DICOM PS3.17 2019b - Explanatory Information

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.

Chest radiographs as Described in Example 3

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

DICOM PS3.17 2019b - Explanatory Information