From d9f4b77b657cd51da676b614b30465167dca23e1 Mon Sep 17 00:00:00 2001
From: Mihail Isakov <mihail.isakov@gmail.com>
Date: Mon, 20 Dec 2021 09:01:56 +0100
Subject: [PATCH] BUG: GDCM IO: reset internal variables

It is safer to reset several variables on InternalReadImageInformation,
because a user can re-use the IO.
---
 Modules/IO/GDCM/src/itkGDCMImageIO.cxx | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/Modules/IO/GDCM/src/itkGDCMImageIO.cxx b/Modules/IO/GDCM/src/itkGDCMImageIO.cxx
index dafc19b33df..986fb8ed264 100644
--- a/Modules/IO/GDCM/src/itkGDCMImageIO.cxx
+++ b/Modules/IO/GDCM/src/itkGDCMImageIO.cxx
@@ -441,6 +441,11 @@ GDCMImageIO::Read(void * pointer)
 void
 GDCMImageIO::InternalReadImageInformation()
 {
+  // Reset, a user can re-use IO.
+  m_RescaleIntercept = 0.0;
+  m_RescaleSlope = 1.0;
+  m_SingleBit = false;
+
   // ensure file can be opened for reading, before doing any more work
   std::ifstream inputFileStream;
   // let any exceptions propagate