An Ultrasound scan or a Sonography is a diagnostic technique that exposes the body to high-frequency sound waves to produce images of the internal anatomical structures. The ultrasound technique captures images in real-time, so that they can display the movement of the internal organs and blood flowing through the vessels.
Modern ultrasound technology has grown immensely, giving rise to various types of advanced techniques for accurate diagnosis. 3D ultrasound converts sound waves into 3D images to enhance the image quality. 4D ultrasound is a 3D ultrasound in motion. A Doppler ultrasound evaluates the blood flow through the major arteries and the veins in the abdomen, limbs, and neck. Based on their applications, Dopplers can be classified into Spectral, Colour, or Power Doppler scans.