Delete an element

Erik Virtel · September 26, 2025 at 1:40 PM Official Post

Quote

Hi Marcel,
Hoping you can help me with a puzzle. I'm trying to use CQ to:
1. Ingest a mammography study
2. Delete (empty) 0054,0222 and all its sub-tags.

(0054,0222) ViewAngulationModifierCode... SQ # 78 1
[
(0008,0100) CodeValue SH # 8 1 [R-102D5 ]
(0008,0102) CodingSchemeDesignator SH # 4 1 [SRT ]
(0008,0104) CodeMeaning LO # 18 1 [Implant Displaced ]

I'm using the importconverter to call the script:

function ImportConverter(script)
-- Delete the sequence tag (0054,0222)
script:DeleteElement(0054,0222)
end

It's working reliably for the 2D mamm images, but not the 3D. Any thoughts on how I could try this differently?

Jeff

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Marcel wrote:

Quote

Hi,

the code for element deletion may be faulty for sequences.
I found these commands work to empty a (different) sequence:
Data.DeidentificationMethodCodeSequence=nil
Data.DeidentificationMethodCodeSequence={}
It is unclear to me why there would be difference between 2D and 3D mammo images though.

Marcel

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Marcel wrote:

Quote

DeleteElement does not exist I think? There is DeleteFromSequence, or setting an element to nil.

Erik Virtel · September 26, 2025 at 1:43 PM Official Post

jahrendsen and marcelvanherk

Sorry guys, I had to copy your thread from yesterday evening due to the forum migration, which we finished with a little delay.

marcelvanherk · September 26, 2025 at 2:20 PM

No worries!

New look seems nice!

Marcel

jahrendsen · September 29, 2025 at 6:39 PM

No luck Marcel. I'm not getting any errors, but the sequence values still aren't being removed. Does it matter if it's nested within another sequence? I'm being asked to remove the "ViewModifierCodeSequence" elements.

(0054,0220) SQ (empty) # 0 ViewCodeSequence
(0008,0000) UL 50 # 4 IdentifyingGroupLength
(0008,0100) SH [R-10242 ] # 8 CodeValue
(0008,0102) SH [SRT ] # 4 CodingSchemeDesignator
(0008,0104) LO [cranio-caudal ] # 14 CodeMeaning
(0054,0000) UL 106 # 4 NuclearAcquisitionGroupLength
(0054,0222) SQ (empty) # 0 ViewModifierCodeSequence
(0008,0000) UL 54 # 4 IdentifyingGroupLength
(0008,0100) SH [R-102D5 ] # 8 CodeValue
(0008,0102) SH [SRT ] # 4 CodingSchemeDesignator
(0008,0104) LO [Implant Displaced ] # 18 CodeMeaning

marcelvanherk · September 29, 2025 at 6:41 PM

Can you share a sample?

jahrendsen · September 29, 2025 at 7:12 PM

Being a 3D MG, the file size goes way beyond the attachment limits. I have anonymized the series, so I'm not concerned about HIPAA if you have another method to get you the sample.

marcelvanherk · September 29, 2025 at 7:35 PM

You can maybe compress it with conquest into k8 (128x128 pixels).

Marcel

jahrendsen · September 29, 2025 at 8:23 PM

Hmm, I can't seem to compress it any further than what it already is. Here's the export converter I used.

ExportConverter0 = forward compressed as k8 to CONQUESTSRV3

It's still 256MB

marcelvanherk · September 29, 2025 at 8:28 PM

Can you put in on your google drive and send me a share link?

jahrendsen · September 29, 2025 at 9:04 PM

I can do that. What's your email address?

jahrendsen · September 29, 2025 at 9:05 PM

actually, i can copy a link here.

1.2.826.0.1.3680043.2.135.737552.32222921.7.1759165680.515.1.dcm

jahrendsen · September 29, 2025 at 9:07 PM

I may need to email you the link. That way I can ensure you have access.

marcelvanherk · September 29, 2025 at 9:30 PM

vanherkmarcel@gmail.com

jahrendsen · September 29, 2025 at 9:44 PM

sent.

marcelvanherk · September 29, 2025 at 10:09 PM

Ah, the element is a sequence in a sequence, therefore say:

Data.ViewCodeSequence[0].ViewModifierCodeSequence = nil

or

for i=0, #Data.ViewCodeSequence-1 do Data.ViewCodeSequence[i].ViewModifierCodeSequence = nil end

Marcel

jahrendsen · September 29, 2025 at 10:26 PM

Yep, that did it. Thanks!

Participate now!