DICOM PS3.17 2021e - Explanatory Information

RRR.5 Measurement Report SR Document Volumetric ROI with RECIST Linear Distance Specified by Coordinates on CT Example

This CT example describes a set of measurements (volume, long axis (RECIST), short axis (WHO bi-dimensional) and mean attenuation coefficient) made from a single volumetric ROI encoded as a single segment, including specification of the end points of the line segment used to make the linear distance measurements.

Note

  1. The lengths of the long axis and the short axis of the lesion are not encoded as characteristics of the volumetric ROI, but rather the long axis and the short axis are encoded explicitly as the end points of line segments used to make those measurements. The commonality of the Tracking Unique Identifier establishes that they are measurements of the same ROI. If multiple measurements were to be made of the same ROI over time or by different observers, other content items such as those related to Timepoint, Activity Session and Observer may be used. For an alternative encoding, see Section RRR.2.

  2. The pattern of using multiple sibling linear distance measurements within TID 1419 “ROI Measurements” is similar to and not incompatible with the pattern used for length, width and height in the OB/GYN Ultrasound template TID 5016 “LWH Volume Group”.

  3. The Finding Site information is duplicated in the second measurement template invocation in this example, though it is not required to be.

Table RRR.5-1. Volumetric ROI on CT Example

Node

Code Meaning of Concept Name

Code Meaning or Example Value

TID

1

Oncology Measurement Report

TID 1500

...

...

...

...

1.5

Measurements

TID 1500

1.5.1

Measurement Group

TID 1411

1.5.1.1

Tracking Identifier

Object1 (same for both Measurement Groups)

TID 1411

1.5.1.2

Tracking Unique Identifier

1.2.276.0.7230010... (same for both Measurement Groups)

TID 1411

1.5.1.3

Referenced Segment

IMAGE - Segmentation, Segment #1

TID 1411

1.5.1.4

Source image for segmentation

IMAGE - CT image #1

TID 1411

1.5.1.5

Source image for segmentation

IMAGE - CT image #2

TID 1411

1.5.1.6

Finding Site

Adrenal Gland (same for both Measurement Groups)

TID 1419

1.5.1.6.1

Laterality

Right (same for both Measurement Groups)

TID 1419

1.5.1.7

Volume

3267.46 mm3

TID 1419

1.5.1.7.1

Measurement Method

Sum of segmented voxel volumes

TID 1419

CID 7474

1.5.1.8

Attenuation Coefficient

70.978 Hounsfield unit

TID 1419

1.5.1.8.1

Derivation

Mean

TID 1419

CID 7464

1.6.1

Measurement Group

TID 1501

1.6.1.1

Tracking Identifier

Object1 (same for both Measurement Groups)

TID 1501

1.6.1.2

Tracking Unique Identifier

1.2.276.0.7230010... (same for both Measurement Groups)

TID 1501

1.6.1.3

Finding Site

Adrenal Gland (same for both Measurement Groups)

TID 1501

1.6.1.3.1

Laterality

Right (same for both Measurement Groups)

TID 1501

1.6.1.4

Long Axis

9.21 mm

TID 300

CID 7470

1.6.1.4.1

Measurement Method

RECIST 1.1

TID 300

CID 6147

1.6.1.4.2

Source of Measurement

SCOORD GraphicType POLYLINE with two coordinates, the beginning and end of a line segment

TID 320

CID 7470

1.6.1.4.2.1

(none)

IMAGE - CT image #1

TID 320

1.6.1.5

Short Axis

6.8 mm

TID 300

CID 7470

1.6.1.5.1

Measurement Method

WHO

TID 300

CID 6147

1.6.1.5.2

Source of Measurement

SCOORD GraphicType POLYLINE with two coordinates, the beginning and end of a line segment

TID 320

CID 7470

1.6.1.5.2.1

(none)

IMAGE - CT image #1

TID 320


DICOM PS3.17 2021e - Explanatory Information