Health Encyclopedia

 
  • Ultrasound - Animation

    Ultrasound

    Animation

  • Ultrasound - Animation

    Ultrasound is a useful procedure for monitoring the baby's development in the uterus. Ultrasound uses inaudible sound waves to produce a two-dimensional image of the baby while inside the mother's uterus. The sound waves bounce off solid structures in the body and are transformed into an image on a monitor screen. Solid structures, such as bones and muscles, reflect sound waves and appear as light gray or white. Soft or hollow areas, like the chambers of the heart, don't reflect sound waves and appear dark or black. An ultrasound can supply vital information about a mother's pregnancy and her baby's health. Even though there are no known risks for ultrasound at present, it is highly recommended that pregnant women consult their physician before undergoing this procedure.

  • Ultrasound

    Ultrasound

    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.

    Ultrasound

    illustration

  • Ultrasound, normal fetus - ventricles of brain

    Ultrasound, normal fetus - ventricles of brain

    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. The cross hair is pointing to the front of the skull, and directly to the right, the lines of the ventricles are visible.

    Ultrasound, normal fetus - ventricles of brain

    illustration

  • Ultrasound, normal fetus - arms and legs

    Ultrasound, normal fetus - arms and legs

    This is a normal fetal ultrasound performed at 19 weeks gestation. This is the type of spilt-screen display you might see during an ultrasound, or if the technician prints a copy of the ultrasound for you. This ultrasound shows both the left arm (seen in the left side of the display), and the lower extremities (seen in the right side of the display). The white areas of the arm or legs is developing bone.

    Ultrasound, normal fetus - arms and legs

    illustration

  • Ultrasound, normal fetus - profile view

    Ultrasound, normal fetus - profile view

    This is a normal fetal ultrasound performed at 17 weeks gestation. In the middle of the screen, the profile of the fetus is visible. The outline of the head can be seen in the left middle of the screen with the face down and the body in the fetal position extending to the lower right of the head. The outline of the spine can be seen on the right middle side of the screen.

    Ultrasound, normal fetus - profile view

    illustration

  • Ultrasound, normal fetus - ventricles of brain

    Ultrasound, normal fetus - ventricles of brain

    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 brain

    illustration

  • Ultrasound comparison

    Ultrasound comparison

    To demonstrate how an ultrasound works, imagine this tennis ball as an internal organ in the body. Like many organs, the tennis ball is solid on the outside and hollow on the inside. Solid structures, such as bones and muscles, reflect sound waves from the ultrasound transducer and show up as white in an ultrasound image. Soft or hollow areas, like chambers of the heart, do not reflect sound waves and appear as black. The white ring is the outer edge of the tennis ball being reflected back as an image while the center hollow area remains as black.

    Ultrasound comparison

    illustration

  • Ultrasound, normal relaxed placenta

    Ultrasound, normal relaxed placenta

    This is a normal fetal ultrasound performed at 19 weeks gestation. This ultrasound shows two interesting features. In the foreground, to the left and middle of the screen, you can see the placenta, following the curve of the uterus. In the background on the right, where the cross hair is pointing, you can see the face with all the facial features visible.

    Ultrasound, normal relaxed placenta

    illustration

  • Ultrasound, normal fetus - arm and legs

    Ultrasound, normal fetus - arm and legs

    This is a normal fetal ultrasound performed at 17 weeks gestation. This is the type of image pregnant mothers may see on the ultrasound screen, or that the technician may print. It shows the head on the right, and the cross hair pointing to the left ankle. The left leg and arm are visible in the center of the screen.

    Ultrasound, normal fetus - arm and legs

    illustration

  • Ultrasound, normal placenta - Braxton Hicks

    Ultrasound, normal placenta - Braxton Hicks

    This is a normal ultrasound performed at 17 weeks gestation. It shows the placenta during a normal (Braxton Hicks) contraction. Throughout the pregnancy, the uterus periodically contracts to facilitate better blood flow through the placenta and the fetus. In this ultrasound, the placenta can be seen as the mound-shaped object in the middle of the screen. At the bottom of the image, the mother's vertebra can be seen as a round object. When the uterus is not contracting, the placenta would appear much flatter.

    Ultrasound, normal placenta - Braxton Hicks

    illustration

  • Ultrasound, ventricular septal defect - heartbeat

    Ultrasound, ventricular septal defect - heartbeat

    This is an ultrasound showing a ventricular septal defect pattern of the fetal heartbeat. Some ultrasound machines have the ability to focus on different areas of the heart and evaluate the heartbeat. This is useful in the early diagnosis of congenital heart abnormalities.

    Ultrasound, ventricular septal defect - heartbeat

    illustration

  • Prenatal ultrasound - series

    Prenatal ultrasound - series

    Presentation

  • Ultrasound - Animation

    Ultrasound

    Animation

  • Ultrasound - Animation

    Ultrasound is a useful procedure for monitoring the baby's development in the uterus. Ultrasound uses inaudible sound waves to produce a two-dimensional image of the baby while inside the mother's uterus. The sound waves bounce off solid structures in the body and are transformed into an image on a monitor screen. Solid structures, such as bones and muscles, reflect sound waves and appear as light gray or white. Soft or hollow areas, like the chambers of the heart, don't reflect sound waves and appear dark or black. An ultrasound can supply vital information about a mother's pregnancy and her baby's health. Even though there are no known risks for ultrasound at present, it is highly recommended that pregnant women consult their physician before undergoing this procedure.

  • Ultrasound

    Ultrasound

    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.

    Ultrasound

    illustration

  • Ultrasound, normal fetus - ventricles of brain

    Ultrasound, normal fetus - ventricles of brain

    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. The cross hair is pointing to the front of the skull, and directly to the right, the lines of the ventricles are visible.

    Ultrasound, normal fetus - ventricles of brain

    illustration

  • Ultrasound, normal fetus - arms and legs

    Ultrasound, normal fetus - arms and legs

    This is a normal fetal ultrasound performed at 19 weeks gestation. This is the type of spilt-screen display you might see during an ultrasound, or if the technician prints a copy of the ultrasound for you. This ultrasound shows both the left arm (seen in the left side of the display), and the lower extremities (seen in the right side of the display). The white areas of the arm or legs is developing bone.

    Ultrasound, normal fetus - arms and legs

    illustration

  • Ultrasound, normal fetus - profile view

    Ultrasound, normal fetus - profile view

    This is a normal fetal ultrasound performed at 17 weeks gestation. In the middle of the screen, the profile of the fetus is visible. The outline of the head can be seen in the left middle of the screen with the face down and the body in the fetal position extending to the lower right of the head. The outline of the spine can be seen on the right middle side of the screen.

    Ultrasound, normal fetus - profile view

    illustration

  • Ultrasound, normal fetus - ventricles of brain

    Ultrasound, normal fetus - ventricles of brain

    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 brain

    illustration

  • Ultrasound comparison

    Ultrasound comparison

    To demonstrate how an ultrasound works, imagine this tennis ball as an internal organ in the body. Like many organs, the tennis ball is solid on the outside and hollow on the inside. Solid structures, such as bones and muscles, reflect sound waves from the ultrasound transducer and show up as white in an ultrasound image. Soft or hollow areas, like chambers of the heart, do not reflect sound waves and appear as black. The white ring is the outer edge of the tennis ball being reflected back as an image while the center hollow area remains as black.

    Ultrasound comparison

    illustration

  • Ultrasound, normal relaxed placenta

    Ultrasound, normal relaxed placenta

    This is a normal fetal ultrasound performed at 19 weeks gestation. This ultrasound shows two interesting features. In the foreground, to the left and middle of the screen, you can see the placenta, following the curve of the uterus. In the background on the right, where the cross hair is pointing, you can see the face with all the facial features visible.

    Ultrasound, normal relaxed placenta

    illustration

  • Ultrasound, normal fetus - arm and legs

    Ultrasound, normal fetus - arm and legs

    This is a normal fetal ultrasound performed at 17 weeks gestation. This is the type of image pregnant mothers may see on the ultrasound screen, or that the technician may print. It shows the head on the right, and the cross hair pointing to the left ankle. The left leg and arm are visible in the center of the screen.

    Ultrasound, normal fetus - arm and legs

    illustration

  • Ultrasound, normal placenta - Braxton Hicks

    Ultrasound, normal placenta - Braxton Hicks

    This is a normal ultrasound performed at 17 weeks gestation. It shows the placenta during a normal (Braxton Hicks) contraction. Throughout the pregnancy, the uterus periodically contracts to facilitate better blood flow through the placenta and the fetus. In this ultrasound, the placenta can be seen as the mound-shaped object in the middle of the screen. At the bottom of the image, the mother's vertebra can be seen as a round object. When the uterus is not contracting, the placenta would appear much flatter.

    Ultrasound, normal placenta - Braxton Hicks

    illustration

  • Ultrasound, ventricular septal defect - heartbeat

    Ultrasound, ventricular septal defect - heartbeat

    This is an ultrasound showing a ventricular septal defect pattern of the fetal heartbeat. Some ultrasound machines have the ability to focus on different areas of the heart and evaluate the heartbeat. This is useful in the early diagnosis of congenital heart abnormalities.

    Ultrasound, ventricular septal defect - heartbeat

    illustration

  • Prenatal ultrasound - series

    Prenatal ultrasound - series

    Presentation

Review Date: 6/25/2018

Reviewed By: Jason Levy, MD, Northside Radiology Associates, Atlanta, GA. Also reviewed by David Zieve, MD, MHA, 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. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., a business unit of Ebix, Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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