Question

which term is correct when describing bone cortex on ultrasound?
anechoic
hypoechic
compact fibrillar pattern
hyperechoic

Explanation:

• Anechoic means no echoes (black on ultrasound), which is not bone cortex.
• Hypoechoic means less echoes (darker gray), not bone cortex.
• Compact fibrillar pattern is not a standard ultrasound echo - related term for bone cortex description.
• Hyperechoic means high echoes (bright white on ultrasound). Bone cortex reflects a lot of ultrasound waves, so it appears hyperechoic.

Answer:

hyperechoic