https://github.com/hoenikkerperez/dcm2dir
Dicom Organizer recursively scans a given root folder for DICOM files, extracts relevant metadata, and organizes the files into a structured output folder.
https://github.com/hoenikkerperez/dcm2dir
dcm dicom dicom-files dicom-images mri mri-images neuroimaging neuroscience research
Last synced: 2 months ago
JSON representation
Dicom Organizer recursively scans a given root folder for DICOM files, extracts relevant metadata, and organizes the files into a structured output folder.
- Host: GitHub
- URL: https://github.com/hoenikkerperez/dcm2dir
- Owner: HoenikkerPerez
- License: mit
- Created: 2025-03-25T09:07:37.000Z (about 1 year ago)
- Default Branch: main
- Last Pushed: 2026-03-06T09:36:42.000Z (3 months ago)
- Last Synced: 2026-03-23T00:41:14.281Z (3 months ago)
- Topics: dcm, dicom, dicom-files, dicom-images, mri, mri-images, neuroimaging, neuroscience, research
- Language: Python
- Homepage: https://pypi.org/project/dcm2dir/
- Size: 66.4 KB
- Stars: 1
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
[](https://opensource.org/licenses/MIT)
# dcm2dir
Dcm2dir recursively scans a given root folder for DICOM files, extracts relevant metadata, and organizes the files into a structured output folder.
## Description
This Python script recursively scans a given root folder for DICOM files, extracts relevant metadata, and organizes the files into a structured output folder. The folder structure is customizable using placeholders for different DICOM tags. Additionally, a CSV report is generated with details of all processed DICOM series. The tool also supports anonymizing DICOM files with a default anonymization configuration and allows providing custom anonymization actions.
## Features
- Recursively scans and organizes DICOM files.
- Supports customizable folder structures.
- Utilizes multi-threading for faster processing.
- Generates a CSV report listing all series metadata.
- Handles missing DICOM tags gracefully.
- **Anonymizes DICOM files** based on a default anonymization configuration.
## Installation
### From PyPI
Install the package directly from PyPI using `pip`:
```sh
pip install dcm2dir
```
### From Source Code
Clone the repository and install the dependencies manually:
```sh
git clone https://github.com/HoenikkerPerez/dcm2dir.git
cd dcm2dir
pip install -e .
```
## Usage
Run dcm2dir with the following command-line arguments:
```sh
dcm2dir -i -o [-r ] [-f ] [-a]
```
### Arguments:
- `-i, --input` (required): Path to the root folder containing DICOM files.
- `-o, --output` (required): Path to the destination folder where organized files will be stored.
- `-r, --report` (optional): Path to save the generated CSV report.
- `-f, --folder-structure` (optional): Custom folder structure using placeholders. See "Folder Structure" section.
- `-a, --anonymize` (optional): Enable anonymization of DICOMs.
- `-c, --custom_anon_config ` (optional): Path to the JSON file specifying anonymization rules.
### Example Usage:
```sh
dcm2dir -i ./dicoms -o ./organized -r report.csv -f "%i/%x_%t/%s_%d"
```
### Folder Structure:
The folder structure can be customized using placeholders for different DICOM tags. The following placeholders are available:
- `%a`: Antenna (coil) name
- `%b`: Basename
- `%c`: Comments
- `%d`: Description
- `%e`: Echo number
- `%f`: Folder name
- `%g`: Accession number
- `%i`: ID of patient
- `%j`: SeriesInstanceUID
- `%k`: StudyInstanceUID
- `%m`: Manufacturer
- `%n`: Name of patient
- `%o`: MediaObjectInstanceUID
- `%p`: Protocol
- `%r`: Instance number
- `%s`: Series number
- `%t`: Exam date
- `%u`: Acquisition number
- `%v`: Vendor
- `%x`: Study ID
- `%z`: Sequence name
If `-f` is not provided, the default structure is used:
```
"-f %i/%x_%t/%s_%d"
```
which corresponds to:
```
/path/to/output/
├── PatientID1/
│ ├── StudyID1_20250101/
│ │ ├── SeriesNumber1_SeriesDescription/
│ │ │ └── file1.dcm
│ │ │ └── file2.dcm
├── PatientID2/
│ ├── StudyID2_20250102/
│ │ ├── SeriesNumber2_SeriesDescription/
│ │ │ └── file3.dcm
```
## Anonymization
The `-a` or `--anonymize` flag enables anonymization of DICOM files. When this flag is provided, the tool uses a default anonymization configuration to process the DICOM files. The configuration specifies how to handle sensitive DICOM tags, such as removing or replacing their values.
### Default Anonymization Configuration
The default anonymization configuration is embedded in the tool and includes rules for handling sensitive DICOM tags. For example:
- Replace patient names and IDs with anonymized values.
- Remove sensitive metadata such as institution names and addresses.
- Retain essential metadata such as study and series UIDs.
For a detailed list of anonymization actions for specific DICOM tags, see the [Anonymization Actions Table](#anonymization-actions-table).
### Custom Anonymization Configuration
Providing a custom anonymization configuration ("-c ") allows you to specify how to handle sensitive DICOM tags. The configuration is a JSON file that maps DICOM tags to anonymization actions.
For example:
```json
{
"(0010,0010)": "C:ANONYMOUS^ANONYMOUS",
"(0010,0020)": "C:ANONYMOUS_ID",
"(0008,0020)": "K",
"(0008,0021)": "K",
"(0008,0022)": "K",
"(0008,0023)": "Z",
"(0008,0024)": "X",
"(0008,0025)": "X"
}
```
**Legend for Actions**:
- **U**: Keep the tag but ensure it is unique.
- **X**: Remove the tag entirely.
- **Z**: Replace the tag value with anonymized data.
- **D**: Clean the tag value (e.g., remove sensitive information but keep the tag).
- **C:VALUE**: Replace the tag value with a custom value.
### Example Usage with DEFAULT anonymization:
```sh
dcm2dir -i ./dicoms -o ./organized -r report.csv -f "%i/%x_%t/%s_%d" -a
```
### Example Usage with CUSTOM anonymization:
```sh
dcm2dir -i ./dicoms -o ./organized -r report.csv -f "%i/%x_%t/%s_%d" -a -c custom_anonymization_file.json
```
This command will anonymize the DICOM files and organize them into the specified folder structure.
## Output
The tool organizes DICOM files into the specified output folder following the given structure. A CSV report is saved, containing the following columns:
- SubjectID
- ExamDate
- ExamID
- SeriesID
- SeriesDescription
## Notes
- Non-alphanumeric characters in metadata are replaced with underscores.
- If a DICOM tag is missing, a default placeholder `na` is used.
- The script uses multi-threading for better performance.
- Anonymization ensures sensitive patient data is removed or replaced.
## License
This project is open-source and available under the MIT License.
## Anonymization Actions Table
The following table lists the anonymization actions for specific DICOM tags:
| **Tag** | **Description** | **Action** |
|------------------|-------------------------------------|------------------|
| `(0002-0003)` | MediaStorageSOPInstanceUID | U |
| `(0008-0014)` | InstanceCreatorUID | X |
| `(0008-0015)` | InstanceCoercionDateTime | X |
| `(0008-0018)` | SOPInstanceUID | U |
| `(0008-0020)` | StudyDate | K |
| `(0008-0021)` | SeriesDate | K |
| `(0008-0022)` | AcquisitionDate | K |
| `(0008-0023)` | ContentDate | Z |
| `(0008-0024)` | OverlayDate | X |
| `(0008-0025)` | CurveDate | X |
| `(0008-0050)` | AccessionNumber | Z |
| `(0008-0054)` | RetrieveAETitle | X |
| `(0008-0058)` | FailedSOPInstanceUIDList | U |
| `(0008-0080)` | InstitutionName | Z |
| `(0008-0081)` | InstitutionAddress | X |
| `(0008-0090)` | ReferringPhysicianName | Z |
| `(0008-0092)` | ReferringPhysicianAddress | X |
| `(0008-0094)` | ReferringPhysicianTelephoneNumbers | X |
| `(0008-0096)` | ReferringPhysicianIdentificationSequence | X |
| `(0008-0201)` | TimezoneOffsetFromUTC | X |
| `(0008-1032)` | ProcedureCodeSequence | X |
| `(0008-1040)` | InstitutionalDepartmentName | X |
| `(0008-1048)` | PhysiciansOfRecord | X |
| `(0008-1049)` | PhysiciansOfRecordIdentificationSequence | X |
| `(0008-1050)` | PerformingPhysicianName | X |
| `(0008-1052)` | PerformingPhysicianIdentificationSequence | X |
| `(0008-1060)` | NameOfPhysiciansReadingStudy | X |
| `(0008-1062)` | PhysiciansReadingStudyIdentificationSequence | X |
| `(0008-1070)` | OperatorsName | D |
| `(0008-1072)` | OperatorIdentificationSequence | D |
| `(0008-1080)` | AdmittingDiagnosesDescription | X |
| `(0008-1084)` | AdmittingDiagnosesCodeSequence | X |
| `(0008-1090)` | ManufacturerModelName | X |
| `(0008-1110)` | ReferencedStudySequence | X |
| `(0008-1120)` | ReferencedPatientSequence | X |
| `(0008-1140)` | ReferencedImageSequence | X |
| `(0008-1155)` | ReferencedSOPInstanceUID | U |
| `(0008-1195)` | TransactionUID | U |
| `(0008-2111)` | DerivationDescription | X |
| `(0008-3010)` | IrradiationEventUID | U |
| `(0008-4000)` | IdentifyingComments | X |
| `(0010-0010)` | PatientName | C:ANONYMOUS^ANONYMOUS |
| `(0010-0020)` | PatientID | C:ANONYMOUS_ID |
| `(0010-0021)` | IssuerOfPatientID | X |
| `(0010-0030)` | PatientBirthDate | Z |
| `(0010-0032)` | PatientBirthTime | X |
| `(0010-0050)` | PatientInsurancePlanCodeSequence | X |
| `(0010-0101)` | PatientPrimaryLanguageCodeSequence | X |
| `(0010-0102)` | PatientPrimaryLanguageModifierCodeSequence | X |
| `(0010-1000)` | OtherPatientIDs | X |
| `(0010-1001)` | OtherPatientNames | X |
| `(0010-1002)` | OtherPatientIDsSequence | X |
| `(0010-1005)` | PatientBirthName | X |
| `(0010-1020)` | PatientSize | X |
| `(0010-1030)` | PatientWeight | X |
| `(0010-1040)` | PatientAddress | X |
| `(0010-1050)` | InsurancePlanIdentification | X |
| `(0010-1060)` | PatientMotherBirthName | X |
| `(0010-1080)` | MilitaryRank | X |
| `(0010-1081)` | BranchOfService | X |
| `(0010-1090)` | MedicalRecordLocator | X |
| `(0010-2000)` | MedicalAlerts | X |
| `(0010-2110)` | Allergies | X |
| `(0010-2150)` | CountryOfResidence | X |
| `(0010-2152)` | RegionOfResidence | X |
| `(0010-2154)` | PatientTelephoneNumbers | X |
| `(0010-2160)` | EthnicGroup | X |
| `(0010-2180)` | Occupation | X |
| `(0010-21A0)` | SmokingStatus | X |
| `(0010-21B0)` | AdditionalPatientHistory | X |
| `(0010-21C0)` | PregnancyStatus | X |
| `(0010-21D0)` | LastMenstrualDate | X |
| `(0010-21F0)` | PatientReligiousPreference | X |
| `(0010-2203)` | PatientSexNeutered | X |
| `(0010-2297)` | ResponsiblePerson | X |
| `(0010-2299)` | ResponsibleOrganization | X |
| `(0010-4000)` | PatientComments | X |
| `(0012-0010)` | ClinicalTrialSponsorName | D |
| `(0012-0020)` | ClinicalTrialProtocolID | D |
| `(0012-0021)` | ClinicalTrialProtocolName | Z |
| `(0012-0030)` | ClinicalTrialSiteID | Z |
| `(0012-0031)` | ClinicalTrialSiteName | Z |
| `(0012-0040)` | ClinicalTrialSubjectID | D |
| `(0012-0042)` | ClinicalTrialSubjectReadingID | D |
| `(0012-0050)` | ClinicalTrialTimePointID | Z |
| `(0012-0051)` | ClinicalTrialTimePointDescription | X |
| `(0012-0060)` | ClinicalTrialCoordinatingCenterName | Z |
| `(0018-1002)` | DeviceUID | U |
| `(0018-1004)` | PlateID | X |
| `(0018-1005)` | GeneratorID | X |
| `(0018-1007)` | CassetteID | X |
| `(0018-1008)` | GantryID | X |
| `(0018-1012)` | DateOfSecondaryCapture | X |
| `(0018-1014)` | TimeOfSecondaryCapture | X |
| `(0018-1020)` | SoftwareVersions | X |
| `(0018-1042)` | ContrastBolusStartTime | X |
| `(0018-1043)` | ContrastBolusStopTime | X |
| `(0018-1072)` | RadiopharmaceuticalStartTime | X |
| `(0018-1073)` | RadiopharmaceuticalStopTime | X |
| `(0018-1200)` | DateOfLastCalibration | X |
| `(0018-1201)` | TimeOfLastCalibration | X |
| `(0018-1400)` | AcquisitionDeviceProcessingDescription | D |
| `(0018-4000)` | AcquisitionComments | X |
| `(0018-700A)` | DetectorID | X |
| `(0018-700C)` | DateOfLastDetectorCalibration | X |
| `(0018-700E)` | TimeOfLastDetectorCalibration | X |
| `(0018-9424)` | AcquisitionProtocolDescription | X |
| `(0018-A003)` | ContributionDescription | X |
| `(0020-000D)` | StudyInstanceUID | U |
| `(0020-000E)` | SeriesInstanceUID | U |
| `(0020-0010)` | StudyID | C:CUSTOM_EXAM_ID |
| `(0020-0052)` | FrameOfReferenceUID | U |
| `(0020-3401)` | ModifyingDeviceID | X |
| `(0020-3404)` | ModifyingDeviceManufacturer | X |
| `(0020-3406)` | ModifiedImageDescription | X |
| `(0020-4000)` | ImageComments | X |
| `(0020-9158)` | FrameComments | X |
| `(0020-9161)` | ConcatenationUID | U |
| `(0020-9164)` | DimensionOrganizationUID | U |
| `(0028-1199)` | PaletteColorLookupTableUID | U |
| `(0028-1214)` | LargePaletteColorLookupTableUID | U |
| `(0032-0012)` | StudyIDIssuer | X |
| `(0032-0032)` | StudyVerifiedDate | X |
| `(0032-0033)` | StudyVerifiedTime | X |
| `(0032-0034)` | StudyReadDate | X |
| `(0032-0035)` | StudyReadTime | X |
| `(0032-1000)` | ScheduledStudyStartDate | X |
| `(0032-1001)` | ScheduledStudyStartTime | X |
| `(0032-1010)` | ScheduledStudyStopDate | X |
| `(0032-1011)` | ScheduledStudyStopTime | X |
| `(0032-1020)` | ScheduledStudyLocation | X |
| `(0032-1021)` | ScheduledStudyLocationAETitle | X |
| `(0032-1030)` | ReasonForStudy | X |
| `(0032-1032)` | RequestingPhysician | X |
| `(0032-1033)` | RequestingService | X |
| `(0032-1040)` | StudyArrivalDate | X |
| `(0032-1041)` | StudyArrivalTime | X |
| `(0032-1050)` | StudyCompletionDate | X |
| `(0032-1051)` | StudyCompletionTime | X |
| `(0032-1060)` | RequestedProcedureDescription | X |
| `(0032-1070)` | RequestedContrastAgent | X |
| `(0032-4000)` | StudyComments | X |
| `(0038-0004)` | ReferencedPatientAliasSequence | X |
| `(0038-0010)` | AdmissionID | X |
| `(0038-0011)` | IssuerOfAdmissionID | X |
| `(0038-001A)` | ScheduledAdmissionDate | X |
| `(0038-001B)` | ScheduledAdmissionTime | X |
| `(0038-001C)` | ScheduledDischargeDate | X |
| `(0038-001D)` | ScheduledDischargeTime | X |
| `(0038-001E)` | ScheduledPatientInstitutionResidence | X |
| `(0038-0020)` | AdmittingDate | X |
| `(0038-0021)` | AdmittingTime | X |
| `(0038-0030)` | DischargeDate | X |
| `(0038-0032)` | DischargeTime | X |
| `(0038-0040)` | DischargeDiagnosisDescription | X |
| `(0038-0050)` | SpecialNeeds | X |
| `(0038-0060)` | ServiceEpisodeID | X |
| `(0038-0061)` | IssuerOfServiceEpisodeID | X |
| `(0038-0062)` | ServiceEpisodeDescription | X |
| `(0038-0300)` | CurrentPatientLocation | X |
| `(0038-0400)` | PatientInstitutionResidence | X |
| `(0038-0500)` | PatientState | X |
| `(0038-4000)` | VisitComments | X |
| `(0040-0001)` | ScheduledStationAETitle | X |
| `(0040-0002)` | ScheduledProcedureStepStartDate | X |
| `(0040-0003)` | ScheduledProcedureStepStartTime | X |
| `(0040-0004)` | ScheduledProcedureStepEndDate | X |
| `(0040-0005)` | ScheduledProcedureStepEndTime | X |
| `(0040-0006)` | ScheduledPerformingPhysicianName | X |
| `(0040-0007)` | ScheduledProcedureStepDescription | X |
| `(0040-0009)` | ScheduledProcedureStepID | X |
| `(0040-000B)` | ScheduledPerformingPhysicianIdentificationSequence | X |
| `(0040-0010)` | ScheduledStationName | X |
| `(0040-0011)` | ScheduledProcedureStepLocation | X |
| `(0040-0012)` | PreMedication | X |
| `(0040-0241)` | PerformedStationAETitle | X |
| `(0040-0242)` | PerformedStationName | X |
| `(0040-0243)` | PerformedLocation | X |
| `(0040-0244)` | PerformedProcedureStepStartDate | X |
| `(0040-0245)` | PerformedProcedureStepStartTime | X |
| `(0040-0250)` | PerformedProcedureStepEndDate | X |
| `(0040-0251)` | PerformedProcedureStepEndTime | X |
| `(0040-0253)` | PerformedProcedureStepID | X |
| `(0040-0254)` | PerformedProcedureStepDescription | X |
| `(0040-0275)` | RequestAttributesSequence | X |
| `(0040-0280)` | CommentsOnThePerformedProcedureStep | X |
| `(0040-0281)` | PerformedProcedureStepDiscontinuationReasonCodeSequence | X |
| `(0040-0310)` | CommentsOnRadiationDose | X |
| `(0040-050A)` | SpecimenAccessionNumber | X |
| `(0040-0555)` | AcquisitionContextSequence | X |
| `(0040-06FA)` | SlideIdentifier | X |
| `(0040-1001)` | RequestedProcedureID | X |
| `(0040-1002)` | ReasonForTheRequestedProcedure | X |
| `(0040-1004)` | PatientTransportArrangements | X |
| `(0040-1005)` | RequestedProcedureLocation | X |
| `(0040-1010)` | NamesOfIntendedRecipientsOfResults | X |
| `(0040-1011)` | IntendedRecipientsOfResultsIdentificationSequence | X |
| `(0040-1102)` | PersonAddress | X |
| `(0040-1103)` | PersonTelephoneNumbers | X |
| `(0040-1400)` | RequestedProcedureComments | X |
| `(0040-2001)` | ReasonForTheImagingServiceRequest | X |
| `(0040-2004)` | IssueDateOfImagingServiceRequest | X |
| `(0040-2005)` | IssueTimeOfImagingServiceRequest | X |
| `(0040-2008)` | OrderEnteredBy | X |
| `(0040-2009)` | OrderEntererLocation | X |
| `(0040-2010)` | OrderCallbackPhoneNumber | X |
| `(0040-2016)` | PlacerOrderNumberImagingServiceRequest | Z |
| `(0040-2017)` | FillerOrderNumberImagingServiceRequest | Z |
| `(0040-2400)` | ImagingServiceRequestComments | X |
| `(0040-3001)` | ConfidentialityConstraintOnPatientDataDescription | X |
| `(0040-4023)` | ReferencedGeneralPurposeScheduledProcedureStepTransactionUID | U |
| `(0040-4025)` | ScheduledStationNameCodeSequence | X |
| `(0040-4027)` | ScheduledStationGeographicLocationCodeSequence | X |
| `(0040-4030)` | PerformedStationGeographicLocationCodeSequence | X |
| `(0040-4034)` | ScheduledHumanPerformersSequence | X |
| `(0040-4035)` | ActualHumanPerformersSequence | X |
| `(0040-4036)` | HumanPerformerOrganization | X |
| `(0040-4037)` | HumanPerformerName | X |
| `(0040-A073)` | VerifyingObserverSequence | X |
| `(0040-A075)` | VerifyingObserverName | D |
| `(0040-A078)` | AuthorObserverSequence | X |
| `(0040-A07A)` | ParticipantSequence | X |
| `(0040-A07C)` | CustodialOrganizationSequence | X |
| `(0040-A088)` | VerifyingObserverIdentificationCodeSequence | Z |
| `(0040-A122)` | Time | X |
| `(0040-A123)` | PersonName | D |
| `(0040-A124)` | UID | U |
| `(0040-A730)` | ContentSequence | X |
| `(0040-DB06)` | TemplateVersion | X |
| `(0040-DB07)` | TemplateLocalVersion | X |
| `(0040-DB0C)` | TemplateExtensionOrganizationUID | U |
| `(0040-DB0D)` | TemplateExtensionCreatorUID | U |
| `(0060-3000)` | HistogramSequence | X |
| `(0070-031A)` | FiducialUID | U |
| `(0088-0140)` | StorageMediaFileSetUID | U |
| `(0088-0200)` | IconImageSequence | X |
| `(0088-0906)` | TopicSubject | X |
| `(0088-0910)` | TopicAuthor | X |
| `(0088-0912)` | TopicKeywords | X |
| `(0400-0100)` | DigitalSignatureUID | U |
| `(2030-0010)` | AnnotationPosition | Z |
| `(2030-0020)` | TextString | X |
| `(2040-0010)` | ReferencedOverlayPlaneSequence | Z |
| `(2040-0011)` | ReferencedOverlayPlaneGroups | Z |
| `(2040-0020)` | OverlayPixelDataSequence | Z |
| `(2040-0060)` | OverlayMagnificationType | Z |
| `(2040-0070)` | OverlaySmoothingType | Z |
| `(2040-0072)` | OverlayOrImageMagnification | Z |
| `(2040-0074)` | MagnifyToNumberOfColumns | Z |
| `(2040-0080)` | OverlayForegroundDensity | Z |
| `(2040-0082)` | OverlayBackgroundDensity | Z |
| `(2040-0090)` | OverlayMode | Z |
| `(2040-0100)` | ThresholdDensity | Z |
| `(2040-0500)` | ReferencedImageBoxSequenceRetired | Z |
| `(2100-0020)` | ExecutionStatus | Z |
| `(2100-0030)` | ExecutionStatusInfo | Z |
| `(2100-0040)` | CreationDate | X |
| `(2100-0050)` | CreationTime | X |
| `(2100-0070)` | Originator | X |
| `(2110-0010)` | PrinterStatus | Z |
| `(2110-0020)` | PrinterStatusInfo | Z |
| `(2110-0030)` | PrinterName | Z |
| `(2110-0099)` | PrintQueueID | Z |
| `(3006-0024)` | ReferencedFrameOfReferenceUID | U |
| `(3006-00C2)` | RelatedFrameOfReferenceUID | U |
| `(300A-0013)` | DoseReferenceUID | U |
| `(4000-0010)` | Arbitrary | X |
| `(4000-4000)` | TextComments | X |
| `(4008-0042)` | ResultsIDIssuer | X |
| `(4008-0102)` | InterpretationRecorder | X |
| `(4008-010A)` | InterpretationTranscriber | X |
| `(4008-010B)` | InterpretationText | X |
| `(4008-010C)` | InterpretationAuthor | X |
| `(4008-0111)` | InterpretationApproverSequence | X |
| `(4008-0114)` | PhysicianApprovingInterpretation | X |
| `(4008-0115)` | InterpretationDiagnosisDescription | X |
| `(4008-0118)` | ResultsDistributionListSequence | X |
| `(4008-0119)` | DistributionName | X |
| `(4008-011A)` | DistributionAddress | X |
| `(4008-0202)` | InterpretationIDIssuer | X |
| `(4008-0300)` | Impressions | X |
| `(4008-4000)` | ResultsComments | X |
**Legend for Actions**:
- **U**: Keep the tag but ensure it is unique.
- **X**: Remove the tag entirely.
- **Z**: Replace the tag value with anonymized data.
- **D**: Clean the tag value (e.g., remove sensitive information but keep the tag).
- **C:VALUE**: Replace the tag value with a custom value.