I am rendering a 3D medical image, and want to normalize the input data to have a zero mean and unit variance, i.e. to subtract from each voxel the mean and then divide it by the std. I have googled but failed to find a solution. May I ask if there is a existing filter, or how I can achieve this? Thanks.

Hi,

The `Python Calculator`

filter may be used to standardize values for image data.

The following is an example of applying it to a `Wavelet`

source. Here, the following is written in `Expression`

:

```
(RTData-mean(RTData))/std(RTData)
```

Thanks!