{"id":2566,"date":"2017-09-04T11:28:51","date_gmt":"2017-09-04T11:28:51","guid":{"rendered":"https:\/\/medphys.royalsurrey.nhs.uk\/omidb\/?page_id=2566"},"modified":"2024-11-19T16:43:30","modified_gmt":"2024-11-19T16:43:30","slug":"de-identification","status":"publish","type":"page","link":"https:\/\/medphys.royalsurrey.nhs.uk\/omidb\/about-omi-db\/de-identification\/","title":{"rendered":"De-identification"},"content":{"rendered":"

Each medical image is stored in standard DICOM format. In addition to the pixel data (image)\u00a0 the DICOM header stores meta-data in fields that are known as \u201ctags\u201d which contain a large amount of information including patient identifiable information. In order to preserve the confidentiality of the patients, all header data is de-identified following the guidelines provided by DICOM Supplement 142 Annex A1. This supplement is an international standard for de-identification of data in medical image files.<\/p>\n

In total 222 DICOM tags are \u201cnulled\u201d (removed or obfuscated according to DICOM specifications), in some instances obfuscating is necessary in order to preserve the integrity of the DICOM file. A full list of all tags nulled can be found here.<\/a>
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DICOM tag<\/th>Description<\/th>\n<\/tr>\n<\/thead>\n
0008,0020<\/td>StudyDate<\/td>\n<\/tr>\n
0008,0021<\/td>SeriesDate<\/td>\n<\/tr>\n
0008,0022<\/td>AcquisitionDate<\/td>\n<\/tr>\n
0008,0023<\/td>ContentDate<\/td>\n<\/tr>\n
0008,0050<\/td>AccessionNumber<\/td>\n<\/tr>\n
0008,0090<\/td>ReferringPhysicianName<\/td>\n<\/tr>\n
0008,1010<\/td>StationName<\/td>\n<\/tr>\n
0008,1070<\/td>OperatorsName<\/td>\n<\/tr>\n
0020,0010<\/td>StudyID<\/td>\n<\/tr>\n
0020,4000<\/td>ImageComments<\/td>\n<\/tr>\n
0040,0244<\/td>PerformedProcedureStepStartDate<\/td>\n<\/tr>\n
0018,700a<\/td>DetectorID<\/td>\n<\/tr>\n
0018,700c<\/td>DateOfLastDetectorCalibration<\/td>\n<\/tr>\n
0400,0100<\/td>Digital Signature UID<\/td>\n<\/tr>\n
0020,000E<\/td>SeriesInstanceUID<\/td>\n<\/tr>\n
0040,A124<\/td>UID<\/td>\n<\/tr>\n
0000,1000<\/td>Affected SOP Instance UID<\/td>\n<\/tr>\n
0020,9161<\/td>Concatenation UID<\/td>\n<\/tr>\n
0008,010D<\/td>Context Group Extension Creator UID<\/td>\n<\/tr>\n
0008,9123<\/td>Creator Version UID<\/td>\n<\/tr>\n
0018,1002<\/td>Device UID<\/td>\n<\/tr>\n
0020,9164<\/td>Dimension Organization UID<\/td>\n<\/tr>\n
300A,0013<\/td>Dose Reference UID<\/td>\n<\/tr>\n
0070,031A<\/td>Fiducial UID<\/td>\n<\/tr>\n
0020,0052<\/td>Frame Of Reference UID<\/td>\n<\/tr>\n
0008,0014<\/td>Instance Creator UID<\/td>\n<\/tr>\n
0008,3010<\/td>Irradiation Event UID<\/td>\n<\/tr>\n
0028,1214<\/td>Large Palette Color Lookup Table UID<\/td>\n<\/tr>\n
0002,0003<\/td>Media Storage SOP Instance UID<\/td>\n<\/tr>\n
0028,1199<\/td>Palette Color Lookup Table UID<\/td>\n<\/tr>\n
3006,0024<\/td>Referenced Frame Of Reference UID<\/td>\n<\/tr>\n
0040,4023<\/td>Referenced General Purpose Scheduled Procedure Step Transaction UID<\/td>\n<\/tr>\n
0008,1155<\/td>Referenced SOP Instance UID<\/td>\n<\/tr>\n
0004,1511<\/td>Referenced SOP Instance UID In File<\/td>\n<\/tr>\n
3006,00C2<\/td>Related Frame Of Reference UID<\/td>\n<\/tr>\n
0000,1001<\/td>Requested SOP Instance UID<\/td>\n<\/tr>\n
0008,0018<\/td>SOP Instance UID<\/td>\n<\/tr>\n
0088,0140<\/td>Storage Media File Set UID<\/td>\n<\/tr>\n
0020,000D<\/td>Study Instance UID<\/td>\n<\/tr>\n
0020,0200<\/td>Synchronization Frame Of Reference UID<\/td>\n<\/tr>\n
0040,DB0D<\/td>Template Extension Creator UID<\/td>\n<\/tr>\n
0040,DB0C<\/td>Template Extension Organization UID<\/td>\n<\/tr>\n
0008,1195<\/td>Transaction UID<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n\n

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