CP-1388Add Real World Value Map Reference to Measurements
STATUS
Assigned
Date of Last Update
2014/05/28
Person Assigned
David Clunie
Submitter Name
Andriy Fedorov
Submission Date
2014/02/21
Correction Number CP-1388
Log Summary: Add Real World Value Map Reference to Measurements
Name of StandardPS3.16 2013
Rationale for Correction:Measurements on regions of interest may be made using separate Real World Value Maps applied to
stored pixel values in images, and it is useful to record a reference to which instance was used.These references may either be shared by an entire measurement group, or associated
with an individual measurement.
Correction Wording:
Amend DICOM PS3.16 - Content Mapping Resource - Structured
Reporting Templates to update the following templates to include an optional
reference to RWV Map instances:
Measurement...
Measurement
NL
Rel with Parent
VT
Concept Name
VM
Req Type
Condition
Value Set Constraint
1
NUM
$Measurement
1
M
UNITS = $Units
...
...
...
...
...
...
...
17
>
HAS OBS CONTEXT
INCLUDE
DTID 4108 "Tracking Identifier"
1
U
18
>
INFERRED FROM
COMPOSITE
EV (dd3001, 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")
Content Item Descriptions
...
...
Row 18
The reference to an RWV in
Row 18 allows measurements to be made in units that differ from the stored
pixel values in the images referenced in Row 13. E.g., for a PET SUVbw
measurement, the mapping from activity/concentration units in the referenced
image that was used (and which may be reused for measurements in the future)
may be encoded in a referenced RWV instance. This reference overrides any
reference in an including template (such as for a Measurement
Group).
Planar ROI Measurements...Type:ExtensibleOrder:Significant
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
...
...
...
...
...
...
...
...
8
>
CONTAINS
IMAGE
EV (121200, DCM, "Illustration of ROI")
1
U
9
>
CONTAINS
COMPOSITE
EV (dd3001, 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")
The reference to an RWV in
Row 9 allows measurements to be made in units that differ from the stored
pixel values in the images referenced elsewhere in the template. E.g., for a
PET SUVbw measurement, the mapping from activity/concentration units in the
referenced image that was used (and which may be reused for measurements in
the future) may be encoded in a referenced RWV instance. This reference
applies to any measurements in included templates, unless
overridden).
Volumetric ROI Measurements...Type:ExtensibleOrder:Significant
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
...
...
...
...
...
...
...
...
12
>
CONTAINS
IMAGE
EV (121200, DCM, "Illustration of ROI")
1-n
U
13
>
CONTAINS
COMPOSITE
EV (dd3001, 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")
The reference to an RWV in
Row 13 allows measurements to be made in units that differ from the stored
pixel values in the images referenced elsewhere in the template. E.g., for a
PET SUVbw measurement, the mapping from activity/concentration units in the
referenced image that was used (and which may be reused for measurements in
the future) may be encoded in a referenced RWV instance. This reference
applies to any measurements in included templates, unless
overridden).
ROI Measurements...
ROI Measurements
NL
Rel with Parent
VT
Concept Name
VM
Req Type
Condition
Value Set Constraint
1e
NUM
$Measurement
1-n
M
UNITS = $Units
...
...
...
...
...
...
...
...
14
>
HAS CONCEPT MOD
TEXT
(121050, DCM, "Equivalent Meaning of Concept Name")
1
U
15
>
INFERRED
FROM
COMPOSITE
EV (dd3001, 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")
Content Item Descriptions
...
...
Row 15
The reference to an RWV
in Row 18 allows measurements to be made in units that differ from the stored
pixel values in the images referenced in the parent template. E.g., for a PET
SUVbw measurement, the mapping from activity/concentration units in the
referenced image that was used (and which may be reused for measurements in
the future) may be encoded in a referenced RWV instance. This reference
overrides any reference in an including template (such as for a Measurement
Group).
Amend DICOM PS3.16 - Content Mapping Resource - Controlled
Terminology Definitions to add the following new concepts:
DICOM Controlled Terminology Definitions
Code Value
Code Meaning
Definition
Notes
...
...
...
...
dd3001
Real World Value Map used for measurement
A reference to the Real World Value Map applied to the stored image pixel values before their use for a measurement