CP-1789Allow categorical observations without measurements for ROIs in TID 1500
Status
Final Text
Date of Last Update
2018/11/10
Person Assigned
David Clunie
Submitter Name
QIICR
Submission Date
2018/02/13
Correction Number CP-1789
Log Summary: Allow categorical observations without measurements for ROIs in TID 1500
Name of StandardPS3.16 2018d
Rationale for Correction:There are use cases for spatially locating ROIs and providing findings or categorical observations (qualitative evaluations) without measurements.Relax the requirement to always have measurements for planar and volumetric ROIs and other measurements in Measurement Reports, and rename the templates accordingly.
Correction Wording:
Amend DICOM PS3.16 as follows (changes to existing text are bold and underlined for additions and struckthrough for removals):
Planar ROI Measurements<emphasis role="bold"><emphasis role="underline"> and Qualitative Evaluations</emphasis></emphasis>This Template provides a general structure to report one or more measurements for some metric, e.g., density, flow, or concentration, and/or qualitative evaluations over a planar region of interest in an image. The ROI may be specified by an SCOORD on an image, or by a Segmentation Image.
Planar ROI Measurements
NL
Rel with Parent
VT
Concept Name
VM
Req Type
Condition
Value Set Constraint
1
CONTAINER
EV (125007, DCM, "Measurement Group")
1
M
...
...
...
...
...
5
>
CONTAINS
SCOORD
EV (111030, DCM, "Image Region")
1
MC
XOR Row 7
GRAPHIC TYPE = not {MULTIPOINT}
6
>>
SELECTED FROM
IMAGE
1
M
7
>
CONTAINS
IMAGE
EV (121214, DCM, "Referenced Segmentation Frame")
1
MC
XOR Row 5
Reference shall be to a Segmentation Image, with a single value specified in Referenced Frame Number, and with a single value specified in Referenced Segment Number
8
>
CONTAINS
IMAGE
EV (121233, DCM, "Source image for segmentation")
1
MC
IFF Row 7
9
>
CONTAINS
IMAGE
EV (121200, DCM, "Illustration of ROI")
1
U
10
>
CONTAINS
COMPOSITE
EV (126100, DCM, "Real World Value Map used for measurement")
1
U
SOP Class UID shall be Real World Value Mapping Storage ("1.2.840.10008.5.1.4.1.1.67")
To describe an infinitely small area, such as the center of a lesion, a Graphic Type of POINT may be used.
>...
...
Row 11
Measurements may be omitted, for example if it is desired to describe only the location of a finding or to provide categorical information about it.
Rows 12, 13
Allows encoding a flat list of name-value pairs that are coded questions with coded or text answers, for example, to record categorical observations related to the subject of the measurement group.
Volumetric ROI Measurements<emphasis role="bold"><emphasis role="underline"> and Qualitative Evaluations</emphasis></emphasis>This Template provides a general structure to report one or more measurements for some metric, e.g., density, flow, or concentration, and/or qualitative evaluations over a volumetric region of interest in a set of images or a Frame of Reference. The volumetric ROI may be specified by a set of SCOORDs on an image set representing a volume, by a volumetric Segmentation Image, by a volume defined in a Surface Segmentation, or by a SCOORD3D.
Volumetric ROI Measurements
NL
Rel with Parent
VT
Concept Name
VM
Req Type
Condition
Value Set Constraint
1
CONTAINER
EV (125007, DCM, "Measurement Group")
1
M
...
5
>
CONTAINS
SCOORD
EV (111030, DCM, "Image Region")
1-n
MC
XOR Rows 7, 10
GRAPHIC TYPE = not {MULTIPOINT}
6
>>
SELECTED FROM
IMAGE
1
M
7
>
CONTAINS
IMAGE
EV (121191, DCM, "Referenced Segment")
1
MC
XOR Rows 5, 10
Reference shall be to a Segmentation Image or Surface Segmentation object, with a single value specified in Referenced Segment Number
10
>
CONTAINS
SCOORD3D
EV (121231, DCM, "Volume Surface")
1
MC
XOR Rows 5, 7
GRAPHIC TYPE = {ELLIPSOID or POINT}
11
>
CONTAINS
IMAGE
EV (121233, DCM, "Source image for segmentation")
1-n
MC
XOR Row 12 and IFF (Row 7 or Row 10)
12
>
CONTAINS
UIDREF
EV (121232, DCM, "Source series for segmentation")
To describe an infinitely small volume, such as the center of a lesion, a Graphic Type of POINT may be used.
...
...
Row 15
Measurements may be omitted, for example if it is desired to describe only the location of a finding or to provide categorical information about it.
Rows 16, 17
Allows encoding a flat list of name-value pairs that are coded questions with coded or text answers, for example, to record categorical observations related to the subject of the measurement group.
Measurement<emphasis role="bold"><emphasis role="underline"> and Qualitative Evaluation</emphasis></emphasis> GroupThis Template groups Measurements and/or qualitative evaluations into a Measurement Group....