When dicomdump reads a DICOM series, sometimes an attribute is only present for some files in the series. In the specific case where the attribute is missing for the first image in the series, but present for some other images, dicomdump will report the VR as an empty string.
This can be seen with the "InConcatenationNumber" attribute of the series CT0071 CT0072 CT0073 CT0074_* in the DICOM multiframe data collection, since only CT0074_* have this attribute.
VR mismatch! != US InConcatenationNumber
(0020,9162) "InConcatenationNumber" : (multiple values)
0001 [] (0 bytes) - from CT0071
0002 [1] (2 bytes) - from CT0074_1
0003 [2] (2 bytes) - from CT0074_2
0004 [3] (2 bytes) - from CT0074_3
0005 [4] (2 bytes) - from CT0074_4
0006 [5] (2 bytes) - from CT0074_5
0007 [6] (2 bytes) - from CT0074_6
0008 [] (0 bytes) - from CT0072
0009 [] (0 bytes) - from CT0073
Of course this series also has the problem that CT0074_1 through CT0074_6 all have an InstanceNumber of 1. Furthermore, I'm not certain they were meant to be part of the same series as CT0071 CT0072 CT0073. Notwithstanding the irregularity of the data, we still want dicomdump to report the VR correctly.
A related issue is that dicomdump reports missing attributes as empty. It has no syntax to denote that an attribute is missing from an image within a series.
dgobbi
commented
4 years ago
When dicomdump reads a DICOM series, sometimes an attribute is only present for some files in the series. In the specific case where the attribute is missing for the first image in the series, but present for some other images, dicomdump will report the VR as an empty string.
This can be seen with the "InConcatenationNumber" attribute of the series CT0071 CT0072 CT0073 CT0074_* in the DICOM multiframe data collection, since only CT0074_* have this attribute.
Of course this series also has the problem that CT0074_1 through CT0074_6 all have an InstanceNumber of 1. Furthermore, I'm not certain they were meant to be part of the same series as CT0071 CT0072 CT0073. Notwithstanding the irregularity of the data, we still want dicomdump to report the VR correctly.
A related issue is that dicomdump reports missing attributes as empty. It has no syntax to denote that an attribute is missing from an image within a series.