DICOM PS3.17 2019a - Explanatory Information

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.

Colon radiographs as Described in Example 3

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

DICOM PS3.17 2019a - Explanatory Information