CP-1744 Make anatomical information encoding in general and visible light images consistent Status Assigned Date of Last Update 2017/09/13 Person Assigned David Clunie Submitter Name David Clunie Submission Date 2017/09/13 Correction Number CP-1744 Log Summary: Make anatomical information encoding in general and visible light images consistent Name of Standard PS3.3 Rationale for Correction: Older IODs lack a standard mechanism for including anatomic region codes equivalent to the string Body Part Examined, while more recent IODs consistently use Anatomic Region Sequence and Image Laterality. For enterprise imaging it is desirable that these be made consistent. For visible light imaging, such as the VL Photographic IOD, Anatomic Region Sequence is included via the VL Image Module, but Image Laterality is not, which is inconsistent with the pattern established, for example, by Digital X-Ray IODs. The Image Laterality attribute is in widespread use, rather than requiring that it be sent as a modifier of Primary Anatomic Structure Sequence, which is rarely used in practice. Add the necessary attributes as optional in the General Image Module. These are image-level attributes and cannot be added to the General Series Module. The single site optional General Anatomy Macro is added, rather than the multiple site macro, so as not to cause conflict with IODs that include both the General Image Module and more specific Modules that already include Anatomic Region Sequence (e.g., Digital X-Ray). In addition, common anatomy context groups are added for the VL usage, which were not defined at the time of the original VL IOD inclusion.. It is expected that additional application-specific context groups will be added in future (e.g., see dermatology-related CP 1674). [Ed.Note. The VL Image Module does not use the macros for general anatomy because of the funky condition on inclusion of Anatomic Region Sequence related to specimens and endoscopy.] [Ed.Note. An alternative to adding these to the General Image Module would be to create a new Anatomy Imaged Module, analogous to the C.8.11.2 DX Anatomy Imaged Module, which would include only the added attributes, and add it optionally to all the IODs that include General Image and do not already include these attributes.] [Ed.Note. Does "unilateral" mean sided but unspecified side, or no side? Correction Wording: <informaltable rules="all" frame="box"> <tr> <td> <para><emphasis role="italic">Amend DICOM PS3.3 as follows (changes to existing text are bold and <emphasis role="bold"><emphasis role="underline">underlined</emphasis></emphasis> for additions and <emphasis role="bold"><emphasis role="strikethrough">struckthrough</emphasis></emphasis> for removals):</emphasis></para> </td> </tr> </informaltable> <section label="10.5" status="2" xml:id="sect_10.5"> <title>General Anatomy Macros ... describe the attributes for identifying the general region of the patient anatomy examined using coded terminology, as well as the principal structure(s) within that region that is the target of the current SOP Instance. The only differences between the macros are the Type and Number of Items of the Anatomic Region Sequence (0008,2218) attribute. describe the attributes for the coding of the principal structure only. The invocation of these macros may specify Baseline or Defined CIDs for the Anatomic Region Sequence (0008,2218), the Anatomic Region Modifier Sequence (0008,2220), and/or the Primary Anatomic Structure Sequence (0008,2228). The general region of the body (e.g., the anatomic region, organ, or body cavity being examined) is identified by the Anatomic Region Sequence (0008,2218). Characteristics of the anatomic region being examined, such as sub-region (e.g., medial, lateral, superior, inferior, lobe, quadrant) and laterality (e.g., right, left, both), may be refined by the Anatomic Region Modifier Sequence (0008,2220). These Attributes allow the specification of the information encoded by the Body Part Examined (0018,0015) in the General Series Module in a more robust, consistent way. The specific anatomic structures of interest within the image (e.g., a particular artery within the anatomic region) is identified by the Primary Anatomic Structure Sequence (0008,2228). Characteristics of the anatomic structure, such as its location (e.g., subcapsular, peripheral, central), configuration (e.g., distended, contracted), and laterality (e.g., right, left, both), and so on, may be refined by the Primary Anatomic Structure Modifier Sequence (0008,2230). Laterality is often encoded in a separate Attribute, Image Laterality (0020,0062), rather than in Anatomic Region Modifier Sequence (0008,2220) or Primary Anatomic Structure Modifier Sequence (0008,2230). The correspondence between the values is as follows: Image Laterality (0020,0062) Coded Modifier L (G-A101, SRT, "Left") R (G-A100, SRT, "Right") U (G-A103, SRT, "Unilateral") B (G-A102, SRT, "Right and left") The codes illustrated are from CID 244 "Laterality". Whether or not various anatomical structures may be paired or unpaired (have laterality) is illustrated in Table L-5 in PS3.17. ...
General Anatomy Optional Macro Attributes
Attribute Name Tag Type Attribute Description
Anatomic Region Sequence (0008,2218) 3 Sequence that identifies the anatomic region of interest in this Instance (i.e., external anatomy, surface anatomy, or general region of the body). Only a single Item is permitted in this Sequence.
>Include Table 8.8-1 "Code Sequence Macro Attributes" Context ID may be defined in the macro invocation.
>Anatomic Region Modifier Sequence (0008,2220) 3 Sequence of Items that modifies the anatomic region of interest of this Instance One or more Items are permitted in this Sequence.
>>Include Table 8.8-1 "Code Sequence Macro Attributes" Defined CID 2 "Anatomic Modifier", unless otherwise defined in the macro invocation.
Include Context ID may be defined in the macro invocation.
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Primary Anatomic Structure Macro Attributes
Attribute Name Tag Type Attribute Description
Primary Anatomic Structure Sequence (0008,2228) 3 Sequence of Items that identifies the primary anatomic structure(s) of interest in this Instance. One or more Items are permitted in this Sequence.
>Include Table 8.8-1 "Code Sequence Macro Attributes" Context ID may be defined in the macro invocation.
>Primary Anatomic Structure Modifier Sequence (0008,2230) 3 Sequence of Items that modifies the primary anatomic structure of interest in this Instance. One or more Items are permitted in this Sequence.
>>Include Table 8.8-1 "Code Sequence Macro Attributes" Defined Defined CID 2 "Anatomic Modifier".
General Image Module specifies the Attributes that identify and describe an image within a particular series.
General Image Module Attributes
Attribute Name Tag Type Attribute Description
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Image Laterality (0020,0062) 3 Laterality of (possibly paired) body part (as described in Anatomic Region Sequence (0008,2218)) examined. <emphasis role="bold"><emphasis role="underline">Enumerated Values:</emphasis></emphasis> R right L left U unpaired B both left and right Shall be consistent with any laterality information contained in Primary Anatomic Structure Modifier Sequence (0008,2230) and/or Laterality (0020,0060), if present.
Include Baseline CID for the Anatomic Region Sequence is CID 4031 "Common Anatomic Regions" for humans and CID 7483 "Common Anatomic Regions for Animals" for animals.
DX Anatomy Imaged Module contains IOD Attributes that describe the anatomy contained in a DX IOD.
DX Anatomy Imaged Module Attributes
Attribute Name Tag Type Attribute Description
Image Laterality (0020,0062) 1 Laterality of (possibly paired) body part (as described in Anatomic Region Sequence (0008,2218)) examined. Enumerated Values: R right L left U unpaired B both left and right This Attribute is mandatory, in order to ensure that images may be positioned correctly relative to one another for display. Shall be consistent with any laterality information contained in Primary Anatomic Structure Modifier Sequence (0008,2230), if present. Laterality (0020,0060) is a Series level Attribute and must be the same for all Images in the Series, hence it must be absent.
Include Table 10-6 "General Anatomy Required Macro Attributes" Defined CID for the Anatomic Region Sequence is CID 4009 "" for humans, and CID 7482 "DX Anatomy Imaged for Animals" for animals. This is the anatomic region that is placed on the table or bucky for examination. It is strongly recommended that Anatomic Region Sequence (0008,2218) be present with a value, in order to ensure that images may be positioned correctly relative to one another for display.
DX Anatomy Imaged Attribute Descriptions The Attributes in this Module extend the function of Body Part Examined (0018,0015) as used in other IODs, and are intended to be used to facilitate the management of images and series in terms of routing, storage and display, as well as to dictate certain Conditions on Attributes and Modules in the DX IOD.
VL Image Module specifies the Attributes that describe a VL Image produced by Endoscopy (ES), General Microscopy (GM), Automated-Stage Microscopy (SM), External-camera Photography (XC), or other VL imaging Modalities.
VL Image Module Attributes
Attribute Name Tag Type Attribute Description
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Image Laterality (0020,0062) 3 Laterality of (possibly paired) body part (as described in Anatomic Region Sequence (0008,2218)) examined. <emphasis role="bold"><emphasis role="underline">Enumerated Values:</emphasis></emphasis> R right L left U unpaired B both left and right Shall be consistent with any laterality information contained in Primary Anatomic Structure Modifier Sequence (0008,2230) and/or Laterality (0020,0060), if present.
Anatomic Region Sequence (0008,2218) 1C Sequence that identifies the anatomic region of interest in this image (i.e., external anatomy, surface anatomy, or general region of the body). Only a single Item shall be included in this Sequence. Required if Number of Frames (0028,0008) is present and Specimen Description Sequence (0040,0560) is absent. May be present otherwise.
>Include Table 8.8-1 "Code Sequence Macro Attributes" Defined CID 4040 "Endoscopy Anatomic Regions" is defined for the Video Endoscopic IOD. For other IODs, no Context ID is defined. Baseline CID for the Anatomic Region Sequence is CID 4031 "Common Anatomic Regions" for humans and CID 7483 "Common Anatomic Regions for Animals" for animals.
>Anatomic Region Modifier Sequence (0008,2220) 3 Sequence of Items that modifies the anatomic region of interest of this image One or more Items are permitted in this Sequence.
>>Include Table 8.8-1 "Code Sequence Macro Attributes" Baseline CID 2 "Anatomic Modifier".
Include No Context ID is defined. These Type 3 Attributes are not appropriate when Specimen Description Sequence (0040,0560) is present, as it includes the Primary Anatomic Structure Macro for each specimen in the image.
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