3D Ultrasound

An ultrasound is an imaging tool which works on high-frequency sound waves to produce images of structures within the body to diagnose a problem. Ultrasounds are very common during pregnancy as they help monitor the growth of the baby, check the placenta and assess overall pregnancy health. They are different from X-rays because they do not use any radiation which makes them a safe and preferred choice during pregnancy.

What Is a 3D Ultrasound?

A 3D ultrasound scan uses advanced ultrasound technology to produce three-dimensional images of the baby. Rather than displaying flat two-dimensional images, the scanner produces a detailed view of the baby’s face and body structures by combining several ultrasound images. Many parents prefer a 3D ultrasound to get a clearer view of their baby while healthcare providers may use it to evaluate certain developmental concerns more closely.

3D Ultrasound vs. Traditional Ultrasound

3D ultrasound is an advanced technique which provides enhanced visualisation. Below are some key differences between a traditional USG and 3D USG.

How Does a 3D Ultrasound Work?

Ultrasound utilises high-frequency sound waves to scan internal body structures and organs, thereby producing images. Throughout pregnancy, these sound waves enable health care professionals to determine the baby’s healthy growth and development. Conventional ultrasounds and 3D ultrasounds work on same basic principles with differences in how the images are processed and displayed.

Working of a 3D Ultrasound

Many people wonder, “How does a 3D ultrasound work?”

Ultrasound machine emits high-frequency sound waves through a hand-held probe called a transducer. The sound waves travel in the body and bounce back when they reach the organs, tissues or baby. The returning sound waves are then interpreted by a computer to create an image.

For a 3D ultrasound, a series of images from many different angles is used together by special software to create an image in 3 dimensions which allows an enhanced visualisation of the fetus’s external organs (face, hands and feet etc).

How Can You Get a 3D Ultrasound?

A 3D ultrasound may be recommended by your doctor as part of routine prenatal care or when additional visual assessment of fetal anatomy is required. The scan is performed by trained healthcare professionals using specialised ultrasound equipment.

Your healthcare provider can advise whether a 3D ultrasound is appropriate based on factors such as gestational age, medical history, and the purpose of the examination.

When Is a 3D Ultrasound Done?

A 3D ultrasound can be performed at different stages of pregnancy but image quality often depends on gestational age and the baby’s position. For visualisation of facial features and external anatomy, many healthcare providers find that images are often clearest between 24 and 32 weeks of pregnancy.

Several factors can influence the quality of the images, including:

• Gestational age
• Baby’s position
• Amount of amniotic fluid
• Placental location
• Maternal body composition

Your healthcare provider can recommend the most appropriate timing based on your pregnancy and the purpose of the scan.

What Happens During a 3D Ultrasound?

A 3D ultrasound is a simple, non-invasive procedure that is performed similarly to a standard pregnancy ultrasound. The exact process and timing may vary depending on the stage of pregnancy and the purpose of the scan.

Before the Scan

Depending on the stage of pregnancy and the type of ultrasound being performed, your healthcare provider may provide specific preparation instructions. In some cases, particularly during early pregnancy, you may be asked to have a full bladder before the examination.

During the Procedure

A 3D ultrasound is usually performed through the abdomen and typically involves the following steps:

• You will lie comfortably on an examination table.
• A clear, water-based gel will be applied to the abdomen.
• The sonographer will move a transducer over the skin.
• Sound waves will create images of the baby inside the uterus.
• Computer software will combine multiple images to generate a three-dimensional view.

The examination is painless and may take between 20 and 45 minutes based on the baby’s position and the information being assessed.