23 CP Add Tracking Identifier and UID to Segmentation Instances

Transcription

1 23 CP Add Tracking Identifier and UID to Segmentation Instances Page 1 1 Status Final Text 2 Date of Last Update 2016/01/19 3 Person Assigned David Clunie 4 mailto:dclunie@dclunie.com 5 Submitter Name QIICR 6 Submission Date 2015/05/07 7 Correction Number CP Log Summary: Add Tracking Identifier and UID to Segmentation Instances 9 Name of Standard 10 PS3.3, PS3.6, PS3.15, PS c 11 Rationale for Correction: 12 Currently, some measurement related and CAD SR templates include a human readable identifier and a UID for longitudinal tracking 13 of lesions or other findings that may have multiple content items within one SR or occur in multiple SR instances. Often specific 14 occurences of such lesions on an image or at one particular timepoint will be associated with Segmentation instances, and these 15 are referenced from the SR using the Segmentation SOP Instance UID and Segment Number. 16 It is desirable to also be able to identify lesions in the same manner within a segmentation instance, so that the lesion may be 17 identified without the need to consult the SR (or indeed, without the need for there to be an SR, e.g., if no measurements are made, 18 or for there to be an SR at the time of segmentation). 19 This correction incorporates an earlier proposal, CP 757, which addressed the same issue for both Segmentation and RT Structure 20 Set objects, and has been cancelled. 21 Correction Wording: 22 - Final Text -

2 39 CP Add Tracking Identifier and UID to Segmentation Instances Page 2 1 Amend DICOM PS as follows: 2 C Segment Description Macro 3 4 Table C Segment Description Macro Attributes 5 Attribute Name Tag Type Attribute Description 6 Segment Number (0062,0004) 1 Identification number of the segment. The value of Segment Number (0062,0004) shall 7 be unique within the Segmentation instance in which it is created. See???. 8 Segment Label (0062,0005) 1 User-defined label identifying this segment. This may be the same as Code Meaning 9 (0008,0104) of Segmented Property Type Code Sequence (0062,000F) Tracking ID (0062,0020) 1C A text label used for tracking a finding or feature, potentially across multiple 12 reporting objects, over time. This label shall be unique within the domain in which 13 it is used. 14 Required if Tracking UID (0062,0021) is present. 15 Note May be used for tracking a finding or feature that is described by 17 this segment, potentially across multiple objects, over time May or may not have the same value as Segment Label (0062,0005) Related SR instances may exist, for example, to record measurements 20 related to this segment, but need not exist for this Attribute to be 21 used This Attribute will have the same value as the value of the (112039, 23 DCM, "Tracking Identifier") content item in SR instances that 24 reference this Segment in this Segmentation Instance. 25 Tracking UID (0062,0021) 1C A unique identifier used for tracking a finding or feature, potentially across multiple 26 reporting objects, over time. 27 Required if Tracking ID (0062,0020) is present. 28 Note May be used for tracking a finding or feature that is described by 30 this segment, potentially across multiple objects, over time Related SR instances may exist, for example, to record measurements 32 related to this segment, but need not exist for this Attribute to be 33 used This Attribute will have the same value as the value of the (112040, 35 DCM, "Tracking Unique Identifier") content item in SR instances that 36 reference this Segment in this Segmentation Instance. 37 Amend DICOM PS as follows: 38 - Final Text -

3 46 CP Add Tracking Identifier and UID to Segmentation Instances Page Registry of DICOM Data Elements 2 Table 6-1. Registry of DICOM Data Elements 3 Tag Name Keyword VR VM 4 (0062,0020) Tracking ID TrackingID UT 1 5 (0062,0021) Tracking UID TrackingUID UI 1 6 Amend DICOM PS as follows: 7 E.1.1 De-identifier 8 9 Table E.1-1. Application Level Confidentiality Profile Attributes 10 Attribute Tag Retired In Std. Basic Retain Retain Retain Retain Retain Retain Clean Clean Clean 11 Name (from Comp. Profile Safe UIDs Device Patient Long. Long. Desc. Struct. Graph. 12????) IOD Private Option Ident. Chars. Full Modif. Option Cont. Option 13 (from Option Option Option Dates Dates Option 14????) Option Option Tracking (0062,0021) N Y U K 17 UID 18 Amend DICOM PS as follows: 19 TID 1401 Area Measurement Type: Extensible Order: Significant Root: No 26 Table TID Area Measurement 27 NL Rel with Parent VT Concept Name VM Req Condition Value Set Constraint 28 Type 29 1 NUM D??? Value shall be > 0 30 UNITS = D??? 31 2 > INFERRED SCOORD EV (121056, DCM, C IF concept name of Row GRAPHIC TYPE = not 32 FROM "Area Outline") 1 is (G-A16A, SRT, "Area {MULTIPOINT} 33 of defined region"), and 34 IFF Row 5 or 6 not 35 present >> R-SELECTED IMAGE C XOR Row 4 37 FROM 38 4 >> SELECTED IMAGE C XOR Row 3 39 FROM 40 5 > INFERRED IMAGE EV (121214, DCM, C IF concept name of Row Reference shall be to a 41 FROM "Referenced 1 is (G-A16A, SRT, "Area Segmentation Image, 42 Segmentation of defined region"), and with a single value 43 Frame") IFF Row 2 or 6 not specified in Referenced 44 present. Frame Number 45 - Final Text -

4 47 CP Add Tracking Identifier and UID to Segmentation Instances Page 4 1 NL Rel with Parent VT Concept Name VM Req Condition Value Set Constraint 2 Type 3 6 > R- INFERRED IMAGE C IF concept name of Row Reference shall be to a 4 FROM 1 is (G-A16A, SRT, "Area Segmentation Image, 5 of defined region"), and with a single value 6 IFF Row 2 or 5 not specified in Referenced 7 present. Frame Number 8 7 > HAS CODE EV (G-C036, SRT, 1 U D??? 9 PROPERTIES "Measurement 10 Method") 11 8 > HAS OBS INCLUDE DTID U 12 CONTEXT Tracking Identifier 13 Content Item Descriptions 14 Row 2 "Area Outline" A Graphic Type of POINT implies that the object is a single pixel and the object's area is the area of the pixel. 15 Otherwise the type shall be a closed POLYLINE (start and end point the same) or a CIRCLE or an ELLIPSE. 16 Rows 5, 6 Referenced Frame Number (0008,1160) is an attribute of the IMAGE Content Item. 17 If the Referenced Segmentation SOP Instance has Segmentation Type (0062,0001) value BINARY, it identifies 18 the area of defined (measured) region by pixel values in the referenced frame with value 1. For Segmentation 19 Type value FRACTIONAL, the area is computed by an implementation dependent method. 20 Frame number shall be specified even if the Segmentation SOP Instance has only a single frame. 21 Row 8 The values of (112039, DCM, "Tracking Identifier") and (112040, DCM, "Tracking Unique Identifier"), if 22 present, shall match the corresponding values of Tracking ID (0062,0020) and Tracking UID (0062,0021), 23 if present, in the corresponding Segment of any Segmentation instance referenced in Row TID 1402 Volume Measurement Type: Extensible Order: Significant Root: No 31 Table TID Volume Measurement 32 NL Rel with Parent VT Concept Name VM Req Condition Value Set Constraint 33 Type 34 1 NUM D??? Value shall be > 0 35 UNITS = D??? 36 2 > INFERRED FROM SCOORD EV (121057, DCM, 1-n UC XOR row 5, 6 GRAPHIC TYPE = not 37 "Perimeter Outline") {MULTIPOINT} 38 3 >> R-SELECTED IMAGE C XOR Row 4 39 FROM 40 4 >> SELECTED FROM IMAGE C XOR Row > INFERRED FROM IMAGE EV (121191, DCM, 1 UC XOR row 2, 6 Reference shall be to a 42 "Referenced Segmentation Image, with 43 Segment") a value specified in 44 Referenced Segment 45 Number 46 - Final Text -

5 48 CP Add Tracking Identifier and UID to Segmentation Instances Page 5 1 NL Rel with Parent VT Concept Name VM Req Condition Value Set Constraint 2 Type 3 6 > R- INFERRED IMAGE 1 UC XOR row 2, 5 Reference shall be to a 4 FROM Segmentation Image, with 5 a value specified in 6 Referenced Segment 7 Number 8 7 > HAS PROPERTIES CODE EV (G-C036, SRT, 1 U D??? 9 "Measurement 10 Method") 11 8 > HAS OBS INCLUDE DTID 4108 Tracking 1 U 12 CONTEXT Identifier 13 Content Item Descriptions 14 Row 2 "Perimeter The two dimensional perimeter of the volume's intersection with or projection into the image. A Graphic Type 15 Outline" of POINT implies that the volume's intersection or projection in a plane is a single pixel. A single pixel projection 16 perimeter cannot cause a volume calculation to become Otherwise the type shall be a closed POLYLINE (start and end point the same) or a CIRCLE or an ELLIPSE. 18 Rows 5, 6 Referenced Segment Number (0062,000B) is an attribute of the IMAGE Content Item. 19 If the Referenced Segmentation SOP Instance has Segmentation Type (0062,0001) value BINARY, it identifies 20 the defined (measured) volume by pixel/voxel values in the frames of the referenced segment with value For Segmentation Type value FRACTIONAL, the volume is computed by an implementation dependent method. 22 Segment number shall be specified even if the Segmentation SOP Instance has only a single segment. 23 Row 8 The values of (112039, DCM, "Tracking Identifier") and (112040, DCM, "Tracking Unique Identifier"), if 24 present, shall match the corresponding values of Tracking ID (0062,0020) and Tracking UID (0062,0021), 25 if present, in the corresponding Segment of any Segmentation instance referenced in Row TID 1410 Planar ROI Measurements Table TID Planar ROI Measurements 29 NL Rel with Parent VT Concept Name VM Req Condition Value Set Constraint 30 Type 31 1 CONTAINER EV (125007, DCM, 32 "Measurement Group") 33 2 > HAS OBS TEXT DT (112039, DCM, 34 CONTEXT "Tracking Identifier") 35 3 > HAS OBS UIDREF EV (112040, DCM, 36 CONTEXT "Tracking Unique 37 Identifier") > CONTAINS IMAGE EV (121214, DCM, C XOR Row Reference shall be to a 40 "Referenced Segmentation 5 Segmentation Image, with 41 Frame") a single value specified in 42 Referenced Frame 43 Number, and with a single 44 value specified in 45 Referenced Segment 46 Number 47 - Final Text -

6 42 CP Add Tracking Identifier and UID to Segmentation Instances Page 6 1 NL Rel with Parent VT Concept Name VM Req Condition Value Set Constraint 2 Type 3 4 Content Item Descriptions 5 Rows 2, 3 The Tracking Identifier and Tracking Unique Identifier are defined as a text label or unique identifier (respectively) 6 used for tracking a finding or feature, potentially across multiple reporting objects, over time. As such, they are 7 distinct from the Observation UID (0040,A171), which is unique identifier of the specific Content Item and its subsidiary 8 Content Items that constitute an individual observation, and would be different for different observations on different 9 occasions of the same finding or feature. The values of these content items shall match the corresponding 10 values of Tracking ID (0062,0020) and Tracking UID (0062,0021), if present, in the corresponding Segment 11 of any Segmentation instance referenced in Row Rows 6, 7 Referenced Frame Number (0008,1160) is an attribute of the IMAGE Content Item, and shall be present with a 13 single value. 14 If the Referenced Segmentation SOP Instance has Segmentation Type (0062,0001) value BINARY, it identifies the 15 area of defined (measured) region of interest by pixel values in the referenced frame with value 1. For Segmentation 16 Type value FRACTIONAL, the area is computed by an implementation dependent method. 17 Frame number shall be specified even if the Segmentation SOP Instance has only a single frame TID 1411 Volumetric ROI Measurements Table TID Volumetric ROI Measurements 22 NL Rel with Parent VT Concept Name VM Req Condition Value Set Constraint 23 Type 24 1 CONTAINER EV (125007, DCM, 25 "Measurement Group") 26 2 > HAS OBS TEXT DT (112039, DCM, 27 CONTEXT "Tracking Identifier") 28 3 > HAS OBS UIDREF EV (112040, DCM, 29 CONTEXT "Tracking Unique 30 Identifier") > CONTAINS IMAGE EV (121191, DCM, C XOR Rows Reference shall be to a 33 "Referenced Segment") 5, 10 Segmentation Image or 34 Surface Segmentation 35 object, with a single 36 value specified in 37 Referenced Segment 38 Number Content Item Descriptions 41 - Final Text -

7 48 CP Add Tracking Identifier and UID to Segmentation Instances Page 7 1 Rows 2, 3 The Tracking Identifier and Tracking Unique Identifier are defined as a text label or unique identifier (respectively) 2 used for tracking a finding or feature, potentially across multiple reporting objects, over time. As such, they are distinct 3 from the Observation UID (0040,A171), which is unique identifier of the specific Content Item and its subsidiary Content 4 Items that constitute an individual observation, and would be different for different observations on different occasions 5 of the same finding or feature.the values of these content items shall match the corresponding values of 6 Tracking ID (0062,0020) and Tracking UID (0062,0021), if present, in the corresponding Segment of any 7 Segmentation instance referenced in Row 7. 8 Rows 6, 7 Referenced Segment Number (0062,000B) is an attribute of the IMAGE Content Item, and shall be present with a 9 single value. 10 If the Referenced SOP Instance is a Segmentation Image, it shall have a defined Frame of Reference. If it has 11 Segmentation Type (0062,0001) value BINARY, it identifies the volume of defined (measured) region of interest by 12 voxel values in the referenced segment with value 1. If it has Segmentation Type value FRACTIONAL, the volume 13 is defined by an implementation dependent method. 14 If the referenced SOP Instance is a Surface Segmentation, the referenced segment shall constitute a finite volume. 15 It identifies the volume of the defined (measured) region of interest by the interior of the finite volume. 16 Segment number shall be specified even if the Segmentation SOP Instance has only a single segment TID 4108 Tracking Identifier 19 This Template provides a means to identify an object for longitudinal tracking, potentially across multiple Structured Reports, over 20 time Type: Non-Extensible Order: Significant Root: No 27 Table TID Tracking Identifier 28 NL Rel with VT Concept Name VM Req Type Condition Value Set Constraint 29 Parent 30 1 TEXT EV (112039, DCM, C At least one of row 1 or A string of characters with 31 "Tracking Identifier") 2 shall be present. case being non-significant. 32 Leading and trailing spaces 33 and control characters are 34 forbidden UIDREF EV (112040, DCM, C At least one of row 1 or 36 "Tracking Unique 2 shall be present. 37 Identifier") 38 Content Item Descriptions 39 Tracking Identifier A human readable identifier for longitudinal tracking, e.g., "Watchlist Nodule 1". 40 Tracking Unique Identifier This is distinct from the Observation UID (0040,A171) that may be present in the data set for 41 each Content Item, which identifies only a specific observation, not an object tracked over time, 42 and each tracked object may have many observations. 43 D DICOM Controlled Terminology Definitions (Normative) 44 This Annex specifies the meanings of codes defined in DICOM, either explicitly or by reference to another part of DICOM or an ex- 45 ternal reference document or standard. 46 DICOM Code Definitions (Coding Scheme Designator "DCM" Coding Scheme Version "01") 47 - Final Text -

8 11 CP Add Tracking Identifier and UID to Segmentation Instances Page 8 1 Table D-1. DICOM Controlled Terminology Definitions 2 Code Value Code Meaning Definition Notes Tracking Identifier A text label used for tracking a finding or feature, potentially across 4 multiple reporting objects, over time. This label shall be unique within 5 the domain in which it is used. Corresponds to Tracking ID 6 (0062,0020) Tracking Unique Identifier A unique identifier used for tracking a finding or feature, potentially 8 across multiple reporting objects, over time. Corresponds to Tracking 9 UID (0062,0021) Final Text -