1. Ultrasound - Wikipedia, The Free Encyclopedia ultrasound is cyclic sound pressure with a frequency greater than the upper limit of human hearing. Although this limit varies from person to person, http://en.wikipedia.org/wiki/Ultrasound

Ultrasound From Wikipedia, the free encyclopedia Jump to: navigation search For other uses, see Ultrasound (disambiguation) Ultrasound is cyclic sound pressure with a frequency greater than the upper limit of human hearing . Although this limit varies from person to person, it is approximately 20 kilohertz (20,000 hertz) in healthy, young adults and thus, 20 kHz serves as a useful lower limit in describing ultrasound. The production of ultrasound is used in many different fields, typically to penetrate a medium and measure the reflection signature or supply focused energy. The reflection signature can reveal details about the inner structure of the medium. The most well known application of this technique is its use in sonography to produce pictures of fetuses in the human womb. There are a vast number of other applications as well. Approximate frequency ranges corresponding to ultrasound, with rough guide of some applications A fetus in its mother's womb, viewed in a sonogram (brightness scan) Contents Ability to hear ultrasound Diagnostic sonography Biomedical ultrasonic applications Industrial ultrasound ... edit Ability to hear ultrasound The upper frequency limit in humans (approximately 20 kHz) is caused by the middle ear , which acts as a low-pass filter Ultrasonic hearing can occur if ultrasound is fed directly into the skull bone and reaches the cochlea without passing through the middle ear. Carefully-designed scientific studies have been performed and confirmed what they call the

2. Obstetric Ultrasound A Comprehensive Guide To Ultrasound Scans Comprehensive guide to Obstetric/ prenatal ultrasound. Covers all aspects of sonography in pregnancy and the fetus. http://www.ob-ultrasound.net/

A Comprehensive Guide Rated among the top 5% of all Internet sites by Lycos in 1995 And consistently ranked first on Google for the keyword " Ultrasound" What are Obstetric Ultrasound Scans? Obstetric Ultrasound is the use of ultrasound scans in pregnancy. Since its introduction in the late 1950’s ultrasonography has become a very useful diagnostic tool in Obstetrics. Currently used equipments are known as real-time scanners , with which a continous picture of the moving fetus can be depicted on a monitor screen. Very high frequency sound waves of between 3.5 to 7.0 megahertz (i.e. 3.5 to 7 million cycles per second) are generally used for this purpose. They are emitted from a transducer which is placed in contact with the maternal abdomen, and is moved to "look at" (likened to a light shined from a torch) any particular content of the uterus. Repetitive arrays of ultrasound beams scan the fetus in thin slices and are reflected back onto the same transducer. The information obtained from different reflections are recomposed back into a picture on the monitor screen (a sonogram, or ultrasonogram). Movements such as fetal heart beat and malformations in the feus can be assessed and measurements can be made accurately on the images displayed on the screen. Such measurements form the cornerstone in the assessment of gestational age, size and growth in the fetus.

3. Ultrasound - General Current and accurate information for patients about ultrasound General . Learn what you might experience, how to prepare for the exam, benefits, http://www.radiologyinfo.org/en/info.cfm?pg=genus

4. MedlinePlus: Ultrasound ultrasound uses highfrequency sound waves to look at organs and structures inside the body. Health care professionals use them to view the heart, http://www.nlm.nih.gov/medlineplus/ultrasound.html

imageNames = false; @import url(http://www.nlm.nih.gov/medlineplus/images/advanced.css); @import url(http://www.nlm.nih.gov/medlineplus/images/header.css); @import url(http://www.nlm.nih.gov/medlineplus/images/menubutton.css); Skip navigation @import url("http://www.nlm.nih.gov/medlineplus/images/consumer_health_20.css"); Other Health Topics: A B C D ... List of All Topics Related Topics Diagnostic Imaging Prenatal Testing Diagnostic Tests Go Local Services and providers for Ultrasound in the U.S. Select Location AL - Alabama AR - Arkansas AZ - Arizona AZ - Tribal Connections Four Corners CO - Tribal Connections Four Corners DE - Delaware GA - Georgia IL - Illinois IN - Indiana MA - Massachusetts MD - Maryland MI - Michigan MN - Minnesota NC - North Carolina NE - Nebraska NM - New Mexico NM - Tribal Connections Four Corners NV - Nevada OH - Ohio - Southeast SC - South Carolina TX - Central Texas TX - East Texas TX - South Texas TX - Texas Gulf Coast UT - Tribal Connections Four Corners UT - Utah VT - Vermont WY - Wyoming Select from map Ultrasound Also called: Sonogram Ultrasound uses high-frequency sound waves to look at organs and structures inside the body. Health care professionals use them to view the heart, blood vessels, kidneys, liver and other organs. During pregnancy, doctors use ultrasound tests to examine the fetus. Unlike x-rays, ultrasound does not involve exposure to radiation.

5. All About Ultrasounds - BabyCenter Find out how an ultrasound is done, what it can tell you about your baby, and more. http://www.babycenter.com/0_all-about-ultrasounds_329.bc

var debugDojo = false; You seem to have disabled JavaScript. To take full advantage of our site and functionality, we recommend you enable Javascript. How? My husband, the decorator Your mom had it easier, or so you say advertisement site search articles videos products ... See All Store... mboxCreate("bc20_topnav_stages_default"); Upgrade your Flash Player now » AC_FL_RunContent = 0; var so = new SWFObject("/swf/timeline.swf", "timeline", "956", "46", "8", "#FFFFFF"); so.addParam("wmode", "transparent"); so.addParam("salign", "t"); so.addVariable("children_xml", ""); so.write("flashcontent"); Development Calendar Baby Name Finder Ovulation Calculator Due Date Calculator ... All Popular Areas... mboxCreate ("bc20_leftnav_default"); advertisement mboxCreate("bc20_leftrail_top_promo"); Our Sponsors Aveeno Baby Cord Blood Registry Garanimals GoodNites ... Viacord mboxCreate("bc20_leftrail_bottom_promo"); Home Pregnancy Prenatal Tests All about ultrasounds Reviewed by the BabyCenter Medical Advisory Board Last updated: May 2006 e-mail print Highlights What is an ultrasound?

6. Howstuffworks "How Ultrasound Works" ultrasound can help doctors look inside a patient s body to see everything from heart valves to a moving baby. Find out how ultrasound works, http://www.howstuffworks.com/ultrasound.htm

HowStuffWorks.com RSS Make HowStuffWorks your homepage Get Newsletter Search HowStuffWorks and the web: Health Health Care Related Categories: REFERENCE LINKS Print Email Cite Please copy/paste the following text to properly cite this How Stuff Works article: How Ultrasound Works by Craig Freudenrich, Ph.D. Inside This Article Introduction to How Ultrasound Works What is Ultrasound? The Ultrasound Machine Different Types of Ultrasound Major Uses of Ultrasound ... articles There are many reaons to get an ultrasound. Perhaps you are pregnant, and your obstetrician wants you to have an ultrasound to check on the developing baby or determine the due date. Maybe you are having problems with blood circulation in a limb or your heart , and your doctor has requested a Doppler ultrasound to look at the blood flow. Ultrasound has been a popular medical imaging technique for many years. Ultrasound Image Gallery Photo courtesy Philips Research Ultrasound examination during pregnancy. See more pictures related to ultrasound In this edition of How Stuff Works , we will look at how ultrasound works, what type of ultrasound techniques are available and what each technique can be used for.

7. Ultrasound Imaging Procedure Information On MedicineNet.com Provides an overview on what an ultrasound is, its purpose and preparation for the test, and how the results are transmitted to physician and patient. http://www.medicinenet.com/ultrasound/article.htm

About Us Site Map April 3, 2008 home heart center heart a-z list ultrasound index > ultrasound article Font Size A A A Ultrasound Index ... Glossary Ultrasound What is an ultrasound? For what purposes are ultrasounds performed? How do patients prepare for an ultrasound? How are results transmitted to the patient and doctor? What is an ultrasound? An ultrasound test is a radiology technique, which uses high- frequency sound waves to produce images of the organs and structures of the body. The sound waves are sent through body tissues with a device called a transducer. The transducer is placed directly on top of the skin, which has a gel applied to the surface. The sound waves that are sent by the transducer through the body are then reflected by internal structures as "echoes." These echoes return to the transducer and are transmitted electrically onto a viewing monitor. The echo images are then recorded on a plane film and can also be recorded on videotape. After the ultrasound, the gel is easily wiped off. The technical term for ultrasound testing and recording is "sonography." Ultrasound testing is painless and harmless. Ultrasound tests involve no radiation and studies have not revealed any adverse effects.

8. Home - Ultrasound Amplifiers ultrasound Amplifiers, manufacturer and distributor of AG30, DS-200, DS-300, PRO-100, PRO-200, and DI Plus. Compare specs, read reviews, browse product http://www.ultrasoundamps.com/

Welcome to UltraSound Amplifiers UltraSound Amplifiers is the premier manufacturer of acoustic amplifiers in the music industry today! UltraSound offers the most comprehensive line of acoustic amplifiers with models available for every need and budget. If you're looking for an acoustic amplifier that will reproduce the authentic tone of your acoustic instrument, you've come to the right place. Ultrasound amps are known worldwide for their tone quality and the faithful reproduction of "any" acoustic Instrument. To learn more about why UltraSound Amplifiers are the best sounding acoustic amplifiers in the world visit our Acoustic Amps 101 page and be sure to check out product pages for full product specifications. To hear an UltraSound Amplifier for yourself contact one of our Dealers DSX PowerStack - 100 Watt Modular Acoustic Amplifier with 4 - 8" Coaxial Speakers and 100% All-Natural Tone

9. Ultrasound - MayoClinic.com ultrasound imaging — Overview describes what it is, how it works and when it s used. http://www.mayoclinic.com/health/ultrasound/PR00053

Medical Services Health Information Appointments Education and Research ... About Ultrasound You may associate ultrasound images with a developing fetus. But ultrasound is used in many areas of medicine. Find out what it's used for and how it's performed. Ultrasound examination, also called diagnostic medical sonography or sonography, is an imaging method that uses high-frequency sound waves to produce precise images of structures within your body. These images often provide information that's valuable in diagnosing and treating a variety of diseases and conditions. Who is an ultrasound for? You may need to undergo an ultrasound for a variety of reasons. Ultrasound may be used, among other things, to: Evaluate a fetus Diagnose gallbladder disease Evaluate flow in blood vessels Guide a needle biopsy Guide the biopsy and treatment of a tumor Check your thyroid gland Study your heart Diagnose some forms of infection Diagnose some forms of cancer Reveal abnormalities in the scrotum and prostate MORE ON THIS TOPIC Fetal ultrasound: What can it tell you?

10. Ultrasound : American Pregnancy Association An ultrasound exam, or sonogram, uses highfrequency sound waves to scan a woman s abdomen. http://www.americanpregnancy.org/prenataltesting/ultrasound.html

American Pregnancy Association home about partners ... tribute gift search Getting Pregnant Infertility Adoption Pregnancy Options ... Pregnancy Calculator Most Popular Articles Understanding Ovulation Ovulation Calendar Pregnancy Signs and Symptoms Bleeding During Pregnancy ... Prenatal Testing Utrasound: Sonogram Email An ultrasound exam is a procedure that uses high-frequency sound waves to scan a woman's abdomen and pelvic cavity, creating a picture (sonogram) of the baby and placenta. Although the terms ultrasound and sonogram are technically different, they are used interchangeably and reference the same exam. What types of ultrasound are there? There are basically seven different ultrasound exams, but the principle process is the same. The different types of procedures include: Transvaginal Scans: Specially designed probe transducers are used inside the vagina to generate sonogram images. Most often used during the early stages of pregnancy. Standard Ultrasound: Traditional ultrasound exam which uses a transducer over the abdomen to generate 2-D images of the developing fetus . Advanced Ultrasound: This exam is similar to the standard ultrasound, but the exam targets a suspected problem and uses more sophisticated equipment.

11. Download Details: Ultrasound - Monitoring And Troubleshooting Tool For File Repl ultrasound is a monitoring and troubleshooting tool for the File Replication Service (FRS). http://www.microsoft.com/downloads/details.aspx?FamilyID=61acb9b9-c354-4f98-a823

12. Ultrasound Philips ultrasound Landing page. Advancing ultrasound technology to meet all your applications needs for better patient care. Philips Medical Systems. http://www.medical.philips.com/us/products/ultrasound/

_page.writeBreadCrumb("1_2") _page.writeLeftNav("1_2") Ultrasound See what you've never seen before Live 3D TEE transducer provides 'real time' visualization never seen before. Learn more The New HD7 System World class image quality in an affordable and mobile unit More Pushing the Boundaries 3 key reasons to step up to the iU22 More Ultrasound Guided Nerve Block Achieving a clearer view More Keeping the beat Comprehensive heart failure management More Three-vessel view and multislice imaging Important techniques and tools to explore 3D fetal heart data Read the white paper Watch video Disease Management Congenital Heart Disease Heart Failure Liver Disease Intraoperative Vascular - incision site assessment Upgrades for cardiology Pushing the boundaries on our ultrasound products iE33 Vision 2008 EnVisor Upgrade 2007 Upgrades for general imaging Our latest upgrades offer enhanced features and advanced capabilities iU22 Vision 2008 EnVisor Upgrade 2007 Clinical Images DICOM ... eNewsetter archives

13. Journal Of Ultrasound In Medicine Official journal of the American Institute of ultrasound in Medicine. http://www.jultrasoundmed.org/

Instructions to authors Subscriptions About the journal Editorial board ... The American Institute of Ultrasound in Medicine publishes Journal of Ultrasound in Medicine. Stanford University Libraries' assists in the publication of JUM Online Take JUM CME Tests Online! Select an Issue from the Archive January 1982 - April 2008 Search for Articles January 1982 - April 2008 Future Editorial Content Article Statistics Most-Read Articles Most-Cited Articles Current Issue: April 2008 (Next: April 24) Quick Search advanced Author: (e.g., Smith, JS) Keyword(s): Year: Vol: Page: Print ISSN: 0278-4297 Online ISSN: 1550-9613

14. IngentaConnect Publication: Ultrasound Publisher Maney Publishing on behalf of the British Medical ultrasound Society. 17 issues are available electronically. Key. Free Content Free Content http://www.ingentaconnect.com/content/1742-271X

Home About Ingenta Ingenta Labs Ingenta Blog ... Check our FAQs Or contact us to report problems with: Subscription access Article delivery Registration Library administrator tasks ... Other problems For Publishers Why go online? Why choose IngentaConnect? Beyond Print: enhancing your service Access and authentication ... Contact us For Researchers For Authors About IngentaConnect Search and browse Publications available ... Register For Librarians Resource Zone Why choose IngentaConnect? Why choose IngentaConnect Complete? Activating Subscriptions ... Register CM8ShowAd("HorizontalBanner"); Ultrasound ISSN 1742-271X, Online ISSN: 1743-1344 visit publication homepage Online submission, tracking and refereeing system now live at http://ult.edmgr.com Publisher: Maney Publishing on behalf of the British Medical Ultrasound Society issues are available electronically Key: - Free Content - New Content - Subscribed Content - Free Trial Content CM8ShowAd("Skyscraper"); Volume 16 Number 1, February 2008 Volume 15 Number 4, November 2007

15. Ultrasound Detailed information on ultrasonograpy, also called sonography including information on how the procedure is performed. http://www.healthsystem.virginia.edu/UVAHealth/adult_radiology/ultra.cfm

University of Virginia Health System Skip Navigation Health System Calendars ... UVa HS Web People Home Why Choose UVa Make an Appointment Health Professionals ... Careers UVa Health.com... where Answers are found Newsletters Breast Health Diabetes Health Heart Health Men's Health ... Interactive Resources Topics All About Cancer All About Heart Blood Disorders Bone Disorders Breast Health Cancer Cardiovascular Disease Dermatology Diabetes Digestive Disorders Endocrinology Environmental Medicine Eye Care Glossary Gynecological Health Heart Infectious Diseases Kidney Disease Men's Health Mental Health Nervous System Disorders Non-Trauma Emergency Oral Health Orthopaedics Otolaryngology Pathology Pediatrics, General Health Prostate Health Radiology Respiratory Disorders Skin Cancer Stroke Surgical Care Urology Women's Health Search This Site Radiology Ultrasound What is an ultrasound? An ultrasound procedure is a non-invasive (the skin is not pierced) diagnostic procedure used to assess soft tissue structures such as muscles, blood vessels, and organs. Ultrasound uses a transducer that sends out ultrasonic sound waves at a frequency too high to be heard. When the transducer is placed at certain locations and angles, the ultrasonic sound waves move through the skin and other body tissues to the organs and structures within. The sound waves bounce off the organs like an echo and return to the transducer. The transducer picks up the reflected waves, which are then converted by a computer into an electronic picture of the organs or tissues under study.

16. Cardiovascular Ultrasound | Home Page Bmode ultrasound common carotid artery intima-media thickness and external diameter cross-sectional and longitudinal associations with carotid http://www.cardiovascularultrasound.com/

Skip to main content Log on / register BioMed Central home Journals A-Z ... About Cardiovascular Ultrasound Editor-in-Chief: Eugenio Picano, CNR Institute of Clinical Physiology View the Editorial Board Open access to all articles Tracked/indexed by PubMed PubMed Central Medline Embase ... Scopus and Google Scholar Instructions for authors submitting a manuscript Contact us View the 10 most accessed articles Promote the journal Posters, leaflets, T-Shirts and more. Quick guide to the website View answers to some Frequently Asked Questions More information Cardiovascular Ultrasound is recommended by the European Society for Noninvasive Cardiovascular Dynamics This journal has been supported in part by a grant from the Information Program New Opportunities Fund of the Open Society Institute. Welcome to Cardiovascular Ultrasound An online journal published by BioMed Central Cardiovascular Ultrasound is ready to receive papers on all aspects of ultrasound in cardiovascular physiology and disease. Submit your article online Research Feasibility and diagnostic power of transthoracic coronary Doppler for coronary flow velocity reserve in patients referred for myocardial perfusion imaging Eva Maret, Jan Engvall, Eva Nylander, Jan Ohlsson

17. FDA Cautions Against Ultrasound 'Keepsake' Images FDA says that prenatal ultrasounds are being performed for the wrong reasons. http://www.fda.gov/FDAC/features/2004/104_images.html

FDA Home Page Search FDA Site FDA A-Z Index Contact FDA ... To a Friend FDA Consumer magazine January-February 2004 Issue FDA Cautions Against Ultrasound 'Keepsake' Images By Carol Rados It's risky business taking pictures of unborn babies when there's no medical need to do so. That's the word from the Food and Drug Administration, which is concerned about companies trying to turn an important medical procedure into a prenatal portrait tool. Facilities with captivating names such as Fetal Fotos, Peek-a-Boo, Womb with a View, and Baby Insight are popping up in strip malls and shopping centers all over the country. And they're promoting "keepsake videos" that use the latest ultrasound technology to produce high-resolution three-dimensional and four-dimensional (moving) images showing the surface anatomy of babies developing in the womb. The lure of this burgeoning industry is that parents-to-be get to see characteristics like facial features, hair, and even the baby's sex, and often they can count fingers and toes before their baby is born. Some women even have videos made at various stages of their baby's growth. And the videos are often being marketed as a prized addition to collections of childhood memorabilia. As compelling as these sneak previews may be, the FDA is warning women about the potential hazards of getting keepsake videos. The agency also is warning companies against creating them for entertainment purposes. While ultrasound has been around for many years, expectant women and their families need to know that the long-term effects of repeated ultrasound exposures on the fetus are not fully known. In light of all that remains unknown, having a prenatal ultrasound for non-medical reasons is not a good idea.

18. During Your Pregnancy - March Of Dimes Nonmedical use of ultrasound during pregnancy should be avoided. For more information, read the March of Dimes fact sheet on ultrasound. http://www.marchofdimes.com/pnhec/159_523.asp

View All Chapters Find Your Local Chapter Before You're Pregnant During Your Pregnancy Complications Caring for Your Baby ... Prematurity Campaign Ultrasound Who: Most pregnant women. Why: To check the age of the baby, identify a multiple pregnancy (twins or more), check the baby’s growth and size, and look for major birth defects. Also used to help diagnose certain pregnancy complications. When: Usually at 18-20 weeks; at other times, as needed. How: Ultrasound uses sound waves to show a picture of the baby on a screen. The health care provider rubs a handheld device, called a transducer, across the woman’s belly or inserts a probe into her vagina. The woman feels pressure as the provider moves the transducer, but usually no pain. Risks: Considered safe for the mother and baby when properly used and when medical information about pregnancy is needed. Non-medical use of ultrasound during pregnancy should be avoided. For more information, read the March of Dimes fact sheet on ultrasound KEEPING HEALTHY Prenatal Care Choosing a Prenatal Care Provider Due Date Calculator How Your Baby Grows ... Prepare for Disaster THINGS TO AVOID Alcohol Smoking and Pregnancy Marijuana Ecstasy and Methamphetamine ... Avoid Rodents PRENATAL TESTS Your First Tests Amniocentesis CF Carrier Screen Chorionic Villus Sampling (CVS) ... Ultrasound CHANGES DURING PREGNANCY Abdominal Pain or Cramping Backache Breast Changes Congestion and Nosebleeds ... Swelling This widget requires javascript and Flash Player 9 to function properly.

19. AIUM Home American Institute of ultrasound in Medicine. http://www.aium.org/

aium.org Home Contact Us Member/E-associate Login Practice Mgmt ... CME Activities Publications Journal of Ultrasound in Medicine JUM Online Sound Waves ... Technical Standards About the AIUM History Leadership Awards Committees ... Refer a Colleague 2008 Postgraduate Courses On Board Highlights JOIN NOW! Renew your membership or e-association ... Become a Student/Fellow/Resident Member (pdf) Become an International E-Associate Apply for Senior Membership (members only) Survey: Clinical Sonography Specialist Needs Analysis Join us in our 'Push for a Million'! Donate to the EER Fund Now AIUM's Innovative "Mosaic Ultrasound Poster" wins 2007 MarCom Gold Award AIUM CEO Named Among "Most Influential" in Radiology ... (members only) The AIUM offers the following CME activities: JUM Video Programs Events Credentialing Supporters

20. Wiley InterScience :: JOURNALS :: Journal Of Clinical Ultrasound See Also. Journal of Clinical ultrasound 19731995 . Journal of Clinical ultrasound. Enter words or phrases. Select a Field. All Fields, Article Titles http://www.interscience.wiley.com/jpages/0091-2751

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