DICOM PS3.17 2019b - Explanatory Information

NN.6 Examples of Specimen Module Use

This section includes examples of the use of the Specimen Module. Each example has two tables.

The first table contains the majority of the container and specimen elements of the Specimen Module. The second includes the Specimen Preparation Sequence (which documents the sampling, processing and staining steps).

In the first table, invocations of Macros have been expanded to their constituent Attributes. The Table does not include Type 3 (optional) Attributes that are not used for the example case.

The second table shows the Items of the Specimen Preparation Sequence and its subsidiary Specimen Preparation Step Content Item Sequence. That latter sequence itself has subsidiary Code Sequence Items, but these are shown in the canonical DICOM "triplet" format (see PS3.16), e.g., (44714003, SCT, "Left Upper Lobe of Lung"). In the table, inclusions of subsidiary templates have been expanded to their constituent Content Items. The Table does not include Type U (optional) Content Items that are not used for the example case.

Values in the colored columns of the two tables actually appear in the image object.

NN.6.1 Gross Specimen

This is an example of how the Specimen Module can be populated for a gross specimen (a lung lobe resection received from surgery). The associated image would be a gross image taken in gross room.

Table NN.6-1. Specimen Module for Gross Specimen

Attribute Name

Tag

Attribute Description

Example Value

Comments

Container Identifier

(0040,0512)

The identifier for the container that contains the specimen(s) being imaged.

S07-100 A

Note that the container ID is required, even though the container itself does not figure in the image.

Issuer of the Container Identifier Sequence

(0040,0513)

Organization that assigned the Container Identifier

>Local Namespace Entity ID

(0040,0031)

Identifies an entity within the local namespace or domain.

Case Medical Center

Container Type Code Sequence

(0040,0518)

Type of container that contains the specimen(s) being imaged. Zero or one items shall be permitted in this sequence

This would likely be a default container value for all gross specimens. The LIS does not keep information on the gross container type, so this is an empty sequence.

Specimen Description Sequence

(0040,0560)

Sequence of identifiers and detailed description of the specimen(s) being imaged. One or more Items shall be included in this Sequence.

>Specimen Identifier

(0040,0551)

A departmental information system identifier for the Specimen.

S07-100 A

Specimen and Container have same ID

>Issuer of the Specimen Identifier Sequence

(0040,0562)

The name or code for the institution that has assigned the Specimen Identifier.

>> Local Namespace Entity ID

(0040,0031)

Identifies an entity within the local namespace or domain.

Case Medical Center

>Specimen UID

(0040,0554)

Unique Identifier for Specimen

1.2.840.99790.986.33.1677.1.1.17.1

>Specimen Short Description

(0040,0600)

Short textual specimen description

Part A: LEFT UPPER LOBE

The LIS "Specimen Received" field is mapped to this DICOM field

>Specimen Detailed Description

(0040,0602)

Detailed textual specimen description

A: Received fresh for intraoperative consultation, labeled with the patient's name, number and "left upper lobe," is a pink-tan, wedge-shaped segment of soft tissue, 6.9 x 4.2 x 1.0 cm. The pleural surface is pink-tan and glistening with a stapled line measuring 12.0 cm. in length. The pleural surface shows a 0.5 cm. area of puckering. The pleural surface is inked black. The cut surface reveals a 1.2 x 1.1 cm, white-gray, irregular mass abutting the pleural surface and deep to the puckered area. The remainder of the cut surface is red-brown and congested. No other lesions are identified. Representative sections are submitted.

This is a mapping from the LIS "Gross Description" field. Note that in Case S07-100 there were six parts. This means the LIS gross description field will have six sections (A - F). We would have to parse the gross description field into those parts (A-F) and then only incorporate section "A" into this Attribute. NOTE: One could consider listing all the Blocks associated with Part A. It would be easy to do and might give useful information.

>Specimen Preparation Sequence

(0040,0610)

Sequence of Items identifying the process steps used to prepare the specimen for image acquisition. One or more Items may be present. This Sequence includes description of the specimen sampling step from a parent specimen, potentially back to the original part collection.

(see Table NN.6-2)

>>Specimen Preparation Step Content Item Sequence

(0040,0612)

Sequence of Content Items identifying the processes used in one preparation step to prepare the specimen for image acquisition. One or more Items may be present.

>Primary Anatomic Structure Sequence

(0008,2228)

Original anatomic location in patient of specimen. This location may be inherited from the parent specimen, or further refined by modifiers depending on the sampling procedure for this specimen.

>>Code Value

(0008,0100)

44714003

This is a code sequence item

>>Coding Scheme Designator

(0008,0102)

SCT

>>Code Meaning

(0008,0104)

Left Upper Lobe of Lung


Table NN.6-2. Specimen Preparation Sequence for Gross Specimen

Specimen Preparation Sequence - Item #

Specimen Prep. Step Content Item Sequence - Item #

Template / Row

Value Type (0040,A040)

Concept Name Code Sequence (0040,A043)

Example Value

Comments

1

1

8001 / 1

TEXT

(121041, DCM, "Specimen Identifier")

S07-100 A

Collection in OR

2

8001 / 2

TEXT

(111724, DCM, "Issuer of Specimen Identifier")

Case Medical Center

1

8001 / 3

CODE

(111701, DCM, "Processing type")

(17636008, SCT, "Specimen collection")

2

8001 / 4

DATETIME

(111702, DCM, "DateTime of processing")

200703230827

3

8001 / 5

TEXT

(111703, DCM, "Processing step description")

Taken

4

8001 / 8

8002 / 1

CODE

(111704, DCM, "Sampling Method")

(65801008, SCT, "Excision")

2

1

8001 / 1

TEXT

(121041, DCM, "Specimen Identifier")

S07-100 A

Specimen received in Pathology department

2

8001 / 2

TEXT

(111724, DCM, "Issuer of Specimen Identifier")

Case Medical Center

1

8001 / 3

CODE

(111701, DCM, "Processing type")

(428995007, SCT, "Specimen Receiving")

2

8001 / 4

DATETIME

(111702, DCM, "DateTime of processing")

200703230943


DICOM PS3.17 2019b - Explanatory Information