What is the contrast improvement factor in grid ?
The contrast improvement factor is the ratio of the contrast with a grid used to contrast without a grid used.
The contrast improvement factor denoted by K.
K = Contrast with grid used / contrast without grid used.
Contrast improvement factor measure the ability of improve contrast. Hence the grid is improving the image quality. The contrast improvement factor range is 1.5 to 3.5. The contract improvement factor depends on KVp, field size and phantom thickness.