Reflection in ultrasound is described as waves moving in which direction?

Reflection in ultrasound is described as waves moving in which direction?

• A. Back toward the soundhead
• B. Forward into deeper tissue
• C. Sideways along the skin
• D. Upward into air

Answer: (A)

Reflection occurs when part of the ultrasound pulse hits a boundary and returns toward the source. In imaging, the transducer both emits the pulse and then listens for echoes that travel back to it. That returning energy—moving back toward the soundhead—is what creates the image. So, reflected waves move back toward the soundhead. Energy that goes forward into deeper tissue is transmission, not reflection, and sideways or upward into air isn’t the direction used for the returning echo in standard ultrasound imaging.

Reflection occurs when part of the ultrasound pulse hits a boundary and returns toward the source. In imaging, the transducer both emits the pulse and then listens for echoes that travel back to it. That returning energy—moving back toward the soundhead—is what creates the image. So, reflected waves move back toward the soundhead. Energy that goes forward into deeper tissue is transmission, not reflection, and sideways or upward into air isn’t the direction used for the returning echo in standard ultrasound imaging.