SS.3.2 Example 2: Colon Polyp Detection with Findings

A colon CAD device processes a screening colon case with several hundred images, and a colon polyp detected. The colon radiograph resembles:

Colon CT Slice [pic] Slice 103 [pic] Slice 104 [pic] Slice 105

Figure SS.3-2: Colon radiograph as Described in Example 2

The content tree structure in this example is complex. Structural illustrations of portions of the content tree are placed within the content tree table to show the relationships of data within the tree. Some content items are duplicated (and shown in boldface) to facilitate use of the diagrams.

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Figure SS.3-3: Content Tree Root of Example 2 Content Tree

The content tree structure would resemble:

Node Code Meaning of Concept Name Code Meaning or Example Value TID
1 Colon CAD Report 4120
1.1 Language of Content Item and Descendants English 1204
1.2 Image Set Properties 4122
1.3 CAD Processing and Findings Summary All algorithms succeeded; with findings 4121
1.4 Summary of Detections Succeeded 4120
1.5 Summary of Analyses Not Attempted 4120

Node Code Meaning of Concept Name Code Meaning or Example Value TID
1.2 Image Set Properties 4122
1.2.1 Frame of Reference UID 1.2.840.114191.1122 4122
1.2.2 Study Instance UID 1.2.840.114191.3344 4122
1.2.3 Study Date 20070924 4122
1.2.4 Study Time 090807 4122
1.2.5 Modality CT 4122
1.2.6 Horizontal Pixel Spacing 0.80 mm 4122
1.2.7 Vertical Pixel Spacing 0.80 mm 4122
1.2.8 Slice Thickness 2.5 mm 4122
1.2.9 Spacing between slices 1.5 mm 4122
1.2.10 Recumbent Patient Position with respect to gravity Prone 4122

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Figure SS.3-4: CAD Processing and Findings Summary Portion of Example 2 Content Tree

Node Code Meaning of Concept Name Code Meaning or Example Value TID
1.3 CAD Processing and Findings Summary All algorithms succeeded; with findings 4121
1.3.1 Composite Feature Polyp 4125
1.3.1.1 Rendering Intent Presentation Required:… 4125
1.3.1.2 Algorithm Name “Colon Polyp Detector” 4019
1.3.1.3 Algorithm Version “V1.3 4019
1.3.1.4 Composite Type Target content items are related spatially 4126
1.3.1.5 Scope of Feature Feature detected on multiple images 4126
1.3.1.6 Center SCOORD3D POINT 4129
1.3.1.7 Outline SCOORD3D ELLIPSOID 4129
1.3.1.8 Associated Morphology Pedunculated 4128
1.3.1.9 Diameter 20 mm 1406
1.3.1.9.1 Path SCOORD3D POLYLINE 1406

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Figure SS.3-5: Summary of Detections Portion of Example 2 Content Tree

Node Code Meaning of Concept Name Code Meaning or Example Value TID
1.4 Summary of Detections Succeeded 4120
1.4.1 Successful Detections 4015
1.4.1.1 Detection Performed Polyp 4017
1.4.1.1.1 Algorithm Name “Colon Polyp Detector” 4019
1.4.1.1.2 Algorithm Version “V1.3 4019
1.4.1.1.3 Series Instance UID 1.2.840.114191.111222 4017

Node Code Meaning of Concept Name Code Meaning or Example Value TID
1.5 Summary of Analyses Not Attempted 4120