ENH: document bug

diff --git a/TheralysGDCM120Bug.README.txt b/TheralysGDCM120Bug.README.txt
new file mode 100644 (file)
index 0000000..ad2edfd
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+++ b/TheralysGDCM120Bug.README.txt
@@ -0,0 +1,29 @@
+This image can only be read with an early gdcm 1.2.0 version. It is fairly difficult to re-read since it suffer from two bugs at the same time:
+
+1. VR=UN fields have their Value Length encoded on 2 bytes instead of 4
+2. within a SQ some private tag, are encoded as implicit (should be explicit)
+
+For instance:
+
+S 0008|1110 [SQ]                                          [Referenced Study Sequence]
+   |  --- SQItem number 0
+   | V fffe|e000 [UL]                                                               [Item]
+   | V 0008|1150 [UI]                                           [Referenced SOP Class UID] [1.2.840.10008.3.1.2.3.1 ]  ==>      [Detached Study Management SOP Class]
+   | V 0008|1155 [UI]                                        [Referenced SOP Instance UID] [1.2.826.0.1.2112370.8.1.31823827]
+   | V fffe|e00d [UL]                                             [Item Delimitation Item]
+   |  ---
+   | V fffe|e0dd [UL]                                         [Sequence Delimitation Item]
+S 0008|1111 [SQ]                       [Referenced Performed Procedure Step Sequence]
+   |  --- SQItem number 0
+   | V fffe|e000 [UL]                                                               [Item]
+   | V 0008|0005 [CS]                                             [Specific Character Set] []
+   | V 0008|0012 [DA]                                             [Instance Creation Date] [20061020]
+   | V 0008|0013 [TM]                                             [Instance Creation Time] [153950]
+   | V 0008|0014 [UI]                                               [Instance Creator UID] [1.3.46.670589.11.8576.5 ]
+   | V 0008|1150 [UI]                                           [Referenced SOP Class UID] [1.2.840.10008.3.1.2.3.3 ]  ==>      [Modality Performed Procedure Step SOP Class]
+   | V 0008|1155 [UI]                                        [Referenced SOP Instance UID] [1.3.46.670589.11.0.0.11.4.2.0.8576.5.2300.2006102012350701183 ]
+   | V 0020|0013 [IS]                                                    [Instance Number] [0 ]
+   | V 2005|0014 [LO]                                                      [gdcm::Unknown] [Philips MR Imaging DD 005 ]
+   | B 2005|1406 [  ]                                                      [gdcm::Unknown] [gdcm::Binary data loaded;length = 2]
+   | V fffe|e00d [UL]                                             [Item Delimitation Item]
+