How Ultrasound Technology Works – Sonography 101

Before getting into the interpretation of ultrasound technology into medical history, it is very necessary to interpret and know about the meaning of what exactly Ultrasound technology means. Ultrasound is considered as a sound wave that is not audible to human ears and range as predicted between around 20 kilohertz (20, 000) in a youthful adult.

However, among the many popular and common uses and features of ultrasound, the most vibrant one is in the field of sonography, which produces images of fetuses in the human womb. There are many other variable uses of ultrasound apart from healthcare industry, however here we would discuss about Diagnostic sonography that is an ultrasound based diagnostic imaging technique employed as to have subcutaneous body structures including tendons, muscles, joints, vessels and internal organs for possible pathology or lesions. Obstetric sonography is mostly used in pregnancy and is quite popular in public.

For the propose of diagnostic value and importance sonographic scanners are operated in the frequency range of 2 to 18 megahertz, hundred time more stronger to human audibility. Frequency is kept between spatial resolution of the image and imaging depth: lower frequencies produce less resolution but image deeper into the body.

Sonography is performed by professionals who are known as Sonographers. Sonogrpahers uses a hand-held probe called a transducer is placed directly on and moved over the patient. Sonography is very useful for imaging soft tissues of the body. On the surface structures such as muscles, tendons, testes, breast and the neonatal brain are imaged at a higher frequency (7-18 MHz), which give better axial and lateral resolution. Deeper structures such as liver and kidney are imaged at a lower frequency 1-6 MHz with lower axial and lateral resolution but higher penetration.

In sonography transducers send pulses of sound into a material and whenever that sound wave encounters with a different density than that certain part of the sound wave reflects back to the probe and is captured as an echo. There time taken by echo to travel back to the probe is measured and employed in calculating the depth of the tissue interface causing the echo. The greater the difference between acoustic impedances, the larger the echo is. If the pulse hits gases or solids, the density difference is so great that most of the acoustic energy is reflected and it becomes impossible to see deeper.

In medical imaging frequencies are used in the range of 1 to 18 MHz. Higher frequencies generally have a smaller wavelength, and can be used to make sonograms with smaller details. However, the shrinking of the sound wave is increased at higher frequencies, so there have a better diffusion of deeper tissues, and there lower frequency (3-5 MHz) is used.

How Exactly Does Ultrasound Technology Work?

Under Ultrasound that is a sound wave not audible to human ears and ranges between according to estimated scientific calculation to be around 20 kilohertz (20,000) hertz in healthy young and adults. Due to its unique behavior ultrasound is used in a number of areas. However, the most common use for ultrasound technique is in the area of sonography to produce images of fetuses in the human womb. There are many other uses for ultrasound too.

The understanding about the working of an Ultrasound Technology can be understood as under steps as mentioned below as ultrasound machine transmits high-frequency sound pulses into human body for the purpose of probe, these sound waves travel through and into human body and hits on a boundary between tissues for example like among fluid and soft tissue, soft tissue and bone. In the process certain sound waves are reflected back to the probe and some other reaches to another boundary and are get reflected back. There reflected waves are picked up by the probe and then are relayed to the machine.

Then the machine calculates the distance from the probe to the tissue or organ using the speed of sound in tissue and then displays the distances and intensities of the echoes on the screen creating a two dimensional image. In an ultrasound thus millions of pulses and echoes are sent and received each second and thus probe is done in a manner along the surface of the body and angled to receive various views of the body.

In a basic ultrasound machine there happens to be parts like Transducer probe for sending and receiving sound waves, central processing unit (CPU) for doing all the calculations and controlling electrical power supplies.   Transducer pulse controls changes the amplitude, frequency and duration of the pulses as emitted out from the transducer probe. Image display shows the image from ultrasound data processed by the CPU, keyboard cursor insert data and takes measurements from the display. Disk storage device keeps record of the acquired images.

However, with the advancement of the technology now ultrasound machines have become capable of showing three-dimensional images. In these machines a number of two dimensional images are acquired from moving the probe across the body surface or revolving inserted probes. Then after, two dimensional images are thus combined with the help of specific computer software to produce 3-D images to have a better understanding of the fetus. The 3 D imaging is used for a number of therapies and processes and especially in the early detection of cancerous and benign tumors. It is used for the treatment and processes like examining the prostate gland for early detection of tumors, looking for masses in the colon and rectum, detection of breast lesions for possible biopsies.

The Ultimate Guide to Becoming an Ultrasound Technologist – Salary, Career and More

Ultrasound technician is a person who in health care industry defines career for him by employing his learned techniques in ultrasound that is (high frequency sound waves) for diagnostic purposes in medicinal cure by the means of imaging and here we would look at various features of a job in ultra sound.

Nature of the Job: Ultrasound technique is also known as ultra sonography and is known to be as the most popular imaging technique in health care industry. Under the technique, sound waves are used for the purpose of assessment and diagnosis of medical conditions. Mostly, it is related to obstetrics and is used for assessing the condition of fetus in the womb. There are also many other uses of ultrasound too. The technical person who in health care industry performs ultrasonic tests is known as diagnostic songographer or ultrasonographer and he employs special equipments to direct high frequency sound waves as towards the specific part of the human body for the purpose of imaging resulted from the off reflected echoes. These images can be used in physical form of photograph and video tapes.  As the job duties for an ultrasound technician includes explanation of procedures to the patient, tracking and keeping record of imperative medical history of the patient, handling and taking care of the equipments and instruction of patient to receive the best images and keeping patient’s record and maintenance of the equipment. He happens to be an expert in obstetric, gynecologic sonography, neurosonography or ophthalmic sonography. He also keeps record of work schedules, look into equipment purchase or manage diagnostic imaging department.

Training and Educational Qualification: To perform the duties of an ultrasound technician there are certain requirements that are needed immensely like understand and operate ultrasound equipments effectively and should have heavy physical built up to carry and turn around patients. His eyesight should be acute to measure an image in appropriate calculation.  More, he should have excellent communication skills as to mix up with patients to soothe patients while performing various tests.  A person thinking of becoming an ultrasound technician can have training at hospital, vocational technical institution, training from a college or university providing a 2 year or 4 year program for learning ultraosound technique. However, these courses should have accreditation from Allied Education Programs. There is not any provision of license for Diagnostic Medical Sonographers however there are certain bodies like America Registry of Diagnostic Medical Sonographers (ARD MS) certify a course passed out by ultrasound technician and therefore takes a general examination as well as specialty examination. And with the aging population on the rise there would be need of the more ultrasound technicians in America.

Salaries: The Salaries for ultrasound technician range from somewhere around $66, 680 per annum in the USA.

Ultrasound Technologist Schools

Seattle University
Seattle University offers a bachelor’s degree in Diagnostic Ultrasound. It offers opportunities for receiving a liberal arts education, as well as practical and instructive exposure to ultrasound specialties. Students have access to a fully equipped lab with ultrasound imaging systems, computerized classrooms, UltraSim and MedSim, anatomical models and a laboratory library. The coursework includes medical imaging, echocardiography, vascular evaluation and Doppler methods of cardiac evaluation and human cross-section anatomy. A full year internship program is deemed successfully completed after the academic coursework requirements are met and thereafter the sonographer certification is issued upon completion. The program in Diagnostic Ultrasound is fully accredited by the Commission on Accreditation of Allied Health Education Programs.

Ultrasound Technologist School in Ontario, Canada

Mainz Ultrasound Training
Mainz Ultrasound Training offers courses that help one to get certified as an ultrasound technologist in less than two years. The college has trained more than one thousand seven hundred successful students, who are now working all over the world. It offers practical training programs that are developed for allied health professionals; foreign medical graduates and existing ultrasound technologists who wish to acquire additional skills in ultrasound examination. The courses are taught by an American Registry of Diagnostic Medical Sonographers certified instructors with almost 20 years of teaching experience in the field. A certificate of participation is awarded to participants upon successful completion of our training programs.

Rochester Institute of Technology
Rochester Institute of Technology offers a bachelor’s degree program in diagnostic medical sonography. The program runs for two to four years including the internship, depending on prior experience and education. It offers programs in Ultrasound Technology that lead to either a Bachelor of Science degree or a Certificate in Diagnostic Medical Sonography.  The bachelor’s degree in diagnostic medical sonography program emphasizes skills in research and administration and the development of more advanced scanning and diagnostic abilities.

Gurnick Academy of Medical Arts California
Gurnick Academy of Medical Arts provides an ultrasound technologist program for 18 months. The program provides students with in depth knowledge of abdominal sonography, small parts, obstetrics and gynecologic studies, and ultrasound physics instrumentation. The programs have clinical sessions where the students are assigned to clinical rotations in hospitals and various outpatient centers in the community. There is also clinical internship which helps students gain experience that prepares them for entry-level positions in Ultrasonography.

George Washington University
George Washington University offers sonography certificate programs and a bachelor’s degree in sonography. The program emphasizes both theory and practical education with clinical experiences. The program takes two years. It also offers clinical rotations which occur simultaneously with the coursework each semester. Students complete one thousand six hundred and eighty hours of clinical rotations, if pursuing the single clinical practice selection, and require an additional five hundred hours if pursuing a combined clinical practice selection. The sonography certificate program at George Washington University is fully accredited by the Commission for the Accreditation of Allied Health Education Programs (CAAHEP).