What medical imaging technique utilizes high frequency sound waves and their echoes for diagnostic purposes?

• A. X-ray
• B. Ultrasound
• C. CT scan
• D. MRI

Answer: (B)

The medical imaging technique that utilizes high-frequency sound waves and their echoes for diagnostic purposes is ultrasound. This method involves sending sound waves into the body, which then bounce back or echo from different tissues, allowing for the creation of images of internal organs, blood vessels, and tissues. Ultrasound is especially useful for visualizing soft tissues, monitoring fetal development during pregnancy, and guiding certain medical procedures.

The other imaging methods mentioned (X-ray, CT scan, and MRI) do not operate on the principle of sound wave echoes. X-rays utilize ionizing radiation to create images, CT scans (computed tomography) combine multiple X-ray images and advanced computer processing to produce cross-sectional views of the body, and MRI (magnetic resonance imaging) employs strong magnetic fields and radio waves to generate detailed images of organs and soft tissues. Each of these techniques has its specific applications and uses different technologies compared to ultrasound.