Which matrix size is most commonly used in computed tomography?

The most commonly used matrix size in computed tomography is 512 x 512. This size strikes a balance between image resolution and the amount of data that needs to be stored and processed. A matrix size of 512 x 512 provides a detailed representation of the scanned area and is sufficient for most diagnostic purposes.

When using a smaller matrix size, such as 256 x 256, the images may not have enough detail for accurate diagnosis, particularly in complex areas of anatomy. On the other hand, larger matrix sizes like 1024 x 1024 and 2048 x 2048 can yield finer resolutions, but they also require significantly more processing power and longer scan times. These larger sizes may be utilized in specialized circumstances, but they are not the standard for routine CT imaging.

The choice of a 512 x 512 matrix size helps radiologists obtain high-quality images while managing the efficiency of the scanning process. Hence, this matrix size remains the standard within CT imaging protocols.