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Topic: Ultrasound

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Ultrasonic

Pelvic ultrasound

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	Ultrasound - Wikipedia, the free encyclopedia
		Ultrasound is sound with a frequency greater than the upper limit of human hearing, this limit being approximately 20 kilohertz (20,000 hertz).
		Ultrasound is used in UAL (= ultrasound-assisted lipectomy), or liposuction.
		Ultrasound generator/speaker systems are sold with claims that they frighten away rodents and insects, but there is no scientific evidence that the devices work; controlled tests have shown that rodents quickly learn that the speakers are harmless.
	en.wikipedia.org /wiki/Ultrasound (873 words)

	Medical ultrasonography - Wikipedia, the free encyclopedia
		Ultrasound image quality is limited by the amount of overlying adipose(fat) tissue, as the fatty tissue tends to scatter the sound and greater depth leads to attenuation of the sound beam.
		Ultrasound is commonly used during pregnancy to check on the development of the fetus.
		Ultrasound performs very poorly when there is a gas between the scan head and the organ of interest, due to the extreme differences in acoustical impedance.
	en.wikipedia.org /wiki/Medical_ultrasonography (2626 words)

	Obstetric ultrasound -- a comprehensive guide to ultrasound scans in pregnancy
		Ultrasound scan is currently considered to be a safe, non-invasive, accurate and cost-effective investigation in the fetus.
		In both these situations, careful ultrasound examination should be made to exclude intraulterine growth retardation and congenital malformation in the fetus such as intestinal atresia, hydrops fetalis or renal dysplasia.
		Further developments in doppler ultrasound technology in recent years have enabled a great expansion in it's application in Obstetrics, particularly in the area of assessing and monitoring the well-being of the fetus, its progression in the face of intrauterine growth restriction, and the diagnosis of cardiac malformations.
	www.ob-ultrasound.net (3712 words)

	General Ultrasound Imaging
		Ultrasound is a useful way of examining many of the body's internal organs, including but not limited to the heart, liver, gallbladder, spleen, pancreas, kidneys and bladder.
		Ultrasound imaging is used extensively for evaluating the eyes, pelvic and abdominal organs, heart and blood vessels, and can help a physician determine the source of pain, swelling or infection in many parts of the body.
		Ultrasound scanners consist of a console containing a computer and electronics, a video display screen and a transducer that is used to scan the body.
	www.radiologyinfo.org /content/ultrasound-general.htm (1373 words)

	Fetal Ultrasound
		A fetal ultrasound is a test done during pregnancy that uses reflected sound waves to produce a picture of a fetus, the organ that nourishes the fetus (placenta), and the liquid that surrounds the fetus (amniotic fluid).
		Transvaginal ultrasound is generally done early in a pregnancy to determine fetal age or to detect a suspected ectopic pregnancy.
		A fetal ultrasound is a test done during pregnancy that uses reflected sound waves to produce a picture of your fetus, the organ that nourishes your fetus (placenta), and the liquid that surrounds your fetus (amniotic fluid).
	webmd.com /hw/being_pregnant/hw4693.asp?lastselectedguid={5FE84E90-B... (1616 words)

	Imaginis - Ultrasound Imaging of the Breasts (Site not responding. Last check: 2007-10-21)
		Breast ultrasound, also known as sonography or ultrasonography, is frequently used to evaluate breast abnormalities that are found with screening or diagnostic mammography or during a physician performed clinical breast exam.
		Additionally, ultrasound can often quickly determine if a suspicious area is in fact a cyst (always non-cancerous) or an increased density of solid tissue (dense mass) which may require a biopsy to determine if it is malignant (cancerous).
		Ultrasound may help detect some breast masses and is the best way to determine whether a cyst is present without placing a needle into the area of concern to aspirate fluid.
	imaginis.com /breasthealth/ultrasound.asp (1223 words)

	Ultrasound Imaging of the Musculoskeletal System
		An ultrasound image is a useful way of examining the musculoskeletal system of the body to detect problems with muscles, tendons, ligaments, joints and soft tissue.
		Ultrasound images are captured in real time, so they can often show movement, function and anatomy, as well as enable radiologists to diagnose a variety of conditions and assess damage after an injury or illness.
		A radiologist, who is a physician experienced in ultrasound and other radiology examinations, will analyze the images and send a signed report with his or her interpretation to the patient's personal physician.
	www.radiologyinfo.org /content/ultrasound-muscskel.htm (1096 words)

	Ultrasound (Site not responding. Last check: 2007-10-21)
		Abdominal Ultrasound examinations may be ordered for the patient with abdominal pain, abnormal laboratory tests, follow up to other types of imaging tests, evaluation of the aorta for aneurysm, or a variety of other symptoms and indications.
		A brief, conventional pelvic ultrasound exam is performed prior to an endovaginal exam to evaluate the entire pelvis and adnexa, therefore patients should follow the same prep required for a conventional pelvic ultrasound exam.
		Scrotum: Ultrasound and color Doppler ultrasound are used in assessing a painful testicle or in the case of a testicular mass.
	www.wakerad.com /Default.aspx?tabid=44 (1208 words)

	Ultrasound image (Site not responding. Last check: 2007-10-21)
		Notice that in an ultrasound image solid areas are depicted in 'white' and the fluid areas in 'fl'.
		When similar images are seen on the screen during a scanning session, mothers often thought this is the face of the fetus (with the two eyes, nose and mouth) as they would tend to wrongly perceive the image as a picture taken with a camera in front of the fetus.
		At that time when ultrasound scanning was first invented the scans were single-pass scans and were known as 'static scans' as compared to the multi-pass realtime scans we have now.
	www.ob-ultrasound.net /sliceabd.html (253 words)

	Untitled1
		ultrasound is ultrasound*a language to speak of clouds.
		ultrasound is a den haag (aka the hague) netherlands, austin texas unification.
		director rfovetz brings together ultrasound (featuring ovetz on bass and soundscapes, kirk laktas on guitaar and james alexander on viola) with legendary fellow texan filmmaker luke savisky and dancer/choreographer helen pokrovskaia to create a moving, resonant circular meditation on the perceiver perceiving, the tension of borders and the new wordless pathways that emerge.
	www.ultrasoundsite.homestead.com (551 words)

	Imaginis - Ultrasound Imaging (US) (Site not responding. Last check: 2007-10-21)
		Ultrasound is also extensively used for evaluating the kidneys, liver, pancreas, heart, and blood vessels of the neck and abdomen.
		Ultrasound can also be used to guide fine needle, tissue biopsy to facilitate sampling cells from an organ for lab testing (for example, to test for cancerous tissue).
		Ultrasound is also being used more and more to image the breasts and to guide biopsy of breast cancer.
	www.imaginis.com /ultrasound (698 words)

	Abdominal Ultrasound, a gentle introduction. 7-1298
		The nearest analogy to ultrasound is the ground Radar, used at an airport.
		The investigator is using ultrasound images and the position of the probe to produce a mental construct of what is inside the patient.
		The repeat rate of the image display is affected by the ultrasound hardware and may affect the position of your fixations.
	myweb.lsbu.ac.uk /~dirt/museum/usnd-intro.html (1371 words)

	Ultrasound
		A screening ultrasound is sometimes done during the course of a pregnancy to monitor normal fetal growth and verify the due date.
		In an abdominal ultrasound, gel is applied to the abdomen and the ultrasound transducer glides over the gel on the abdomen to create the image.
		Ultrasound is a technique that is constantly being improved and refined.
	www.healthsystem.virginia.edu /uvahealth/peds_hrpregnant/ultrasou.cfm (387 words)

	ultrasound on Encyclopedia.com
		ULTRASOUND [ultrasound] or sonography, in medicine, technique that uses sound waves to study and treat hard-to-reach body areas.
		Ultrasound is used in cardiology to detect heart damage and in ophthalmology to detect retinal problems.
		Ultrasound is noninvasive, involves no radiation, and avoids the possible hazards—such as bleeding, infection, or reactions to chemicals—of other diagnostic methods.
	www.encyclopedia.com /html/u1/ultrasnd.asp (429 words)

	Ultrasound: Everything you need to know
		An ultrasound (also called a sonogram) is a noninvasive diagnostic test that uses sound waves to create a visual image of your baby, placenta, and uterus, as well as other pelvic organs.
		If this is your first ultrasound and your baby is more than two weeks behind or ahead of where he should be, sizewise, it's likely that your due date is off and you'll be given a new one.
		An ultrasound may also be done at other times during your pregnancy to check on your baby's condition; as part of other tests, such as the nuchal translucency test, chorionic villus sampling, or amniocentesis; or as a follow-up to the multiple marker test.
	www.babycenter.com /refcap/pregnancy/prenatalhealth/329.html (2342 words)

	Ultrasound - MayoClinic.com
		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.
		Ultrasound is based on the same principles as sonar —; a technology used to detect underwater objects.
		During an ultrasound exam, you lie on an examination table and a small amount of warm gel is applied to your skin.
	www.mayoclinic.com /health/ultrasound/PR00053 (731 words)

	Ultrasound
		For example, if your first ultrasound, done at 8 or 10 weeks, says you are due on the 1st of May, and an ultrasound done 6 or 8 weeks later says you are due the 20th of May, the second ultrasound does not change the due date.
		The second ultrasound should be interpreted that the baby is not growing at the expected rate (the baby is not as large as it should be).
		If an ultrasound was done early in pregnancy (and we have the results of that first scan) then a second trimester ultrasound not only permits us to look for abnormalities, but also to evaluate how the baby is growing.
	www.fortcollinsradiology.com /ultra_obstetrical.html (1475 words)

	Ultrasound
		Ultrasound is more accurate than palpation at all stages than palpation or radiography.
		Ultrasound is especially useful between days d 33-45, because it is too late to palpate and too early for radiographs.
		Ultrasound has great value in obstetrical use in the determination of fetal viability.
	www.vetmed.lsu.edu /eiltslotus/Theriogenology-5361/ultrasound.htm (842 words)

	Ultrasound in Wound Healing
		Ultrasound is a mechanical vibration delivered at a frequency above the range of human hearing.
		Clinical ultrasound units currently being manufactured typically deliver ultrasound at frequencies of 1 and 3 MHz with duty cycles ranging from 20 to 100 percent.
		As the frequency of ultrasound is increased, the penetration of the signal decreases.
	www.medicaledu.com /ultrasnd.htm (876 words)

	Medical References: Ultrasound
		Ultrasound is a technique that uses sound waves to show a picture of a baby (fetus) in the womb.
		If ultrasound is needed very early in pregnancy, sound waves may be delivered by a probe inserted into the vagina, a technique called transvaginal ultrasound, or by placing the probe at the opening of the vagina, called translabial ultrasound.
		Ultrasound may be used to diagnose a pregnancy that is located in a fallopian tube or the abdomen instead of in the uterus.
	www.marchofdimes.com /professionals/681_1167.asp (1748 words)

	Ultrasound - RadiologyChannel.net
		Ultrasound sampling of a single line across the brain is known as A-mode testing.
		Doing an ultrasound of multiple lines is almost like putting a piece of paper over the face of a coin and drawing lines over it with a soft pencil.
		Most ultrasound departments assign white to bright reflectors such as bone, gas, and stones, and fl to the low reflectors that allow sound to pass fairly freely, like fluid in the gallbladder and urinary bladder.
	www.radiologychannel.net /ultrasound (842 words)

	ultrasound articles on Encyclopedia.com (Site not responding. Last check: 2007-10-21)
		Ultrasound School On the Campus of Delray Medical Center.
		ultrasound ULTRASOUND [ultrasound] or sonography, in medicine, technique that uses sound waves to study and treat hard-to-reach body areas.
		In scanning with ultrasound, high-frequency sound waves are transmitted to the area of interest and the returning echoes recorded (for more detail, see ultrasonics).
	www.encyclopedia.com /articles/13205.html (391 words)

	Ultrasound - Heart Disease and other cardiovascular conditions on MedicineNet.com
		An ultrasound test is a radiology technique, which uses high- frequency sound waves to produce images of the organs and structures of the body.
		Ultrasound is commonly used to guide fluid withdrawal (aspiration) from the chest, lungs, or around the heart.
		Ultrasound is also commonly used to evaluate the structure of the thyroid gland in the neck.
	www.medicinenet.com /ultrasound/article.htm (585 words)

	Pelvic Ultrasound
		Pelvic ultrasound may be used early in pregnancy to check the age of the pregnancy or to find a tubal pregnancy (ectopic pregnancy) or multiple pregnancy.
		Ultrasound costs less than other tests that make pictures of organs and structures in the body, such as a computed tomography (CT) scan or magnetic resonance imaging (MRI).
		Transvaginal ultrasound is used during fertility checks for removing ovarian follicles for in vitro fertilization.
	www.webmd.com /hw/healthy_women/hw5395.asp (2282 words)

	On the safety of prenatal ultrasound (Site not responding. Last check: 2007-10-21)
		The new ultrasound machines will beep at certain levels of energy output but essentially there will be little or no limit on the energy the health care provider may choose to use.
		Among the seven trials that evaluated an ultrasound before 20 weeks (with or without additional late ultrasound), only the Helsinki trial and a meta-analysis heavily influenced by that trial's results were able to demonstrate a statistically significant benefit in lowering perinatal mortality.
		In the experimental group, 11 induced abortions were performed because of ultrasound findings and two babies died with major anomalies, compared to no abortions and 10 deaths with anomalies in the control group.
	www.alternamoms.com /ultrasound.html (1699 words)

	Ultrasound Visualization Research
		An AR system displaying live ultrasound data or laparoscopic range data in real time and properly registered to the part of the patient that is being scanned could be a powerful and intuitive tool that could be used to assist and to guide the physician during various types of ultrasound-guided and laparoscopic procedures.
		Ultrasound guidance is also often used for needle localization of some lesions prior to biopsy, as well as for cyst aspiration.
		Ultrasound probe tracking was performed with a high-precision, mechanical tracking device that provided correct registration between individual ultrasound slices.
	www.cs.unc.edu /~us (1059 words)

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