How to get invalid tags (elements)?

[narbek-abd]

Hi

We've been told that after deleting invalid tags we can upload it to pacs systems.

I tried to read it and determine which tags are invalid:

import pydicom
a = pydicom.dcmread('./1.2.392.200036.9125.4.0.2032492057.512481736.248662482')
print(a)

It gives an error:
raise NotImplementedError(f"Unknown Value Representation '{VR}'")
NotImplementedError: Unknown Value Representation '0x4d 0x02'

Is there any function to get those tags?
I tried forse=True and pydicom.config.convert_wrong_length_to_UN = True but it didn't work

[mrbean-bremen]

I don't think this is recoverable. Here is the output of dcmdump:

dcmdump 1.2.392.200036.9125.4.0.2032492057.512481736.248662482
W: DcmItem: Non-standard VR '? ' (3f\00) encountered while parsing element (a552,0000), assuming 2 byte length field
W: DcmItem: Non-standard VR '< ' (3c\09) encountered while parsing element (0010,0b94), assuming 2 byte length field
W: DcmItem: Length of element (0010,0b94) is odd
W: DcmItem: Dataset not in ascending tag order, at element (0010,0b94)
W: DcmItem: Non-standard VR 'óu' (a2\75) encountered while parsing element (0000,f300), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (0000,f300)
W: DcmItem: Non-standard VR '24' (32\34) encountered while parsing element (3337,2e36), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (3337,2e36)
W: DcmItem: Non-standard VR 'L ' (4c\04) encountered while parsing element (0000,5500), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (0000,5500)
W: DcmItem: Non-standard VR '½+' (ab\2b) encountered while parsing element (97b7,9937), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (97b7,9937)
W: DcmItem: Non-standard VR '= ' (3d\12) encountered while parsing element (8b30,10d2), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (8b30,10d2)
W: DcmItem: Non-standard VR ' á' (20\a0) encountered while parsing element (44ee,d197), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (44ee,d197)
W: DcmItem: Non-standard VR '/H' (2f\48) encountered while parsing element (a5f4,7220), assuming 2 byte length field
W: DcmItem: Non-standard VR '­ ' (f0\08) encountered while parsing element (8c45,12c0), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (8c45,12c0)
W: DcmItem: Non-standard VR '$▓' (24\b2) encountered while parsing element (4266,de3b), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (4266,de3b)
W: DcmItem: Non-standard VR '.G' (2e\47) encountered while parsing element (5784,7414), assuming 2 byte length field
W: DcmItem: Length of element (5784,7414) is odd
W: DcmItem: Dataset not in ascending tag order, at element (5784,7414)
W: DcmItem: Non-standard VR 'EÙ' (45\eb) encountered while parsing element (6569,58e4), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (6569,58e4)
W: DcmItem: Non-standard VR 'üÛ' (81\ea) encountered while parsing element (1720,d390), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (1720,d390)
W: DcmItem: Non-standard VR '0Ç' (30\80) encountered while parsing element (993c,8407), assuming 2 byte length field
W: DcmItem: Length of element (993c,8407) is odd
W: DcmItem: Dataset not in ascending tag order, at element (993c,8407)
W: DcmItem: Non-standard VR 'Ð`' (d1\60) encountered while parsing element (d656,73d6), assuming 2 byte length field
W: DcmItem: Non-standard VR '?@' (3f\40) encountered while parsing element (6464,08b6), assuming 2 byte length field
W: DcmItem: Length of element (6464,08b6) is odd
W: DcmItem: Dataset not in ascending tag order, at element (6464,08b6)
W: DcmItem: Non-standard VR ' ,' (1c\2c) encountered while parsing element (a1c2,8800), assuming 2 byte length field
W: DcmItem: Length of element (a1c2,8800) is odd
W: DcmItem: Dataset not in ascending tag order, at element (a1c2,8800)
W: DcmItem: Non-standard VR 'íÿ' (a1\98) encountered while parsing element (7d48,ac17), assuming 2 byte length field
W: DcmItem: Length of element (7d48,ac17) is odd
W: DcmItem: Dataset not in ascending tag order, at element (7d48,ac17)
W: DcmItem: Non-standard VR 'v ' (76\0a) encountered while parsing element (9475,2f49), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (9475,2f49)
W: DcmItem: Non-standard VR 'E ' (45\01) encountered while parsing element (f076,00da), assuming 2 byte length field
W: DcmItem: Length of element (f076,00da) is odd
W: DcmItem: Non-standard VR 'ýZ' (ec\5a) encountered while parsing element (0459,03ac), assuming 2 byte length field
W: DcmItem: Length of element (0459,03ac) is odd
W: DcmItem: Dataset not in ascending tag order, at element (0459,03ac)
W: DcmItem: Non-standard VR 'h ' (68\04) encountered while parsing element (a424,c168), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (a424,c168)
W: DcmItem: Non-standard VR 'Óü' (e0\81) encountered while parsing element (4c9e,1d25), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (4c9e,1d25)
W: DcmItem: Non-standard VR 'y ' (79\1d) encountered while parsing element (2f42,5194), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (2f42,5194)
W: DcmItem: Non-standard VR 'x ' (78\02) encountered while parsing element (cac8,0f3a), assuming 2 byte length field
W: DcmItem: Length of element (cac8,0f3a) is odd
W: DcmItem: Dataset not in ascending tag order, at element (cac8,0f3a)
W: DcmItem: Non-standard VR 'ÂX' (b6\58) encountered while parsing element (1399,a5eb), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (1399,a5eb)
W: DcmItem: Non-standard VR 'ÅÅ' (8f\8f) encountered while parsing element (4804,9680), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (4804,9680)
W: DcmItem: Non-standard VR ' %' (16\25) encountered while parsing element (672c,ca5a), assuming 2 byte length field
W: DcmItem: Length of element (672c,ca5a) is odd
W: DcmItem: Dataset not in ascending tag order, at element (672c,ca5a)
W: DcmItem: Non-standard VR ' ï' (07\8b) encountered while parsing element (91d1,08cd), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (91d1,08cd)
W: DcmItem: Non-standard VR ' 3' (02\33) encountered while parsing element (b22b,2bfa), assuming 2 byte length field
W: DcmItem: Length of element (b22b,2bfa) is odd
W: DcmItem: Dataset not in ascending tag order, at element (b22b,2bfa)
W: DcmItem: Non-standard VR ',>' (2c\3e) encountered while parsing element (f600,89e1), assuming 2 byte length field
W: DcmItem: Non-standard VR '│í' (b3\a1) encountered while parsing element (f1bb,b724), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (f1bb,b724)
W: DcmItem: Non-standard VR 'âƒ' (83\9f) encountered while parsing element (a437,812d), assuming 2 byte length field
W: DcmItem: Length of element (a437,812d) is odd
W: DcmItem: Dataset not in ascending tag order, at element (a437,812d)
W: DcmItem: Non-standard VR 'gA' (67\41) encountered while parsing element (01bc,672f), assuming 2 byte length field
W: DcmItem: Length of element (01bc,672f) is odd
W: DcmItem: Dataset not in ascending tag order, at element (01bc,672f)
W: DcmItem: Non-standard VR 'eï' (65\8b) encountered while parsing element (0095,a623), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (0095,a623)
W: DcmItem: Non-standard VR ' ë' (12\89) encountered while parsing element (de7a,8b4a), assuming 2 byte length field
W: DcmItem: Length of element (de7a,8b4a) is odd
W: DcmItem: Dataset not in ascending tag order, at element (de7a,8b4a)
W: DcmItem: Non-standard VR '¦' (b6\dd) encountered while parsing element (335b,b028), assuming 2 byte length field
W: DcmItem: Length of element (335b,b028) is odd
W: DcmItem: Dataset not in ascending tag order, at element (335b,b028)
W: DcmItem: Non-standard VR 'þE' (e7\45) encountered while parsing element (03ee,4c97), assuming 2 byte length field
W: DcmItem: Length of element (03ee,4c97) is odd
W: DcmItem: Dataset not in ascending tag order, at element (03ee,4c97)
W: DcmItem: Non-standard VR 'ÇÃ' (80\c7) encountered while parsing element (5fc4,f245), assuming 2 byte length field
W: DcmItem: Length of element (5fc4,f245) is odd
W: DcmItem: Dataset not in ascending tag order, at element (5fc4,f245)
W: DcmItem: Non-standard VR ''s' (27\73) encountered while parsing element (95f8,3863), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (95f8,3863)
W: DcmItem: Non-standard VR ' ¹' (10\fb) encountered while parsing element (5682,5001), assuming 2 byte length field
W: DcmItem: Length of element (5682,5001) is odd
W: DcmItem: Dataset not in ascending tag order, at element (5682,5001)
W: DcmItem: Non-standard VR 'Ш' (d1\f9) encountered while parsing element (4349,a202), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (4349,a202)
W: DcmItem: Non-standard VR 'Z<' (5a\3c) encountered while parsing element (6359,034e), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (6359,034e)
W: DcmItem: Non-standard VR ' └' (0b\c0) encountered while parsing element (0028,60f6), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (0028,60f6)
W: DcmItem: Non-standard VR 'Ø ' (9d\14) encountered while parsing element (a6d0,fa3c), assuming 2 byte length field
W: DcmItem: Length of element (a6d0,fa3c) is odd
W: DcmItem: Dataset not in ascending tag order, at element (a6d0,fa3c)
W: DcmItem: Non-standard VR '¥B' (be\42) encountered while parsing element (c60b,ebda), assuming 2 byte length field
W: DcmItem: Length of element (c60b,ebda) is odd
W: DcmItem: Dataset not in ascending tag order, at element (c60b,ebda)
W: DcmItem: Non-standard VR ') ' (29\15) encountered while parsing element (5110,2e7b), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (5110,2e7b)
W: DcmItem: Non-standard VR 'R ' (52\0b) encountered while parsing element (3e3c,ac00), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (3e3c,ac00)
W: DcmItem: Non-standard VR '/þ' (2f\e7) encountered while parsing element (c225,52f2), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (c225,52f2)
W: DcmItem: Non-standard VR ' I' (1f\49) encountered while parsing element (e327,a1cf), assuming 2 byte length field
W: DcmItem: Length of element (e327,a1cf) is odd
W: DcmItem: Dataset not in ascending tag order, at element (e327,a1cf)
W: DcmItem: Non-standard VR 'K ' (4b\0f) encountered while parsing element (84b5,2c85), assuming 2 byte length field
W: DcmItem: Length of element (84b5,2c85) is odd
W: DcmItem: Dataset not in ascending tag order, at element (84b5,2c85)
W: DcmItem: Non-standard VR 'Pû' (50\96) encountered while parsing element (6b9d,e13a), assuming 2 byte length field
W: DcmItem: Dataset not in ascending tag order, at element (6b9d,e13a)
W: DcmItem: Non-standard VR 'DM' (44\4d) encountered while parsing element (def3,e330), assuming 4 byte length field
W: DcmItem: Length of element (def3,e330) is odd
E: DcmElement: Unknown Tag & Data (def3,e330) larger (2040435149) than remaining bytes in file
W: DcmItem: Dataset not in ascending tag order, at element (def3,e330)
E: dcmdump: I/O suspension or premature end of stream: reading file: 1.2.392.200036.9125.4.0.2032492057.512481736.248662482

Checking it in a hex editor I can see that this is a BreastTomosynthesisImageStorage image, but it so broken that I don't think it is even worth to try to recover it. It doesn't just have a few invalid tags, but is basically unreadable.
Either the file has been corrupted somewhere on the way, or they have done some post-processing that broke the file format. I would ask the creator of the files about this, maybe they can send you the original image instead.

[narbek-abd]

Ok. Thanks

[mrbean-bremen]

Also this looks like it has not been anonymized - don't upload DICOM files that may contain personal data.

[narbek-abd]

The dicom has no real patient data. Anyway i deleted it from the question

[mrbean-bremen]

OK, I wasn't sure about that - thanks!