Which medical imaging technique uses sound waves to visualize internal organs?

Ultrasound is the medical imaging technique that utilizes sound waves to create visual images of internal organs within the body. It operates on the principle of echography, where high-frequency sound waves are emitted from a transducer, which then bounce off tissues and organs. The echoes are captured and processed to form real-time images that can be observed on a monitor. This non-invasive technique is particularly advantageous due to its safety, as it does not involve radiation exposure, making it suitable for various applications, including prenatal imaging, organ assessment, and guiding certain medical procedures.

In contrast, MRI employs strong magnetic fields and radio waves to generate detailed images of the body's internal structures, while CT scans use X-ray technology combined with computer processing to produce cross-sectional images. X-rays, on the other hand, are primarily used for visualizing bones and diagnosing conditions such as fractures. Each imaging modality has its specific uses and advantages, but when it comes to the use of sound waves for visualization, ultrasound is the correct method.