TID 4100 Chest CAD Document Root Template

This template forms the top of a content tree that allows a chest CAD device to describe the results of detection and analysis of chest evidence. This template, together with its subordinate templates, describes both the results for presentation to radiologists and partial product results for consumption by chest CAD devices in subsequent chest CAD reports.

This template defines a Container that contains an Image Library, the CAD results, and summaries of the detection and analysis algorithms performed. The Image Library contains the Image SOP Class and Instance UIDs, and selected attributes for each image referenced in either the algorithm summaries or chest CAD results.

The atomic CAD results of Single Image Findings and Composite Features are described in the Chest CAD Findings Summary sub-tree.

The Summary of Detections and Summary of Analyses sub-trees gather lists of algorithms attempted, grouped by success/failure status. Algorithms not attempted are not mentioned in these sub-trees. This information forms the basis for understanding why a chest CAD report may produce no (or fewer than anticipated) results. Chest CAD results are constructed bottom-up, starting from Single Image Findings (see TID 4104), associated as Composite Features (see TID 4102).

See the figure entitled “Top Levels of Chest CAD SR Content Tree” in the “Chest CAD” Annex of PS 3.17.

TID 4100CHEST CAD DOCUMENT ROOTType: Non-Extensible Order: Significant

NL Rel with Parent VT Concept Name VM Req Type Condition Value Set Constraint
1 CONTAINER EV (112000, DCM, “Chest CAD Report”) 1 M
2 > HAS CONCEPT MOD INCLUDE DTID (1204) Language of Content Item and Descendants 1 M
3 > CONTAINS CONTAINER EV (111028, DCM, “Image Library”) 1 U
4 >> CONTAINS INCLUDE DTID (4020) CAD Image Library Entry 1-n M $ImageLaterality = DCID (244) Laterality $ImageView = DCID (4010) DX View $ImageViewMod = DCID (4011) DX View Modifier
5 > CONTAINS INCLUDE DTID (4101) Chest CAD Findings Summary 1 M
6 > CONTAINS CODE EV (111064, DCM, “Summary of Detections”) 1 M DCID (6042) Status of Results
7 >> INFERRED FROM INCLUDE DTID (4015) CAD Detections Performed 1 MC Shall be present unless the value of row 6 is (111225, DCM, “Not Attempted”) $DetectionCode = DCID (6101) Chest Finding or Feature, DCID (6102) Chest Finding or Feature Modifier
8 > CONTAINS CODE EV (111065, DCM, “Summary of Analyses”) 1 M DCID (6042) Status of Results
9 >> INFERRED FROM INCLUDE DTID (4016) CAD Analyses Performed 1 MC Shall be present unless the value of row 8 is (111225, DCM, “Not Attempted”) $AnalysisCode = DCID (6137) Types of CAD Analysis

Content Item Descriptions

Image Library The “Image Library” section of the Content Tree (TID 4100, row 3) may include all Image SOP Instances from the Current Requested Procedure Evidence Sequence (0040,A375) attribute of the SR Document General module. If a portion of another instance of a Chest CAD SR IOD is duplicated in the “Chest CAD Findings Summary” section of the Content Tree, the “Image Library” may also include all Image Library Entries referenced from the duplicated portions of the Chest CAD SR. The Image Library is intended to be used in cases where the acquisition context content items differ from image to image, such as different views and/or laterality in projection X-Ray.
Detections Performed The “Detections Performed” and “Analyses Performed” sections of the Content Tree (TID 4100, rows 7 and 9) together shall reference all Image SOP Instances included in the Current Requested Procedure Evidence Sequence (0040,A375) attribute of the SR Document General module.
Analyses Performed