In fact, the M-mode is the vertical coordinate that represents the depth of an organ or tissue, and the horizontal coordinate that represents time, so that a motion-time curve is obtained. The horizontal and vertical coordinates represent time, so that a motion-time curve is obtained. This is easier for cardiac ultrasound to measure certain data, and we often combine it with 2D ultrasound.
Two-dimensional ultrasound is also commonly referred to as B-mode ultrasound, also called fan ultrasound, which takes a fan-shaped cross-section and displays it through glow modulation. This is actually done the same for other organs.
Type D is the ultrasound that applies the Doppler effect to show the effect of dynamic organs and blood flow
Color Doppler is a technique that further utilizes the Doppler effect to analyze and display spatial blood flow in real time.
For example, blood flow toward the probe is usually artificially colored red and backward blue. The flow rate, the brightness of the color represents the level of the flow rate, and so on.
Nowadays, the cardiac ultrasound equipment is generally all these have, for example, when you do the M type above can also have a corresponding two-dimensional cardiac ultrasound cross-section display, so that more clearly corresponds to the relationship. The actual application, we according to the different needs of their own adjustments.