What is different HU and voxel value

Support
1

HI.

1. I open dicom file’s header using 3D Slicer. i can get LargestImagePixelValue and smallestImagePixelValue.
image

2. And I check Volumes’ Histogram using 3D Slicer. and I check HU(HounsField Unit) Range.
image

but Two results are different.
pixel value range(first works result) is 0~4095. but HU(HounsField Unit) Range(Second works result) is -1410~3505

So I’m curious. Why Results are different.
Can i convert HU to pixel value??

2

Rescale slope and intercept values are used to compute displayed values (in HU) from raw pixel values.