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Overview

Updated: 30 July, 2017



Excerpt
Following industry best-practices, TCIA uses a standards-based approach to de-identification of DICOM images to insure that images are free of protected health information (PHI).  The TCIA de-identification process ensures that the HIPAA de-identification standard is met by following the Safe Harbor Method as defined in section 164.514(b)(2) of the HIPPA Privacy Rule. The standard for de-identification of DICOM objects is defined by the DICOM Standard PS 3.15-2011 Digital Imaging and Communications in Medicine (DICOM), Part 15: Security and System Management Profiles (ftp://medical.nema.org/medical/dicom/2016b/output/html/part15.html#chapter_E). At the submitting site, a DICOM PS 3.15 compliant script removes or modifies DICOM tags deemed to be unsafe (See table 1 for a complete listing). TCIA incorporates the “Basic Application Confidentiality Profile” which is amended by inclusion of the following profile options: Clean Pixel Data Option, Clean Descriptors Option, Retain Longitudinal With Modified Dates Option, Retain Patient Characteristics Option, Retain Device Identity Option, and Retain Safe Private Option.  The de-identification rules applied to each object are recorded by TCIA in the DICOM sequence Method Code Sequence [0012,0063] by entering the Code Value, Coding Scheme Designator, and Code Meaning for each profile and option that were applied to the DICOM object during de-identification. The DICOM standard for de-identification of objects defines a minimum set of elements to de-identify to be in compliance with the standard. It is up to the user doing the de-identification to insure that PHI is removed or cleaned according to the laws and practices in place at the time de-identification occurs.

...

The following table details the de-identification performed at the submitting site by way of a TCIA supplied de-identification script.

Table 1

Tag

Name

Action

00080050

AccessionNumber

hash

00184000

AcquisitionComments

keep

00400555

AcquisitionContextSeq

remove

00080022

AcquisitionDate

incrementdate

0008002a

AcquisitionDatetime

incrementdate

00181400

AcquisitionDeviceProcessingDescription

keep

00189424

AcquisitionProtocolDescription

keep

00080032

AcquisitionTime

keep

00404035

ActualHumanPerformersSequence

remove

001021b0

AdditionalPatientHistory

keep

00380010

AdmissionID

remove

00380020

AdmittingDate

incrementdate

00081084

AdmittingDiagnosesCodeSeq

keep

00081080

AdmittingDiagnosesDescription

keep

00380021

AdmittingTime

keep

00102110

Allergies

keep

40000010

Arbitrary

remove

0040a078

AuthorObserverSequence

remove

00130010

BlockOwner

CTP

00180015

BodyPartExamined

BODYPART

00101081

BranchOfService

remove

00280301

BurnedInAnnotation

keep

00181007

CassetteID

keep

00400280

CommentsOnPPS

keep

00209161

ConcatenationUID

hashuid

00403001

ConfidentialityPatientData

remove

00700086

ContentCreatorsIdCodeSeq

remove

00700084

ContentCreatorsName

empty

00080023

ContentDate

incrementdate

0040a730

ContentSeq

remove

00080033

ContentTime

keep

0008010d

ContextGroupExtensionCreatorUID

hashuid

00180010

ContrastBolusAgent

keep

0018a003

ContributionDescription

keep

00102150

CountryOfResidence

remove

00089123

CreatorVersionUID

hashuid

00380300

CurrentPatientLocation

remove

00080025

CurveDate

incrementdate

Group

curves

remove

00080035

CurveTime

keep

0040a07c

CustodialOrganizationSeq

remove

fffcfffc

DataSetTrailingPadding

remove

00181200

DateofLastCalibration

incrementdate

0018700c

DateofLastDetectorCalibration

incrementdate

00181012

DateOfSecondaryCapture

incrementdate

00120063

DeIdentificationMethod

{Per DICOM PS 3.15 AnnexE. Details in 0012,0064}

00120064

DeIdentificationMethodCodeSequence

113100/113101/113105/113107/113108/113109/113111

00082111

DerivationDescription

keep

0018700a

DetectorID

keep

00181000

DeviceSerialNumber

keep

00181002

DeviceUID

keep

fffafffa

DigitalSignaturesSeq

remove

04000100

DigitalSignatureUID

remove

00209164

DimensionOrganizationUID

hashuid

00380040

DischargeDiagnosisDescription

keep

4008011a

DistributionAddress

remove

40080119

DistributionName

remove

300a0013

DoseReferenceUID

hashuid

00102160

EthnicGroup

keep

00080058

FailedSOPInstanceUIDList

hashuid

0070031a

FiducialUID

hashuid

00402017

FillerOrderNumber

empty

00209158

FrameComments

keep

00200052

FrameOfReferenceUID

hashuid

00181008

GantryID

keep

00181005

GeneratorID

keep

00700001

GraphicAnnotationSequence

remove

00404037

HumanPerformersName

remove

00404036

HumanPerformersOrganization

remove

00880200

IconImageSequence

remove

00084000

IdentifyingComments

keep

00204000

ImageComments

keep

00284000

ImagePresentationComments

remove

00402400

ImagingServiceRequestComments

keep

40080300

Impressions

keep

00080012

InstanceCreationDate

incrementdate

00080014

InstanceCreatorUID

hashuid

00080081

InstitutionAddress

remove

00081040

InstitutionalDepartmentName

remove

00080082

InstitutionCodeSequence

remove

00080080

InstitutionName

remove

00101050

InsurancePlanIdentification

remove

00401011

IntendedRecipientsOfResultsIDSequence

remove

40080111

InterpretationApproverSequence

remove

4008010c

InterpretationAuthor

remove

40080115

InterpretationDiagnosisDescription

keep

40080202

InterpretationIdIssuer

remove

40080102

InterpretationRecorder

remove

4008010b

InterpretationText

keep

4008010a

InterpretationTranscriber

remove

00083010

IrradiationEventUID

hashuid

00380011

IssuerOfAdmissionID

remove

00100021

IssuerOfPatientID

remove

00380061

IssuerOfServiceEpisodeId

remove

00281214

LargePaletteColorLUTUid

hashuid

001021d0

LastMenstrualDate

incrementdate

00280303

LongitudinalTemporalInformationModified

MODIFIED

04000404

MAC

remove

00080070

Manufacturer

keep

00081090

ManufacturerModelName

keep

00102000

MedicalAlerts

keep

00101090

MedicalRecordLocator

remove

00101080

MilitaryRank

remove

04000550

ModifiedAttributesSequence

remove

00203406

ModifiedImageDescription

remove

00203401

ModifyingDeviceID

remove

00203404

ModifyingDeviceManufacturer

remove

00081060

NameOfPhysicianReadingStudy

remove

00401010

NamesOfIntendedRecipientsOfResults

remove

00102180

Occupation

keep

00081070

OperatorName

remove

00081072

OperatorsIdentificationSeq

remove

00402010

OrderCallbackPhoneNumber

remove

00402008

OrderEnteredBy

remove

00402009

OrderEntererLocation

remove

04000561

OriginalAttributesSequence

remove

00101000

OtherPatientIDs

remove

00101002

OtherPatientIDsSeq

remove

00101001

OtherPatientNames

remove

00080024

OverlayDate

incrementdate

Group

overlays

remove

00080034

OverlayTime

keep

00281199

PaletteColorLUTUID

hashuid

0040a07a

ParticipantSequence

remove

00101040

PatientAddress

remove

00101010

PatientAge

keep

00100030

PatientBirthDate

empty

00101005

PatientBirthName

remove

00100032

PatientBirthTime

remove

00104000

PatientComments

keep

00100020

PatientID

Re-Mapped

00120062

PatientIdentityRemoved

YES

00380400

PatientInstitutionResidence

remove

00100050

PatientInsurancePlanCodeSeq

remove

00101060

PatientMotherBirthName

remove

00100010

PatientName

Re-Mapped

00102154

PatientPhoneNumbers

remove

00100101

PatientPrimaryLanguageCodeSeq

remove

00100102

PatientPrimaryLanguageModifierCodeSeq

remove

001021f0

PatientReligiousPreference

remove

00100040

PatientSex

keep

00102203

PatientSexNeutered

keep

00101020

PatientSize

keep

00380500

PatientState

keep

00401004

PatientTransportArrangements

remove

00101030

PatientWeight

keep

00400243

PerformedLocation

remove

00400241

PerformedStationAET

keep

00404030

PerformedStationGeoLocCodeSeq

keep

00400242

PerformedStationName

keep

00404028

PerformedStationNameCodeSeq

keep

00081052

PerformingPhysicianIdSeq

remove

00081050

PerformingPhysicianName

remove

00400250

PerformProcedureStepEndDate

incrementdate

00401102

PersonAddress

remove

00401101

PersonIdCodeSequence

remove

0040a123

PersonName

empty

00401103

PersonTelephoneNumbers

remove

40080114

PhysicianApprovingInterpretation

remove

00081048

PhysicianOfRecord

remove

00081049

PhysicianOfRecordIdSeq

remove

00081062

PhysicianReadingStudyIdSeq

remove

00402016

PlaceOrderNumberOfImagingServiceReq

empty

00181004

PlateID

keep

00400254

PPSDescription

keep

00400253

PPSID

remove

00400244

PPSStartDate

incrementdate

00400245

PPSStartTime

keep

001021c0

PregnancyStatus

keep

00400012

PreMedication

keep

Group

privategroups

keep

00131010

ProjectName

always

00181030

ProtocolName

keep

00540016

Radiopharmaceutical Information Sequence

process

00181078

Radiopharmaceutical Start DateTime

incrementdate

00181079

Radiopharmaceutical Stop DateTime

incrementdate

00402001

ReasonForImagingServiceRequest

keep

00321030

ReasonforStudy

keep

04000402

RefDigitalSignatureSeq

remove

30060024

ReferencedFrameOfReferenceUID

hashuid

00380004

ReferencedPatientAliasSeq

remove

00080092

ReferringPhysicianAddress

remove

00080090

ReferringPhysicianName

empty

00080094

ReferringPhysicianPhoneNumbers

remove

00080096

ReferringPhysiciansIDSeq

remove

00404023

RefGenPurposeSchedProcStepTransUID

hashuid

00081140

RefImageSeq

remove

00081120

RefPatientSeq

remove

00081111

RefPPSSeq

remove

00081150

RefSOPClassUID

keep

04000403

RefSOPInstanceMACSeq

remove

00081155

RefSOPInstanceUID

hashuid

00081110

RefStudySeq

remove

00102152

RegionOfResidence

remove

300600c2

RelatedFrameOfReferenceUID

hashuid

00400275

RequestAttributesSeq

remove

00321070

RequestedContrastAgent

keep

00401400

RequestedProcedureComments

keep

00321060

RequestedProcedureDescription

keep

00401001

RequestedProcedureID

remove

00401005

RequestedProcedureLocation

remove

00321032

RequestingPhysician

remove

00321033

RequestingService

remove

00102299

ResponsibleOrganization

remove

00102297

ResponsiblePerson

remove

40084000

ResultComments

keep

40080118

ResultsDistributionListSeq

remove

40080042

ResultsIDIssuer

remove

300e0008

ReviewerName

remove

00404034

ScheduledHumanPerformersSeq

remove

0038001e

ScheduledPatientInstitutionResidence

remove

0040000b

ScheduledPerformingPhysicianIDSeq

remove

00400006

ScheduledPerformingPhysicianName

remove

00400001

ScheduledStationAET

keep

00404027

ScheduledStationGeographicLocCodeSeq

keep

00400010

ScheduledStationName

keep

00404025

ScheduledStationNameCodeSeq

keep

00321020

ScheduledStudyLocation

keep

00321021

ScheduledStudyLocationAET

keep

00321000

ScheduledStudyStartDate

incrementdate

00080021

SeriesDate

incrementdate

0008103e

SeriesDescription

keep

0020000e

SeriesInstanceUID

hashuid

00080031

SeriesTime

keep

00380062

ServiceEpisodeDescription

keep

00380060

ServiceEpisodeID

remove

00131013

SiteID

SITEID

00131012

SiteName

SITENAME

001021a0

SmokingStatus

keep

00181020

SoftwareVersion

keep

00080018

SOPInstanceUID

hashuid

00082112

SourceImageSeq

remove

00380050

SpecialNeeds

keep

00400007

SPSDescription

keep

00400004

SPSEndDate

incrementdate

00400005

SPSEndTime

keep

00400011

SPSLocation

keep

00400002

SPSStartDate

incrementdate

00400003

SPSStartTime

keep

00081010

StationName

remove

00880140

StorageMediaFilesetUID

hashuid

30060008

StructureSetDate

incrementdate

00321040

StudyArrivalDate

incrementdate

00324000

StudyComments

keep

00321050

StudyCompletionDate

incrementdate

00080020

StudyDate

incrementdate

00081030

StudyDescription

keep

00200010

StudyID

empty

00320012

StudyIDIssuer

remove

0020000d

StudyInstanceUID

hashuid

00080030

StudyTime

keep

00200200

SynchronizationFrameOfReferenceUID

hashuid

0040db0d

TemplateExtensionCreatorUID

hashuid

0040db0c

TemplateExtensionOrganizationUID

hashuid

40004000

TextComments

remove

20300020

TextString

remove

00080201

TimezoneOffsetFromUTC

remove

00880910

TopicAuthor

remove

00880912

TopicKeyWords

remove

00880906

TopicSubject

remove

00880904

TopicTitle

remove

00081195

TransactionUID

hashuid

00131011

TrialName

PROJECTNAME

0040a124

UID

hashuid

Group

unspecifiedelements

keep

0040a088

VerifyingObserverIdentificationCodeSeq

remove

0040a075

VerifyingObserverName

empty

0040a073

VerifyingObserverSequence

remove

0040a027

VerifyingOrganization

remove

00384000

VisitComments

keep


More Details regarding TCIA de-identification may be found at the following links: De-Identification Rules.