Enter the contrast in the image and the contrast in the target into the Calculator. The calculator will evaluate the Modulation Transfer Function.

## Modulation Transfer Function Formula

MTF = CI / CT

Variables:

- MTF is the Modulation Transfer Function ()
- CI is the contrast in the image
- CT is the contrast in the target

To calculate the Modulation Transfer Function, divide the contrast in the image by the contrast in the target.

## How to Calculate Modulation Transfer Function?

The following steps outline how to calculate the Modulation Transfer Function.

- First, determine the contrast in the image.
- Next, determine the contrast in the target.
- Next, gather the formula from above = MTF = CI / CT.
- Finally, calculate the Modulation Transfer Function.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

contrast in the image = 1.78

contrast in the target = 2.94