What do we use to engage fremitus?

What do we use to engage fremitus?

• A. Power Doppler
• B. Color Doppler
• C. Spectral Doppler
• D. B-mode imaging

Answer: (A)

Fremitus is the vibration that travels through tissue when it is set into motion. To visualize that motion with ultrasound, you want an imaging mode that detects movement rather than just static structure. Power Doppler fits this need because it is highly sensitive to even very low-velocity motion and does not depend on the direction of flow. It detects the presence and strength of Doppler signals from all directions, making subtle tissue vibrations easier to see. In contrast, Color Doppler and Spectral Doppler rely on measurable Doppler shifts with a defined flow direction and velocity, which can miss faint or non-directional motion. B-mode imaging shows anatomy but not motion, so it wouldn’t reveal fremitus. So Power Doppler is the best choice to engage fremitus.

Fremitus is the vibration that travels through tissue when it is set into motion. To visualize that motion with ultrasound, you want an imaging mode that detects movement rather than just static structure. Power Doppler fits this need because it is highly sensitive to even very low-velocity motion and does not depend on the direction of flow. It detects the presence and strength of Doppler signals from all directions, making subtle tissue vibrations easier to see. In contrast, Color Doppler and Spectral Doppler rely on measurable Doppler shifts with a defined flow direction and velocity, which can miss faint or non-directional motion. B-mode imaging shows anatomy but not motion, so it wouldn’t reveal fremitus. So Power Doppler is the best choice to engage fremitus.