The Templates that comprise the Chest CAD SR IOD are interconnected as in Figure A-9.
In Figure A-9, '···' indicates possible recursive application of subordinate Templates.
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 “Chest CAD Single Image Finding”), associated as Composite Features (see TID 4102 “Chest CAD Composite Feature”).
See Figure F.1-1 “Top Levels of Chest CAD SR Content Tree” in PS3.17 .
Table TID 4100. Chest CAD Document Root
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$ImageLaterality = DCID 244 “Laterality” $ImageView = DCID 4010 “DX View” $ImageViewMod = DCID 4011 “DX View Modifier” |
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Shall be present unless the value of Row 6 = (111225, DCM, "Not Attempted") |
$DetectionCode = DCID 6101 “Chest Finding or Feature”, DCID 6102 “Chest Finding or Feature Modifier” |
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Shall be present unless the value of Row 8 = (111225, DCM, "Not Attempted") |
$AnalysisCode = DCID 6137 “CAD Analysis Type” |
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The "Image Library" section of the Content Tree (TID 4100 “Chest CAD Document Root”, 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. |
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The "Detections Performed" and "Analyses Performed" sections of the Content Tree (TID 4100 “Chest CAD Document Root”, 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. |