Using Gimp to reduce noise in series of X-Ray Dataset?

[Ofnuts]

So, you have data, and this data is transformed into an image so that a human can evaluate it. That doesn't make that image a good basis for further processing; if you want to scientifically enhance your data you should work from the initial data. In addition, in Gimp, image processing is designed to process pictures and can be polluted by concepts that are nice for general images (gamma correction) but irrelevant for raw data.

There are signal processing libraries that can work wonders. With Python, stat with NumPy and SciPy.