What's the difference between tomography and three-dimensional imaging?

The difference between tomographic imaging and three-dimensional imaging is that the imaging principle and application field are slightly different:

1. Tomography is a method to generate three-dimensional images by collecting multiple slice images on different planes and superimposing these slice images together. Common tomography techniques include computed tomography (CT) and magnetic resonance imaging (MRI). Tomography can provide high-resolution tomographic images, and can observe and analyze the internal tissue structure and pathological changes of human body more clearly.

2.3D imaging is a method of directly obtaining and presenting 3D images. It can form a complete three-dimensional image through multi-angle image reconstruction, and can also use voxels (three-dimensional pixels) to build a three-dimensional image. Three-dimensional imaging is often used in medical diagnosis, computer graphics, virtual reality and other fields. Common three-dimensional imaging technologies include computer aided design (CAD), stereo photography, laser scanning and so on. Generally speaking, tomography generates a three-dimensional image by superimposing multiple slice images, while three-dimensional imaging directly obtains and presents the three-dimensional image. They are slightly different in imaging principles and application fields, but they can provide important image information for medical and scientific research fields.