Which technique uses high-frequency sound waves for non-invasive body imaging?

Ultrasonography uses high-frequency sound waves to create images of the inside of the body in a non-invasive manner. The technique involves emitting ultrasonic waves, which travel through the body and reflect off tissues and organs. The reflected sound waves are captured and converted into visual images that can be displayed on a screen, allowing for real-time visualization of structures.

This method is particularly advantageous in medical imaging due to its safety, as it does not involve ionizing radiation unlike X-rays or computed tomography scans. It is widely used for various applications, including monitoring fetal development during pregnancy and diagnosing conditions in soft tissues and organs.

In contrast, the other imaging techniques like magnetic resonance imaging (MRI) utilize strong magnetic fields and radio waves, which differ fundamentally from the sound waves used in ultrasonography. Computed tomography (CT) combines X-ray technology and computer processing to create cross-sectional images, while X-ray imaging employs ionizing radiation to produce static images, making them distinct from the dynamic capabilities of ultrasonography.