Issue with unexpected changes in "save to" import converter files

cvgjvcnbv · Dec 18th 2023

I have an issue with images saved using a "save to" import converter.

I have DICOM image analysis written in python. If I run it on the DICOM image saved by conquest to its default storage location (MAGDevice0), it runs fine. If I try to run it on the .dcm file saved using an import converter, it fails.

Looking at the DICOM tags of the two files, it appears the one saved by the import converter has had the private tags re-written, so I'm wondering if this is what causes my software to fail, possibly there are other changes I'm not aware of.

Is it possible to stop the import converter file being changed, so that it is identical to the file saved in conquests database (and the original file!)?

Many thanks for any help and the extremely useful software!

The relevant lines for the import converters are:

Code

#Create a folder with SOP instance UID
ImportConverter1         = mkdir E:\auto_QC\%o\
#Save file to created folder with file base name
ImportConverter2         = save to E:\auto_QC\%o\%b.dcm

Some of the private tags from the file saved to MAGDevice0:

Code

(0009, 1001) [Unknown]                           SH: 'GEMS_GENIE'
(0009, 1010) [Study Name]                        LO: 'QC-protocol'
(0009, 1011) [Study Flags]                       SL: 1
(0009, 1012) [Study Type]                        SL: 0
(0009, 101e) [Dataset UID]                       UI: ''
(0009, 1020) [Series Object Name]                LO: 'ImageQC'
(0009, 1021) [Series Flags]                      SL: 1
(0009, 1022) [User Orientation]                  SH: ''
(0009, 1023) [Initiation Type]                   SL: 0
(0009, 1024) [Initiation Delay]                  SL: 0
(0009, 1025) [Initiation Count Rate]             SL: 0
(0009, 1026) [Number Energy Sets]                SL: 1
(0009, 1027) [Number Detectors]                  SL: 2
(0009, 1028) [Number RR Windows]                 SL: 0
(0009, 1029) [Number MG Time Slots]              SL: 0
(0009, 102a) [Number View Sets]                  SL: 0
(0009, 102b) [Trigger History UID]               LO: ''
(0009, 102c) [Series Comments]                   LO: ''
(0009, 102e) [Distance Prescribed]               FD: 0.0
(0009, 102f) [Table Direction]                   SL: 0
(0009, 1040) [Patient Object Name]               PN: 'operator^^^^'

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Tags from the same image, but saved using "save to" import converter

Code

(0009, 1001) Private tag data                    UN: b'GEMS_GENIE'
(0009, 1010) Private tag data                    UN: b'QC-protocol '
(0009, 1011) Private tag data                    UN: b'\x01\x00\x00\x00'
(0009, 1012) Private tag data                    UN: b'\x00\x00\x00\x00'
(0009, 101e) Private tag data                    UN: None
(0009, 1020) Private tag data                    UN: b'ImageQC '
(0009, 1021) Private tag data                    UN: b'\x01\x00\x00\x00'
(0009, 1022) Private tag data                    UN: None
(0009, 1023) Private tag data                    UN: b'\x00\x00\x00\x00'
(0009, 1024) Private tag data                    UN: b'\x00\x00\x00\x00'
(0009, 1025) Private tag data                    UN: b'\x00\x00\x00\x00'
(0009, 1026) Private tag data                    UN: b'\x01\x00\x00\x00'
(0009, 1027) Private tag data                    UN: b'\x02\x00\x00\x00'
(0009, 1028) Private tag data                    UN: b'\x00\x00\x00\x00'
(0009, 1029) Private tag data                    UN: b'\x00\x00\x00\x00'
(0009, 102a) Private tag data                    UN: b'\x00\x00\x00\x00'
(0009, 102b) Private tag data                    UN: None
(0009, 102c) Private tag data                    UN: None
(0009, 102e) Private tag data                    UN: b'\x00\x00\x00\x00\x00\x00\x00\x00'
(0009, 102f) Private tag data                    UN: b'\x00\x00\x00\x00'
(0009, 1040) Private tag data                    UN: b'operator^^^^'

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cvgjvcnbv · Dec 18th 2023

I think this happens to images exported through the GUI too ("export to ZIP file")

marcelvanherk · Dec 23rd 2023

Hi,

can you post your dicom.ini file for completeness?

Reading the code the difference is not obvious.

Marcel

cvgjvcnbv · Jan 2nd 2024

Thank you, dicom.ini is as follows:

Code

[sscscp]
MicroPACS                = sscscp


# Network configuration: server name and TCP/IP port#
MyACRNema                = CHTQATRACKNM
TCPPort                  = 5678


# Host, database, username and password for database
SQLHost                  = localhost
SQLServer                = E:\dicomserver\Data\dbase\conquest.db3
Username                 =
Password                 =
SqLite                   = 1
DoubleBackSlashToDB      = 0
UseEscapeStringConstants = 0


# Configure server
ImportExportDragAndDrop  = 1
ZipTime                  = 05:
UIDPrefix                = 1.2.826.0.1.3680043.2.135.738802.46981536
EnableComputedFields     = 1


FileNameSyntax           = 4


# Configuration of compression for incoming images and archival
DroppedFileCompression   = un
IncomingCompression      = un
ArchiveCompression       = as


# For debug information
PACSName                 = CHTQATRACKNM
OperatorConsole          = 127.0.0.1
DebugLevel               = 0


# Configuration of disk(s) to store images
MAGDeviceFullThreshold  = 30
MAGDevices               = 1
MAGDevice0               = E:\dicomserver\Data\


#Configuration for QATrack+
#Reject patient images (send error to sender)
ImportConverter0         = ifequal "%i[0,2]", "RBV"; reject
#Create a folder with SOP instance UID
ImportConverter1         = mkdir E:\auto_QC\%V0020,000E\
#Save file to created folder with file base name
ImportConverter2         = save to E:\auto_QC\%V0020,000E\%b.dcm
#Execute QAT+ script to analyse
ImportConverter3         = process series after 30 by E:\deploy\venvs\qatrack31\Scripts\Activate.bat && python E:\auto_QC\auto_dicom_qc.py E:\auto_QC\%V0020,000E
#Don't store within conquest
ImportConverter4         = destroy

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Basically it seems to be rewriting the private tags, changing the value representation and storing the values as binary?

marcelvanherk · Jan 3rd 2024

Hi,

I think the issue may in be in the internal dicomcopy function. I will have a look.

Marcel

cvgjvcnbv · Jan 3rd 2024

Ok great, thank you

marcelvanherk · Jan 3rd 2024

Hi,

a fix has been put onto github:

https://github.com/marcelvanherk/Conquest-DICOM-Server

Just copy the new dgate.exe and dgate64.exe into your conquest folder

Let me know if you have success!

Marcel

cvgjvcnbv · Jan 4th 2024

Yes it's working now, I can see the tags are unchanged, thank you very much that's brilliant!

Issue with unexpected changes in "save to" import converter files

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