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

SS.3.3 Example 3: Colon Polyp Detection, Temporal Differencing With Findings (Current)
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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

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