DICOM PS3.17 2020b - Explanatory Information

F.3.3 Example 3: Lung Nodule Detection, Temporal Differencing With Findings (Current)
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### F.3.3 Example 3: Lung Nodule Detection, Temporal Differencing With Findings

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

Figure F.3-8. Chest radiographs as Described in Example 3

Italicized entries (xxx) in the following table denote references to or by-value inclusion of content tree items reused from the prior Chest CAD SR instance (Example 2).

Node | Code Meaning of Concept Name | Code Meaning or Example Value | TID
--- | --- | --- | ---
1 | Chest CAD Report |  | TID 4100

While the Image Library contains references to content tree items reused from the prior Chest CAD SR instance, the images are actually used in the chest CAD analysis and are therefore not italicized as indicated above.

Node | Code Meaning of Concept Name | Code Meaning or Example Value | TID
--- | --- | --- | ---
1.1 | Image Library |  | TID 4100
1.1.1 |  | IMAGE 1 | TID 4020
1.1.1.1 | Image View | Postero-anterior | TID 4020
1.1.1.2 | Study Date | 20000101 | TID 4020
1.1.2 |  | IMAGE 2 | TID 4020
1.1.2.1 | Image View | Postero-anterior | TID 4020
1.1.2.2 | Study Date | 19990101 | TID 4020

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
--- | --- | --- | ---
1.2 | CAD Processing and Findings Summary | All algorithms succeeded; with findings | TID 4101
1.2.1 | Composite Feature | Abnormal Opacity | TID 4102
1.2.1.1 | Composite Feature Modifier | Nodule | TID 4102
1.2.1.2 | Rendering Intent | Presentation Required: … | TID 4102
1.2.1.3 | Algorithm Name | "Nodule Change" | TID 4019
1.2.1.4 | Algorithm Version | "V2.3" | TID 4019
1.2.1.5 | Composite Type | Target content items are related temporally | TID 4103
1.2.1.6 | Scope of Feature | Feature detected on multiple images | TID 4103
1.2.1.7 | Certainty of Feature | 85% | TID 4103
1.2.1.8 | Difference in size | 2 cm | TID 4103
1.2.1.8.1 |  | Reference to Node 1.2.1.9.8 | TID 4103
1.2.1.8.2 |  | Reference to Node 1.2.1.10.8 | TID 4103
1.2.1.9 | Single Image Finding | Abnormal Opacity | TID 4104
1.2.1.9.1 | Single Image Finding Modifier | Nodule | TID 4104
1.2.1.9.2 | Rendering Intent | Presentation Required: … | TID 4104
1.2.1.9.3 | Tracking Identifier | "Watchlist #1" | TID 4108
1.2.1.9.4 | Algorithm Name | "Lung Nodule Detector" | TID 4019
1.2.1.9.5 | Algorithm Version | "V1.3" | TID 4019
1.2.1.9.6 | Center | POINT | TID 4107
1.2.1.9.6.1 |  | Reference to Node 1.1.1 | TID 4107
1.2.1.9.7 | Outline | POLYLINE | TID 4107
1.2.1.9.7.1 |  | Reference to Node 1.1.1 | TID 4107
1.2.1.9.8 | Diameter | 4 cm | TID 1400
1.2.1.9.8.1 | Path | POLYLINE | TID 1400
1.2.1.9.8.1.1 |  | Reference to Node 1.1.1 | TID 1400
1.2.1.10 | Single Image Finding | Abnormal Opacity | TID 4104
1.2.1.10.1 | Single Image Finding Modifier | Nodule | TID 4104
1.2.1.10.2 | Rendering Intent | Presentation Required: … | TID 4104
1.2.1.10.3 | [Observation Context content items] |  | TID 4022
1.2.1.10.4 | Algorithm Name | "Lung Nodule Detector" | TID 4019
1.2.1.10.5 | Algorithm Version | "V1.3" | TID 4019
1.2.1.10.6 | Center | POINT | TID 4107
1.2.1.10.6.1 |  | Reference to Node 1.1.2 | TID 4107
1.2.1.10.7 | Outline | POLYLINE | TID 4107
1.2.1.10.7.1 |  | Reference to Node 1.1.2 | TID 4107
1.2.1.10.8 | Diameter | 2 cm | TID 1400
1.2.1.10.8.1 | Path | POLYLINE | TID 1400
1.2.1.10.8.1.1 |  | Reference to Node 1.1.2 | TID 1400
1.3 | Summary of Detections | Succeeded | TID 4100
1.3.1 | Successful Detections |  | TID 4015
1.3.1.1 | Detection Performed | Nodule | TID 4017
1.3.1.1.1 | Algorithm Name | "Lung Nodule Detector" | TID 4019
1.3.1.1.2 | Algorithm Version | "V1.3" | TID 4019
1.3.1.1.3 |  | Reference to node 1.1.1 | TID 4017
1.4 | Summary of Analyses | Succeeded | TID 4100
1.4.1 | Successful Analyses |  | TID 4016
1.4.1.1 | Analysis Performed | "Temporal correlation" | TID 4018
1.4.1.1.1 | Algorithm Name | "Nodule Change" | TID 4019
1.4.1.1.2 | Algorithm Version | "V2.3" | TID 4019
1.4.1.1.3 |  | Reference to node 1.1.1 | TID 4018
1.4.1.1.4 |  | Reference to node 1.1.2 | TID 4018

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F.3.2 Example 2: Lung Nodule Detection With Findings and Anatomy/pathology Interpretation | Home | F.3.4 Example 4: Lung Nodule Detection in Chest Radiograph, Spatially Correlated With CT

DICOM PS3.17 2020b - Explanatory Information