SS.3 Colon CAD SR Examples
Prev | SS Colon CAD (Informative) | Next

## SS.3 Colon CAD SR Examples

The following is a simple and non-comprehensive illustration of an encoding of the Colon CAD SR IOD for colon computer aided detection results. For brevity, some mandatory content items are not included.

### SS.3.1 Example 1: Colon Polyp Detection With No Findings

A colon CAD device processes a typical screening colon case, i.e., there are several hundred images and no polyp findings. Colon CAD runs polyp detection successfully and finds nothing.

The colon radiograph resembles:

Figure SS.3-1. Colon Radiograph as Described in Example 1

The content tree structure would resemble:

Node | Code Meaning of Concept Name | Code Meaning or Example Value | TID
--- | --- | --- | ---
1 | Colon CAD Report |  | TID 4120
1.1 | Language of Content Item and Descendants | English | TID 1204
1.2 | Image Set Properties |  | TID 4122
1.2.1 | Frame of Reference UID | 1.2.840.114191.123 | TID 4122
1.2.2 | Study Instance UID | 1.2.840.114191.456 | TID 4122
1.2.3 | Study Date | 20060924 | TID 4122
1.2.4 | Study Time | 090807 | TID 4122
1.2.5 | Modality | CT | TID 4122
1.2.6 | Horizontal Pixel Spacing | 0.80 mm | TID 4122
1.2.7 | Vertical Pixel Spacing | 0.80 mm | TID 4122
1.2.8 | Slice Thickness | 2.5 mm | TID 4122
1.2.9 | Spacing between slices | 1.5 mm | TID 4122
1.2.10 | Recumbent Patient Position with respect to gravity | Prone | TID 4122
1.3 | CAD Processing and Findings Summary | All algorithms succeeded; without findings | TID 4121
1.4 | Summary of Detections | Succeeded | TID 4120
1.4.1 | Successful Detections |  | TID 4015
1.4.1.1 | Detection Performed | Nodule | TID 4017
1.4.1.1.1 | Algorithm Name | "Colon Polyp Detector" | TID 4019
1.4.1.1.2 | Algorithm Version | "V1.3" | TID 4019
1.4.1.1.3 | Series Instance UID | 1.2.840.114191.789 | TID 4017
1.5 | Summary of Analyses | Not Attempted | TID 4120

### 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:

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.

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 |  | TID 4120
1.1 | Language of Content Item and Descendants | English | TID 1204
1.2 | Image Set Properties |  | TID 4122
1.3 | CAD Processing and Findings Summary | All algorithms succeeded; with findings | TID 4121
1.4 | Summary of Detections | Succeeded | TID 4120
1.5 | Summary of Analyses | Not Attempted | TID 4120

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

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 | TID 4121
1.3.1 | Composite Feature | Polyp | TID 4125
1.3.1.1 | Rendering Intent | Presentation Required:… | TID 4125
1.3.1.2 | Algorithm Name | "Colon Polyp Detector" | TID 4019
1.3.1.3 | Algorithm Version | "V1.3" | TID 4019
1.3.1.4 | Composite Type | Target content items are related spatially | TID 4126
1.3.1.5 | Scope of Feature | Feature detected on multiple images | TID 4126
1.3.1.6 | Center | SCOORD3D POINT | TID 4129
1.3.1.7 | Outline | SCOORD3D ELLIPSOID | TID 4129
1.3.1.8 | Associated Morphology | Pedunculated | TID 4128
1.3.1.9 | Diameter | 20 mm | TID 1406
1.3.1.9.1 | Path | SCOORD3D POLYLINE | TID 1406

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 | TID 4120
1.4.1 | Successful Detections |  | TID 4015
1.4.1.1 | Detection Performed | Polyp | TID 4017
1.4.1.1.1 | Algorithm Name | "Colon Polyp Detector" | TID 4019
1.4.1.1.2 | Algorithm Version | "V1.3" | TID 4019
1.4.1.1.3 | Series Instance UID | 1.2.840.114191.111222 | TID 4017

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

### SS.3.3 Example 3: Colon Polyp Detection, Temporal Differencing With Findings

The patient in Example 2 returns for another colon radiograph. A more comprehensive colon CAD device processes the current colon radiograph, and analyses are performed that determine some temporally related content items for Composite Features. Portions of the prior colon CAD report (Example 2) are incorporated into this report. In the current colon radiograph the colon polyp has increased in size.

Figure SS.3-7. Colon radiographs as Described in Example 3

Node | Code Meaning of Concept Name | Code Meaning or Example Value | TID
--- | --- | --- | ---
1 | Colon CAD Report |  | TID 4120
1.1 | Language of Content Item and Descendants | English | TID 1204
1.2 | Image Set Properties |  | TID 4122
1.2.1 | Frame of Reference UID | 1.2.840.114191.5577 | TID 4122
1.2.2 | Study Instance UID | 1.2.840.114191.7788 | TID 4122
1.2.3 | Study Date | 20080924 | TID 4122
1.2.4 | Study Time | 101827 | TID 4122
1.2.5 | Modality | CT | TID 4122
1.2.6 | Horizontal Pixel Spacing | 0.80 mm | TID 4122
1.2.7 | Vertical Pixel Spacing | 0.80 mm | TID 4122
1.2.8 | Slice Thickness | 2.5 mm | TID 4122
1.2.9 | Spacing between slices | 1.5 mm | TID 4122
1.2.10 | Recumbent Patient Position with respect to gravity | Prone | TID 4122
1.3 | Image Set Properties |  | TID 4122
1.3.1 | Frame of Reference UID | 1.2.840.114191.1122 | TID 4122
1.3.2 | Study Instance UID | 1.2.840.114191.3344 | TID 4122
1.3.3 | Study Date | 20070924 | TID 4122
1.3.4 | Study Time | 090807 | TID 4122
1.3.5 | Modality | CT | TID 4122
1.3.6 | Horizontal Pixel Spacing | 0.80 mm | TID 4122
1.3.7 | Vertical Pixel Spacing | 0.80 mm | TID 4122
1.3.8 | Slice Thickness | 2.5 mm | TID 4122
1.3.9 | Spacing between slices | 1.5 mm | TID 4122
1.3.10 | Recumbent Patient Position with respect to gravity | Prone | TID 4122

The CAD processing and findings consist of one composite feature, comprised of single image findings, one from each year. The temporal relationship allows a quantitative temporal difference to be calculated:

Node | Code Meaning of Concept Name | Code Meaning or Example Value | TID
--- | --- | --- | ---
1.4 | CAD Processing and Findings Summary | All algorithms succeeded; with findings | TID 4121
1.4.1 | Composite Feature | Polyp | TID 4125
1.4.1.1 | Rendering Intent | Presentation Required: … | TID 4125
1.4.1.2 | Algorithm Name | "Polyp Change" | TID 4019
1.4.1.3 | Algorithm Version | "V2.3" | TID 4019
1.4.1.4 | Composite Type | Target content items are related temporally | TID 4126
1.4.1.5 | Scope of Feature | Feature detected on multiple images | TID 4126
1.4.1.6 | Certainty of Feature | 85% | TID 4126
1.4.1.7 | Associated Morphology | Pedunculated | TID 4128
1.4.1.8 | Difference in size | 2 mm | TID 4126
1.4.1.8.1 |  | Reference to Node 1.4.1.9.10 | TID 4126
1.4.1.8.2 |  | Reference to Node 1.4.1.10.10 | TID 4126
1.4.1.9 | Composite Feature | Polyp | TID 4125
1.4.1.9.1 | Rendering Intent | Presentation Required: … | TID 4125
1.4.1.9.2 | Tracking Identifier | "Watchlist #1" | TID 4108
1.4.1.9.3 | Algorithm Name | "Colon Polyp Detector" | TID 4019
1.4.1.9.4 | Algorithm Version | "V1.3" | TID 4019
1.4.1.9.5 | Composite Type | Target content items are related spatially | TID 4126
1.4.1.9.6 | Scope of Feature | Feature detected on multiple images | TID 4126
1.4.1.9.7 | Center | SCOORD3D POINT | TID 4129
1.4.1.9.8 | Outline | SCOORD3D ELLIPSE | TID 4129
1.4.1.9.9 | Associated Morphology | Pedunculated | TID 4128
1.4.1.9.10 | Diameter | 4 mm | TID 1406
1.4.1.9.10.1 | Path | SCOORD3D POLYLINE | TID 1406
1.4.1.10 | Composite Feature | Polyp | TID 4125
1.4.1.10.1 | Rendering Intent | Presentation Required: … | TID 4125
1.4.1.10.2 | [Observation Context content items] |  | TID 4022
1.4.1.10.3 | Algorithm Name | "Colon Polyp Detector" | TID 4019
1.4.1.10.4 | Algorithm Version | "V1.3" | TID 4019
1.4.1.10.5 | Composite Type | Target content items are related spatially | TID 4126
1.4.1.10.6 | Scope of Feature | Feature detected on multiple images | TID 4126
1.4.1.10.7 | Center | SCOORD3D POINT | TID 4129
1.4.1.10.8 | Outline | SCOORD3D ELLIPSE | TID 4129
1.4.1.10.9 | Associated Morphology | Pedunculated | TID 4128
1.4.1.10.10 | Diameter | 2 mm | TID 1406
1.4.1.10.10.1 | Path | SCOORD3D POLYLINE | TID 1406
1.5 | Summary of Detections | Succeeded | TID 4120
1.5.1 | Successful Detections |  | TID 4015
1.5.1.1 | Detection Performed | Polyp | TID 4017
1.5.1.1.1 | Algorithm Name | "Colon Polyp Detector" | TID 4019
1.5.1.1.2 | Algorithm Version | "V1.3" | TID 4019
1.5.1.1.3 | Series Instance UID | 1.2.840.114191.555666 | TID 4017
1.6 | Summary of Analyses | Succeeded | TID 4120
1.6.1 | Successful Analyses |  | TID 4016
1.6.1.1 | Analysis Performed | "Temporal correlation" | TID 4018
1.6.1.1.1 | Algorithm Name | "Polyp Change" | TID 4019
1.6.1.1.2 | Algorithm Version | "V2.3" | TID 4019
1.6.1.1.3 | Series Instance UID | 1.2.840.114191.111222 | TID 4018
1.6.1.1.4 | Series Instance UID | 1.2.840.114191.555666 | TID 4018

Prev | Up | Next
SS.2 Colon CAD SR Observation Context Encoding | Home | TT Stress Testing Report Template (Informative)