# Signed vs. unsigned pixel data in DICOMAppHelper

**URL:** https://discourse.vtk.org/t/signed-vs-unsigned-pixel-data-in-dicomapphelper/955
**Category:** Development
**Created:** [May 13, 2019, 5:23pm UTC](https://discourse.vtk.org/t/signed-vs-unsigned-pixel-data-in-dicomapphelper/955 "2019-05-13T17:23:19Z")
**Posts on this page:** 1
**Showing post:** 6

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### Author: ![lassoan](https://discourse.vtk.org/user_avatar/discourse.vtk.org/lassoan/32/50_2.png) [@lassoan](https://discourse.vtk.org/u/lassoan)
#### Post date: [May 14, 2019, 6:30pm UTC](https://discourse.vtk.org/t/signed-vs-unsigned-pixel-data-in-dicomapphelper/955/6 "2019-05-14T18:30:15Z")

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There is a bug in VTK-8.2 in remote file parsing. You need to use latest VTK or backport the [very simple fix](https://github.com/Kitware/VTK/commit/bac4590ee8073532088076d8ce9d9775e9fbf2f8).

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_[View the full topic](https://discourse.vtk.org/t/signed-vs-unsigned-pixel-data-in-dicomapphelper/955)._