# How to normalize the intensity?
**URL:** https://discourse.slicer.org/t/how-to-normalize-the-intensity/28052
**Category:** Support
**Created:** [February 26, 2023, 10:05am UTC](https://discourse.slicer.org/t/how-to-normalize-the-intensity/28052 "2023-02-26T10:05:47Z")
**Posts on this page:** 3
**Page:** 1
### Author:  [@Floren](https://discourse.slicer.org/u/Floren)
#### Post date: [February 26, 2023, 10:05am UTC](https://discourse.slicer.org/t/how-to-normalize-the-intensity/28052/1 "2023-02-26T10:05:47Z")
Hello, everyone!
I am working with prostate adc maps and trying to measure adc value for prostate tumors in order to demonstrate that there is a correlation between adc value and Gleason score.
I understood that i must first normalize the intensity of the images. The problem is that i don’t really know how to do that.
I appreciate any information you may have.
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### Author:  [@Young\_Wang](https://discourse.slicer.org/u/Young_Wang)
#### Post date: [February 27, 2023, 7:05pm UTC](https://discourse.slicer.org/t/how-to-normalize-the-intensity/28052/2 "2023-02-27T19:05:58Z")
@Floren The way I typically do it, not sure if it’s the best way
1. module finder
2. simple filter
3. rescaleIntensityImageFilter
I suggest you make a clone of your volume first, and then output into a different volume so you still have a copy of the original.
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### Author:  [@Antmaker](https://discourse.slicer.org/u/Antmaker)
#### Post date: [May 11, 2026, 8:20pm UTC](https://discourse.slicer.org/t/how-to-normalize-the-intensity/28052/3 "2026-05-11T20:20:36Z")
Depending what you would like to normalize it to, the ShiftScaleImageFilter could also be a good option (src: [Is it possible to rescale intensity of a volume?](https://discourse.slicer.org/t/is-it-possible-to-rescale-intensity-of-a-volume/2543))
If you would like to normalize to something like the Hounsfield Unit (HU), then [Grey values (GV) to HU units conversion](https://discourse.slicer.org/t/grey-values-gv-to-hu-units-conversion/16277) provides a more advanced approach.