BACK TOTOP Browse A-ZSearchBrowse A-ZABCDEFGHIJKLMNOPQRSTUVWXYZ0-9 E-mail FormEmail ResultsName:Email address:Recipients Name:Recipients address:Message: Print-FriendlyBookmarksbookmarks-menuUltrasoundSonogramUltrasound uses high-frequency sound waves to make images of organs and structures inside the body. How the Test is Performed An ultrasound machine makes images so that organs inside the body can be examined. The machine sends out high-frequency sound waves, which reflect off body structures. A computer receives the waves and uses them to create a picture. Unlike with an x-ray or CT scan, this test does not use ionizing radiation. The test is done in the ultrasound or radiology department. You will lie down for the test. A clear, water-based gel is applied to the skin on the area to be examined. The gel helps with the transmission of the sound waves. A handheld probe called a transducer is moved over the area being examined. You may need to change position so that other areas can be examined. How to Prepare for the Test Your preparation will depend on the part of the body being examined. How the Test will Feel Most of the time, ultrasound procedures do not cause discomfort. The conducting gel may feel a little cold and wet. You will feel the sonographer press the ultrasound probe against your body in the area they are reviewing. Why the Test is Performed The reason for the test will depend on your symptoms. An ultrasound test may be used to identify problems involving:Arteries in the neck Arteries in the neckIntravascular ultrasound (IVUS) is a diagnostic test. This test uses sound waves to see inside blood vessels. It is useful for evaluating the coron...ImageRead Article Now Book Mark Article Veins or arteries in the arms or legs Veins or arteries in the arms or legsThis test uses ultrasound to look at the blood flow in the large arteries and veins in the arms or legs.ImageRead Article Now Book Mark Article Pregnancy PregnancyA pregnancy ultrasound is an imaging test that uses sound waves to create a picture of how a baby is developing in the womb. It is also used to chec...ImageRead Article Now Book Mark Article Pelvis PelvisA pelvic (transabdominal) ultrasound is an imaging test. It is used to examine organs in the pelvis.Read Article Now Book Mark Article Abdomen and kidneys Abdomen and kidneysAbdominal ultrasound is a type of imaging test. It is used to look at organs in the abdomen, including the liver, gallbladder, spleen, pancreas, and...ImageRead Article Now Book Mark Article Breast BreastBreast ultrasound is a test that uses sound waves to examine the breasts.ImageRead Article Now Book Mark Article Thyroid ThyroidA thyroid ultrasound is an imaging method to see the thyroid, a gland in the neck that regulates metabolism (the many processes that control the rate...ImageRead Article Now Book Mark Article Eye and orbitEye and orbitAn eye and orbit ultrasound is a test to look at the eye area. It also measures the size and structures of the eye.ImageRead Article Now Book Mark Article Normal Results Results are considered normal if the organs and structures being examined look OK. What Abnormal Results Mean The meaning of abnormal results will depend on the part of the body being examined and the problem found. Talk to your health care provider about your questions and concerns. Risks There are no known risks. The test does not use ionizing radiation. Considerations Some types of ultrasound tests need to be done with a probe that is inserted into your body. Talk to your provider about how your test will be done.Open ReferencesReferencesButts C. Ultrasound. In: Roberts JR, Custalow CB, Thomsen TW, eds. Roberts and Hedges' Clinical Procedures in Emergency Medicine and Acute Care. 7th ed. Philadelphia, PA: Elsevier; 2019:chap 66.Fowler GC, Lefevre N. Emergency department, hospitalist, and office ultrasound (POCUS). In: Fowler GC, ed. Pfenninger and Fowler's Procedures for Primary Care. 4th ed. Philadelphia, PA: Elsevier; 2020:chap 214.Merritt CRB. Physics of ultrasound. In: Rumack CM, Levine D, eds. Diagnostic Ultrasound. 5th ed. Philadelphia, PA: Elsevier; 2018:chap 1.Morris AE, Adamson R, Frank J. Ultrasonography: principles and basic thoracic and vascular imaging. In: Broaddus VC, Ernst JD, King TE, et al, eds. Murray and Nadel's Textbook of Respiratory Medicine. 7th ed. Philadelphia, PA: Elsevier; 2022:chap 23.AllVideoImagesTogAbdominal ultrasound - illustration Abdominal ultrasound is a scanning technique used to image the interior of the abdomen. Like the X-ray, MRI, and CT scan, it has its place as a diagnostic tool. Ultrasound scans use high frequency sound waves to produce an image and do not expose the individual to radiation. The procedure is painless and safe.Abdominal ultrasoundillustrationUltrasound in pregnancy - illustration The ultrasound has become a standard procedure used during pregnancy. It can demonstrate fetal growth and can detect increasing numbers of conditions including meningomyelocele, congenital heart disease, kidney abnormalities, hydrocephalus, anencephaly, club feet, and other deformities. Ultrasound does not produce ionizing radiation and is considered a very safe procedure for both the mother and the fetus.Ultrasound in pregnancyillustration17 week ultrasound - illustration During seventeen to twenty weeks of development, fetal movements known as quickening are commonly felt by the mother.17 week ultrasoundillustration30 week ultrasound - illustration Around 30 weeks, the growth of the brain markedly increases. Most systems are well developed, and the fetus can see and hear. A baby may survive if born this early, although the lungs may still be immature.30 week ultrasoundillustrationCarotid duplex - illustration Carotid duplex is an ultrasound procedure performed to assess blood flow through the carotid artery to the brain. High-frequency sound waves are directed from a hand-held transducer probe to the area. These waves bounce off the arterial structures and produce a 2-dimensional image on a monitor, which will make obstructions or narrowing of the arteries visible.Carotid duplexillustrationThyroid ultrasound - illustration Thyroid ultrasound is a sound wave picture of the thyroid gland taken by a hand-held instrument and translated to a 2-dimensional picture on a monitor. It is used in diagnosis of tumors, cysts or goiters of the thyroid, and is a painless, no-risk procedure.Thyroid ultrasoundillustrationUltrasound - illustration Ultrasound is a scanning technique used to image the growing fetus. The transducer portion emits inaudible sound waves, which fan out as they travel through your abdomen. When they hit dense structures like the fetus and the wall of your uterus, the sound waves bounce back to the transducer and are translated into a visual image by the computer.UltrasoundillustrationUltrasound, normal fetus - ventricles of brain - illustration This is a normal fetal ultrasound performed at 17 weeks gestation. The development of the brain and nervous system begins early in fetal development. During an ultrasound, the technician usually looks for the presence of brain ventricles. Ventricles are spaces in the brain that are filled with fluid. In this early ultrasound, the ventricles can be seen as light lines extending through the skull, seen in the upper right side of the image.Ultrasound, normal fetus - ventricles of brainillustration3D ultrasound - illustration 3D ultrasound provides a three dimensional image of the fetus. Sound waves are sent at different angles by the transducer for the computer to reconstruct the height, width, and depth of the image.3D ultrasoundillustrationAbdominal ultrasound - illustration Abdominal ultrasound is a scanning technique used to image the interior of the abdomen. Like the X-ray, MRI, and CT scan, it has its place as a diagnostic tool. Ultrasound scans use high frequency sound waves to produce an image and do not expose the individual to radiation. The procedure is painless and safe.Abdominal ultrasoundillustrationUltrasound in pregnancy - illustration The ultrasound has become a standard procedure used during pregnancy. It can demonstrate fetal growth and can detect increasing numbers of conditions including meningomyelocele, congenital heart disease, kidney abnormalities, hydrocephalus, anencephaly, club feet, and other deformities. Ultrasound does not produce ionizing radiation and is considered a very safe procedure for both the mother and the fetus.Ultrasound in pregnancyillustration17 week ultrasound - illustration During seventeen to twenty weeks of development, fetal movements known as quickening are commonly felt by the mother.17 week ultrasoundillustration30 week ultrasound - illustration Around 30 weeks, the growth of the brain markedly increases. Most systems are well developed, and the fetus can see and hear. A baby may survive if born this early, although the lungs may still be immature.30 week ultrasoundillustrationCarotid duplex - illustration Carotid duplex is an ultrasound procedure performed to assess blood flow through the carotid artery to the brain. High-frequency sound waves are directed from a hand-held transducer probe to the area. These waves bounce off the arterial structures and produce a 2-dimensional image on a monitor, which will make obstructions or narrowing of the arteries visible.Carotid duplexillustrationThyroid ultrasound - illustration Thyroid ultrasound is a sound wave picture of the thyroid gland taken by a hand-held instrument and translated to a 2-dimensional picture on a monitor. It is used in diagnosis of tumors, cysts or goiters of the thyroid, and is a painless, no-risk procedure.Thyroid ultrasoundillustrationUltrasound - illustration Ultrasound is a scanning technique used to image the growing fetus. The transducer portion emits inaudible sound waves, which fan out as they travel through your abdomen. When they hit dense structures like the fetus and the wall of your uterus, the sound waves bounce back to the transducer and are translated into a visual image by the computer.UltrasoundillustrationUltrasound, normal fetus - ventricles of brain - illustration This is a normal fetal ultrasound performed at 17 weeks gestation. The development of the brain and nervous system begins early in fetal development. During an ultrasound, the technician usually looks for the presence of brain ventricles. Ventricles are spaces in the brain that are filled with fluid. In this early ultrasound, the ventricles can be seen as light lines extending through the skull, seen in the upper right side of the image.Ultrasound, normal fetus - ventricles of brainillustration3D ultrasound - illustration 3D ultrasound provides a three dimensional image of the fetus. Sound waves are sent at different angles by the transducer for the computer to reconstruct the height, width, and depth of the image.3D ultrasoundillustration Tests for Ultrasound UltrasoundUltrasound pregnancyDoppler ultrasound exam of an arm or legDuplex ultrasound Pelvic ultrasound - abdominalTransvaginal ultrasoundThyroid ultrasoundTranscranial Doppler ultrasoundBreast ultrasoundBreast biopsy - ultrasoundRelated Information Cardiac intravascular ultrasound(Surgery) Review Date: 7/5/2022 Reviewed By: Jason Levy, MD, FSIR, Northside Radiology Associates, Atlanta, GA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team. The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. 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UltrasoundSonogramUltrasound uses high-frequency sound waves to make images of organs and structures inside the body. How the Test is Performed An ultrasound machine makes images so that organs inside the body can be examined. The machine sends out high-frequency sound waves, which reflect off body structures. A computer receives the waves and uses them to create a picture. Unlike with an x-ray or CT scan, this test does not use ionizing radiation. The test is done in the ultrasound or radiology department. You will lie down for the test. A clear, water-based gel is applied to the skin on the area to be examined. The gel helps with the transmission of the sound waves. A handheld probe called a transducer is moved over the area being examined. You may need to change position so that other areas can be examined. How to Prepare for the Test Your preparation will depend on the part of the body being examined. How the Test will Feel Most of the time, ultrasound procedures do not cause discomfort. The conducting gel may feel a little cold and wet. You will feel the sonographer press the ultrasound probe against your body in the area they are reviewing. Why the Test is Performed The reason for the test will depend on your symptoms. An ultrasound test may be used to identify problems involving:Arteries in the neck Arteries in the neckIntravascular ultrasound (IVUS) is a diagnostic test. This test uses sound waves to see inside blood vessels. It is useful for evaluating the coron...ImageRead Article Now Book Mark Article Veins or arteries in the arms or legs Veins or arteries in the arms or legsThis test uses ultrasound to look at the blood flow in the large arteries and veins in the arms or legs.ImageRead Article Now Book Mark Article Pregnancy PregnancyA pregnancy ultrasound is an imaging test that uses sound waves to create a picture of how a baby is developing in the womb. It is also used to chec...ImageRead Article Now Book Mark Article Pelvis PelvisA pelvic (transabdominal) ultrasound is an imaging test. It is used to examine organs in the pelvis.Read Article Now Book Mark Article Abdomen and kidneys Abdomen and kidneysAbdominal ultrasound is a type of imaging test. It is used to look at organs in the abdomen, including the liver, gallbladder, spleen, pancreas, and...ImageRead Article Now Book Mark Article Breast BreastBreast ultrasound is a test that uses sound waves to examine the breasts.ImageRead Article Now Book Mark Article Thyroid ThyroidA thyroid ultrasound is an imaging method to see the thyroid, a gland in the neck that regulates metabolism (the many processes that control the rate...ImageRead Article Now Book Mark Article Eye and orbitEye and orbitAn eye and orbit ultrasound is a test to look at the eye area. It also measures the size and structures of the eye.ImageRead Article Now Book Mark Article Normal Results Results are considered normal if the organs and structures being examined look OK. What Abnormal Results Mean The meaning of abnormal results will depend on the part of the body being examined and the problem found. Talk to your health care provider about your questions and concerns. Risks There are no known risks. The test does not use ionizing radiation. Considerations Some types of ultrasound tests need to be done with a probe that is inserted into your body. Talk to your provider about how your test will be done.Open ReferencesReferencesButts C. Ultrasound. In: Roberts JR, Custalow CB, Thomsen TW, eds. Roberts and Hedges' Clinical Procedures in Emergency Medicine and Acute Care. 7th ed. Philadelphia, PA: Elsevier; 2019:chap 66.Fowler GC, Lefevre N. Emergency department, hospitalist, and office ultrasound (POCUS). In: Fowler GC, ed. Pfenninger and Fowler's Procedures for Primary Care. 4th ed. Philadelphia, PA: Elsevier; 2020:chap 214.Merritt CRB. Physics of ultrasound. In: Rumack CM, Levine D, eds. Diagnostic Ultrasound. 5th ed. Philadelphia, PA: Elsevier; 2018:chap 1.Morris AE, Adamson R, Frank J. Ultrasonography: principles and basic thoracic and vascular imaging. In: Broaddus VC, Ernst JD, King TE, et al, eds. Murray and Nadel's Textbook of Respiratory Medicine. 7th ed. Philadelphia, PA: Elsevier; 2022:chap 23.