Wavelength in soft tissue ranges from _______.

Wavelength in soft tissue ranges from _______.

• A. 0.5 to 1.5 mm
• B. 0.15 to 0.8 mm
• C. 0.01 to 0.05 cm
• D. 1 to 5 cm

Answer: (B)

Wavelength in soft tissue is found by dividing the speed of sound in the tissue by the frequency of the ultrasound wave. In soft tissue, the speed is about 1540 m/s. Diagnostic ultrasound typically uses frequencies roughly from 2 to 10 MHz, which gives wavelengths around 0.15 mm to 0.80 mm. This range aligns with the common imaging wavelengths used clinically, so the option 0.15 to 0.8 mm is the best match. The other ranges are either too large for ultrasound wavelengths in tissue or cover only a portion of the typical range.

Wavelength in soft tissue is found by dividing the speed of sound in the tissue by the frequency of the ultrasound wave. In soft tissue, the speed is about 1540 m/s. Diagnostic ultrasound typically uses frequencies roughly from 2 to 10 MHz, which gives wavelengths around 0.15 mm to 0.80 mm. This range aligns with the common imaging wavelengths used clinically, so the option 0.15 to 0.8 mm is the best match. The other ranges are either too large for ultrasound wavelengths in tissue or cover only a portion of the typical range.