Rainbow maps color encoding in vascular studies is to depict what information?

Rainbow maps color encoding in vascular studies is to depict what information?

• A. Tissue stiffness
• B. Acoustic impedance
• C. Flow velocity
• D. Color encoding of brightness

Answer: (C)

The main idea is to visualize how fast blood is moving. Rainbow color maps assign different colors to different flow speeds, so you can see at a glance where blood is moving quickly versus slowly within vessels. This helps identify normal flow patterns, stenosis, or turbulent flow, which are all about velocity, not tissue properties. Tissue stiffness comes from elastography, not color mapping of velocity. Acoustic impedance relates to how tissues reflect sound, not how velocities are colored. Color encoding of brightness isn’t the primary goal here—the spectrum is used to represent velocity magnitude across the region of interest.

The main idea is to visualize how fast blood is moving. Rainbow color maps assign different colors to different flow speeds, so you can see at a glance where blood is moving quickly versus slowly within vessels. This helps identify normal flow patterns, stenosis, or turbulent flow, which are all about velocity, not tissue properties. Tissue stiffness comes from elastography, not color mapping of velocity. Acoustic impedance relates to how tissues reflect sound, not how velocities are colored. Color encoding of brightness isn’t the primary goal here—the spectrum is used to represent velocity magnitude across the region of interest.