Is the rescale slope the same for all dicom in one sery?

Beginner Questions
1

Let’s say, one sery has 100 dicom files. Is the rescale slope (0028, 1053) must the same for all 100 dicom file? Or it may be different for dicom files in one sery?

Any suggestion is appreciated~~~

2

As rescale and slope are encoded per file, it can be different for every file in the series. Mostly, it is the same for all the files in a series.