Angling the color Doppler box to the right or left changes the:

When angling the color Doppler box to the right or left, the primary effect is on the Doppler shift. This shift occurs because the angle at which the ultrasound beam intersects the moving blood cells directly influences the frequency of the reflected sound waves. The Doppler effect describes how the frequency of sound waves changes with the motion of the source or observer.

In the context of color Doppler, when the angle of incidence is adjusted, it alters the relative motion detected between the ultrasound waves and the moving targets (like blood cells). A more favorable angle (closer to 0 degrees or 180 degrees) results in a more accurate representation of the true velocity of the blood flow, which is essential for accurate velocity measurement. Therefore, angling the color Doppler box adjusts how the Doppler shift is calculated, impacting the interpretation of flow velocity.

The frame rate is influenced by factors like the depth of the sample volume and the imaging settings but is not directly affected by the angling of the color Doppler box. Dynamic range refers to the range of amplitudes the system can display or process but does not change with the angle of the Doppler box. Flow velocity is a result of the Doppler calculation and is not directly modified by the