Which color always represents the baseline in color Doppler imaging?

In color Doppler imaging, the baseline is represented by the color black. This designation signifies the level of no velocity, meaning that there is no blood flow detected moving towards or away from the transducer. The colors used in Doppler imaging, such as red and blue, signify the direction of blood flow relative to the transducer, with red typically indicating flow towards the transducer and blue indicating flow away from it. Consequently, black stands apart as it represents the absence of flow or baseline, which is crucial for clinicians to identify regions where there is no movement and to interpret blood flow direction accurately. Understanding the significance of these color representations is essential for effective and precise analysis in Doppler ultrasound studies.