is used in monitoring pregnancies, and is

Diagnostic medical sonographers play a key role in the health care team and often work alongside doctors, nurses, and other technologists. They prepare patients by explaining the procedure and collect necessary patient history information prior to examination. An ultrasound is then performed, which is a non-invasive process that enables sonographers to send high-frequency sound waves into the body. The return signals are then analyzed to help visualize internal organs in 2D, 3D or 4D. These images help physicians with medical diagnoses and are also used for monitoring pregnancy. An ultrasound is often executed on many different areas of the body including the abdomen, pelvis, tissues, and vascular and cardiac systems. A DMS may also be required

“Suppose that a slinky is stretched out in a horizontal direction across the classroom and that a pulse is introduced into the slinky on the left end by vibrating the first coil left and right. Energy will begin to be transported through the slinky from left to right. As the energy is transported from left to right, the individual coils of the medium will be displaced leftwards and rightwards. In this case, the particles of the medium move parallel to the direction that the pulse moves. This type of wave is a longitudinal wave. Longitudinal waves are always characterized by particle motion being parallel to wave motion.”

Sound is a very interesting topic that many people do not fully understand. There are lots of questions on why or why not we can hear certain things and how do we process different sounds and vibrations. The first thing that is important to know before getting into all the details is that sound is release of energy and the energy is released in the form of vibrations. Then , the vibrations will emit from whatever has made the sound in what is known as a longitudinal wave. A longitudinal wave is a wave that travels in a sing direction.

Third, I will be telling you how the process of medical imaging works. Sound waves will travel through your body until hitting an object or boundary such as muscles, bones, or fat. What you are seeing in an ultrasound is the reflection of the sound waves hitting the object and being transmitted back to the screen. This will show you where everything is located and if it is where it supposed to be.

The 1960s introduced the use Ultrasound to the medical field. Since the introduction of Ultrasound there has been many technological advancements that have greatly improved ultrasound imaging and quality of diagnosis results. These

Ultrasound or other vibrations having an ultrasonic frequency, particularly as used in medical imaging. Ultrasound is a mechanical vibration of matter above the audible range. The wave is propagating through the medium as a

Ultrasonography requires the use of some physics. Physics of Ultrasonography connects with how the functioning of the ultrasound machine works. When performing an ultrasound, “low intensity, high frequency sonic waves are directed into the soft tissues of the body” (Blevins et al. 1). Many sonic waves will directed right into the soft tissue to produce an image on the computer screen. William E. Blevins says, “The sonic waves called echoes, reflecting from tissues are ‘heard’ by the transducer” (Blevins et al. 1). This means the sounds of the tissue reflects back to the transducer and then back to the computer for evaluation. Then, “After interacting with the soft tissues, a portion of the sound is reflected back toward the source of the sound” (Blevins et al. 1). Basically the ultrasound evaluates the sound waves coming from inside of the body of the soft tissue. The sound waves travel back to the computer to produce an image on the screen. Finally, “These reflections or echoes are analyzed by a computer and a black and white image is produced” (Blevins et al. 1). When the black and white image appears back on the screen, the Ultrasound Technician will analyze the image on the computer

3D ultrasound also called sonograph, is often used in obstetrics during pregnancy, ultrasound uses high frequency sound waves to confirm and the date of a pregnancy and to provide images of the fetus, the placenta and the amniotic fluid (Griffin,2014). A high frequency transducer is used to record the sound waves to determine the size and shape of soft tissue (Ratini,2015). It is also used to create real time visual images of the embryo or fetus in the mother’s womb (Griffin,2014).

An ultrasound has its differences to an x-ray. X-ray for example, exposes the patient to hazardous amounts of iodizing radiation, while an ultrasound uses no radiation and relies on innocuous soundwaves. An ultrasound detects soft tissue and internal organs not detailed imagery of bones and dense tissue like an x-ray. An ultrasound uses very advanced technology to present detailed photographic imaging. An ultrasound has many advantages over an x-ray such as being able to detect

Ultrasound or ultrasonography is a medical imaging technique that uses high frequency sound waves. It is a high pitch frequency that cannot be heard by the human ear. In ultra sound the following happens: High frequency sound pulses (1-5megahertz) are transmitted from the ultrasound machine into your body using a probe. The sound wave will travel into your body until it hits an object such as soft tissue and bone. When the sound wave hits these objects some of the wave will be reflected back to the probe. While some waves may carry on further till they hit another object and then reflected back. The probe picks up these reflected sound waves and relays them to the machine. The distance and time from the probe,