dcm-anon

WORK IN PROGRESS

Custom Dicom anonymizer that plays nicely with:

• FreeSurfer
• thinq/rethinq
• AutoRegsiter

Tags required for FreeSurfer recons (scanner manufacturer, etc) are left untouched

Tags required for thinq/rethinq recons (age, sex, scanner manufactuer, feild stregth) are left untouched.

PatientID tag is anonymized with a one-to-one map so that autoregister queries will work

Can be used with corticometrics/cstore-relay to anonymize DICOMS "in transit"

Usage

./dcm-anon in-dir out-dir

Anonimization procedure

The following tags are replaced with their md5sum hash:

• 0008,0080: InstitutionName
• 0008,0081: InstitutionAddress
• 0008,1030: StudyDescription
• 0008,1070: OperatorsName
• 0010,0010: PatientName
• 0010,0020: PatientID
• 0032,1060: RequestedProcedureDescription
• 0040,0254: PerformedProcedureStepDescription

An arbitrary datestring, 19991231, is generated. It is used to overwrite the datesetings in the following tags:

• 0010,0030 PatientBirthDate
• 0008,0012 InstanceCreationDate
• 0008,0020 StudyDate
• 0008,0021 SeriesDate
• 0008,0022 AcquisitionDate
• 0008,0023 ContentDate
• 0040,0244 PerformedProcedureStepStartDate

If the original InstanceCreationDate is found embedded in the following tags, it is also replaced with 19991231.

• 0008,0018 SOPInstanceUID
• 0029,1009 CSAImageHeaderVersion
• 0029,1019 CSASeriesHeaderVersion
• 0040,0253 PerformedProcedureStepID
• 0020,000e SeriesInstanceUID
• 0020,0052 FrameOfReferenceUID
• 0008,1140 ReferencedImageSequence
• 0002,0003 MediaStorageSOPInstanceUID

If the filename contains the datesting, that is replaced with 19991231 in the output filename as well.

Acknowledgments

This work has been partially funded by the following NIH grants:

• R42CA183150
• R42AG062026