# Difference between 2d 3d and 4d ultrasound

dimension is any measurable spatial extension, either by its length, width, height, depth, thickness … The terms 2D, 3D and 4D are used according to the number of dimensions they portray.  Difference between 2d 3d and 4d ultrasound

If you do not understand the difference between these three concepts, then we will clarify it for you.

## 2D  Difference between 2d 3d and 4d ultrasound

This term describes the two-dimensional, that is; that which has only two dimensions. That which is projected flat in physical space (as well as the Powerpuff Girls dolls).

For example, a photograph or drawing of a car is usually two-dimensional; because by means of the drawing you can only see and measure the length and width; but its depth cannot be known.

## 3D

On the other hand, the term 3D refers to three-dimensionality. That is, to the way we perceive our reality.

It is said that something is three-dimensional when it has three dimensions, either: length, width and depth.

Continuing with the example of the car, the cars that we see passing in our reality are three-dimensional; because we can measure each of the three dimensions mentioned above.

## 4D

From what we have said previously, it is sure that it is not necessary to clarify what the term 4D refers to; because it clearly describes the fourth dimension.

The fourth dimension is an abstract concept, which derives from the generalization of the rules of three-dimensionality; adding the factor of time and movement. For example, a three-dimensional object that moves is considered to have four dimensions.

The 4D concept is very difficult to understand, since it is not something that can be captured in visible reality.

### Differences between 2D, 3D and 4D

1. 2D = two dimensions, 3D = three dimensions, and 4D = four dimensions.
2. Two-dimensional (2D) objects are projected flat and their depth is indistinguishable. Three-dimensional objects are those whose width, depth, and length are known. The four-dimensional objects are those to which in addition to being able to measure the elements that are measured to the three-dimensional ones, the factor of time and movement is also added.
3. 2D = flat, 3D = like real life and 4D = abstract concept.
4. Examples of 2D figures: square, triangle, circle.
5. Examples of 3D figures: cylinder, sphere, cube, pyramid.
6. Example of a 4D figure: 4 polyhedron polytopes (composed of two dimensional polygons).