IEC TR 61852:1998
(Main)Medical electrical equipment - Digital imaging and communications in medicine (DICOM) - Radiotherapy objects
Medical electrical equipment - Digital imaging and communications in medicine (DICOM) - Radiotherapy objects
This report is supplement 11 to the DICOM standard. It defines a number of information objects applicable to the domain of radiation oncology. The intent of these objects is to support the transfer of radiotherapy-related data between devices found within and outside a radiotherapy department.
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TECHNICAL
IEC
REPORT
First edition
1998-04
Medical electrical equipment –
Digital imaging and communications
in medicine (DICOM) –
Radiotherapy objects
Reference number
IEC 61852:1998(E)
Numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series.
Consolidated publications
Consolidated versions of some IEC publications including amendments are
available. For example, edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the
base publication, the base publication incorporating amendment 1 and the base
publication incorporating amendments 1 and 2.
Validity of this publication
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology.
Information relating to the date of the reconfirmation of the publication is available
in the IEC catalogue.
Information on the subjects under consideration and work in progress undertaken by
the technical committee which has prepared this publication, as well as the list of
publications issued, is to be found at the following IEC sources:
• IEC web site*
• Catalogue of IEC publications
Published yearly with regular updates
(On-line catalogue)*
• IEC Bulletin
Available both at the IEC web site* and as a printed periodical
Terminology, graphical and letter
symbols
For general terminology, readers are referred to IEC 60050: International
Electrotechnical Vocabulary (IEV).
For graphical symbols, and letter symbols and signs approved by the IEC for
general use, readers are referred to publications IEC 60027: Letter symbols to be
used in electrical technology, IEC 60417: Graphical symbols for use on equipment.
Index, survey and compilation of the single sheets and IEC 60617: Graphical symbols
for diagrams.
* See web site address on title page.
TECHNICAL
IEC
REPORT – TYPE 3
First edition
1998-04
Medical electrical equipment –
Digital imaging and communications
in medicine (DICOM) –
Radiotherapy objects
IEC 1998 Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http: //www.iec.ch
Commission Electrotechnique Internationale
PRICE CODE
XC
International Electrotechnical Commission
For price, see current catalogue
– 2 – 61852 © IEC:1998(E)
CONTENTS
Page
FOREWORD . 3
INTRODUCTION . 5
Clause
Scope. 6
A.U RT IMAGE INFORMATION OBJECT DEFINITION . 11
A.U.1 RT Image IOD Description . 11
A.U.2 RT Image IOD entity-relationship model . 11
A.U.3 RT Image IOD Module Table . 12
A.V RT DOSE INFORMATION OBJECT DEFINITION. 13
A.V.1 RT Dose IOD Description . 13
A.V.2 RT dose IOD entity-relationship model . 13
A.V.3 RT dose IOD Module Table . 14
A.W RT STRUCTURE SET INFORMATION OBJECT DEFINITION . 14
A.W.1 RT structure set IOD description . 14
A.W.2 RT Structure Set IOD entity-relationship model. 15
A.W.3 RT Structure Set IOD Module Table . 15
A.X RT PLAN INFORMATION OBJECT DEFINITION. 16
A.X.1 RT Plan IOD Description . 16
A.X.2 RT Plan IOD entity-relationship model . 16
A.X.3 RT Plan IOD Module Table. 17
C.7.3.1.1.1 Modality. 18
C.8.X Radiotherapy. 18
C.8.X.1 RT Series Module. 18
C.8.X.2 RT Image Module . 20
C.8.X.3 RT Dose Module. 27
C.8.X.4 RT DVH Module . 31
C.8.X.5 Structure Set Module. 33
C.8.X.6 ROI Contour Module. 36
C.8.X.7 RT Dose ROI Module. 38
C.8.X.8 RT ROI Observations Module . 39
C.8.X.9 RT General Plan Module. 42
C.8.X.10 RT Prescription Module . 44
C.8.X.11 RT Tolerance Tables Module . 46
C.8.X.12 RT Patient Setup Module . 48
C.8.X.13 RT Fraction Scheme Module. 50
C.8.X.14 RT Beams Module . 54
C.8.X.15 RT Brachy Application Setups Module. 68
C.8.X.16 Approval Module. 78
Part 4 Addendum Radiotherapy Storage SOP Classes . 79
B.5 STANDARD SOP CLASSES . 79
Part 6 Addendum Radiotherapy Data Dictionary . 80
61852 © IEC:1998(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
–––––––––––
MEDICAL ELECTRICAL EQUIPMENT –
DIGITAL IMAGING AND COMMUNICATIONS IN MEDICINE (DICOM) –
RADIOTHERAPY OBJECTS
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization
for Standardization (ISO) in accordance with conditions determined by agreement between the two
organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
report of one of the following types:
• type 1, when the required support cannot be obtained for the publication of an
International Standard, despite repeated efforts;
• type 2, when the subject is still under technical development or where for any other
reason there is the future but no immediate possibility of an agreement on an International
Standard;
• type 3, when a technical committee has collected data of a different kind from that
which is normally published as an International Standard, for example "state of the art".
Technical reports of types 1 and 2 are subject to review within three years of publication to
decide whether they can be transformed into International Standards. Technical reports of
type 3 do not necessarily have to be reviewed until the data they provide are considered to be
no longer valid or useful.
IEC 61852, which is a technical report of type 3, has been prepared by subcommittee 62C:
Equipment for radiotherapy, nuclear medicine and radiation dosimetry, of IEC technical
committee 62: Electrical equipment in medical practice.
– 4 – 61852 © IEC:1998(E)
The text of this technical report is based on the following documents:
Committee draft Report on voting
62C/183/CDV 62C/201A/RVC
Full information on the voting for the approval of this technical report can be found in the report
on voting indicated in the above table.
This report has been developed in conjunction with IEC subcommittee 62C, CEN TC251 and
the AAPM.
ACR (the American College of Radiology) and NEMA (the National Electrical Manufacturers'
Association) formed a joint committee to develop a standard for digital imaging and
communications in medicine. This DICOM standard was developed according to the NEMA
Procedures.
This report is supplement 11 to the DICOM standard. It is an extension to Part 3, 4 and 6 of the
published DICOM standard which consists of the following parts:
Part 1 — Introduction and Overview
Part 2 — Conformance
Part 3 — Information Object Definitions
Part 4 — Service Class Specifications
Part 5 — Data Structures and Encoding
Part 6 — Data Dictionary
Part 7 — Message Exchange
Part 8 — Network Communication Support for Message Exchange
Part 9 — Point-to-Point Communication Support for Message Exchange
Part 10 — Media Storage and File Format
Part 11 — Media Storage Application Profiles
Part 12 — Media Formats and Physical Media
Part 13 — Print Management Point-to-Point Communication Support
These parts are independent but related documents. Their development level and approval
status may differ. Additional parts may be added to this multi-part standard. PS3.1 should be
used as the base reference for the current parts of this standard.
A bilingual version of this technical report may be issued at a later date.
61852 © IEC:1998(E) – 5 –
INTRODUCTION
This supplement to the DICOM Standard defines a number of information objects applicable to
the domain of radiation oncology. The intent of these objects is to support the transfer of
radiotherapy-related data between devices found within and outside a radiotherapy department.
They are not, however, intended to support the management of the transferred data, a function
which may be addressed in future revisions of the DICOM Standard.
This task of process management has not been addressed in the current draft due to the
absence of a consistent process model for a radiotherapy department, especially in an
international context. As a result, the radiotherapy information objects contain a large number
of conditional and optional data elements. Essentially the objects are intended to be used as
“containers” for related radiotherapy data, with data being added as the object flows through
the department.
– 6 – 61852 © IEC:1998(E)
MEDICAL ELECTRICAL EQUIPMENT –
DIGITAL IMAGING AND COMMUNICATIONS IN MEDICINE (DICOM) –
RADIOTHERAPY OBJECTS
The following text extends and/or amends Part 3 of DICOM.
Part 3: Addendum radiotherapy information object definitions
1 Scope
This report specifies the following information objects:
1) A DICOM Image Information Object for Radiotherapy. It specifies the semantic content of
RT Images. It is commonly abbreviated to the RT Image IOD. It also includes the
corresponding Storage SOP Class so that this IOD can be used in Network and Media
Storage exchanges. The scope of the RT Image IOD is radiotherapy images which have
been obtained on a conic imaging geometry, such as that found on conventional simulators
and portal imaging devices. It can also be used for calculated images using the same
geometry, such as digitally reconstructed radiographs (DRRs).
2) A DICOM Dose Information Object for Radiotherapy. It specifies the semantic content of RT
Doses. It is commonly abbreviated to the RT Dose IOD. It also includes the corresponding
Storage SOP Class so that this IOD can be used in Network and Media Storage exchanges.
The scope of the RT Dose IOD is radiotherapy dose distributions which have been
calculated on a radiotherapy treatment planning system, represented as two- or three-
dimensional dose grids, groups of named or unnamed dose points, isodose curves, and
dose-volume histograms (DVHs).
3) A DICOM Structure Set Information Object for Radiotherapy. It s
...
TECHNICAL
IEC
REPORT
First edition
1998-04
Medical electrical equipment –
Digital imaging and communications
in medicine (DICOM) –
Radiotherapy objects
Reference number
IEC 61852:1998(E)
Numbering
As from 1 January 1997 all IEC publications are issued with a designation in the
60000 series.
Consolidated publications
Consolidated versions of some IEC publications including amendments are
available. For example, edition numbers 1.0, 1.1 and 1.2 refer, respectively, to the
base publication, the base publication incorporating amendment 1 and the base
publication incorporating amendments 1 and 2.
Validity of this publication
The technical content of IEC publications is kept under constant review by the IEC,
thus ensuring that the content reflects current technology.
Information relating to the date of the reconfirmation of the publication is available
in the IEC catalogue.
Information on the subjects under consideration and work in progress undertaken by
the technical committee which has prepared this publication, as well as the list of
publications issued, is to be found at the following IEC sources:
• IEC web site*
• Catalogue of IEC publications
Published yearly with regular updates
(On-line catalogue)*
• IEC Bulletin
Available both at the IEC web site* and as a printed periodical
Terminology, graphical and letter
symbols
For general terminology, readers are referred to IEC 60050: International
Electrotechnical Vocabulary (IEV).
For graphical symbols, and letter symbols and signs approved by the IEC for
general use, readers are referred to publications IEC 60027: Letter symbols to be
used in electrical technology, IEC 60417: Graphical symbols for use on equipment.
Index, survey and compilation of the single sheets and IEC 60617: Graphical symbols
for diagrams.
* See web site address on title page.
TECHNICAL
IEC
REPORT – TYPE 3
First edition
1998-04
Medical electrical equipment –
Digital imaging and communications
in medicine (DICOM) –
Radiotherapy objects
IEC 1998 Copyright - all rights reserved
No part of this publication may be reproduced or utilized in any form or by any means, electronic or
mechanical, including photocopying and microfilm, without permission in writing from the publisher.
International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http: //www.iec.ch
Commission Electrotechnique Internationale
PRICE CODE
XC
International Electrotechnical Commission
For price, see current catalogue
– 2 – 61852 © IEC:1998(E)
CONTENTS
Page
FOREWORD . 3
INTRODUCTION . 5
Clause
Scope. 6
A.U RT IMAGE INFORMATION OBJECT DEFINITION . 11
A.U.1 RT Image IOD Description . 11
A.U.2 RT Image IOD entity-relationship model . 11
A.U.3 RT Image IOD Module Table . 12
A.V RT DOSE INFORMATION OBJECT DEFINITION. 13
A.V.1 RT Dose IOD Description . 13
A.V.2 RT dose IOD entity-relationship model . 13
A.V.3 RT dose IOD Module Table . 14
A.W RT STRUCTURE SET INFORMATION OBJECT DEFINITION . 14
A.W.1 RT structure set IOD description . 14
A.W.2 RT Structure Set IOD entity-relationship model. 15
A.W.3 RT Structure Set IOD Module Table . 15
A.X RT PLAN INFORMATION OBJECT DEFINITION. 16
A.X.1 RT Plan IOD Description . 16
A.X.2 RT Plan IOD entity-relationship model . 16
A.X.3 RT Plan IOD Module Table. 17
C.7.3.1.1.1 Modality. 18
C.8.X Radiotherapy. 18
C.8.X.1 RT Series Module. 18
C.8.X.2 RT Image Module . 20
C.8.X.3 RT Dose Module. 27
C.8.X.4 RT DVH Module . 31
C.8.X.5 Structure Set Module. 33
C.8.X.6 ROI Contour Module. 36
C.8.X.7 RT Dose ROI Module. 38
C.8.X.8 RT ROI Observations Module . 39
C.8.X.9 RT General Plan Module. 42
C.8.X.10 RT Prescription Module . 44
C.8.X.11 RT Tolerance Tables Module . 46
C.8.X.12 RT Patient Setup Module . 48
C.8.X.13 RT Fraction Scheme Module. 50
C.8.X.14 RT Beams Module . 54
C.8.X.15 RT Brachy Application Setups Module. 68
C.8.X.16 Approval Module. 78
Part 4 Addendum Radiotherapy Storage SOP Classes . 79
B.5 STANDARD SOP CLASSES . 79
Part 6 Addendum Radiotherapy Data Dictionary . 80
61852 © IEC:1998(E) – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
–––––––––––
MEDICAL ELECTRICAL EQUIPMENT –
DIGITAL IMAGING AND COMMUNICATIONS IN MEDICINE (DICOM) –
RADIOTHERAPY OBJECTS
FOREWORD
1) The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, the IEC publishes International Standards. Their preparation is
entrusted to technical committees; any IEC National Committee interested in the subject dealt with may
participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization
for Standardization (ISO) in accordance with conditions determined by agreement between the two
organizations.
2) The formal decisions or agreements of the IEC on technical matters express, as nearly as possible, an
international consensus of opinion on the relevant subjects since each technical committee has representation
from all interested National Committees.
3) The documents produced have the form of recommendations for international use and are published in the form
of standards, technical reports or guides and they are accepted by the National Committees in that sense.
4) In order to promote international unification, IEC National Committees undertake to apply IEC International
Standards transparently to the maximum extent possible in their national and regional standards. Any
divergence between the IEC Standard and the corresponding national or regional standard shall be clearly
indicated in the latter.
5) The IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with one of its standards.
6) Attention is drawn to the possibility that some of the elements of this International Standard may be the subject
of patent rights. The IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
report of one of the following types:
• type 1, when the required support cannot be obtained for the publication of an
International Standard, despite repeated efforts;
• type 2, when the subject is still under technical development or where for any other
reason there is the future but no immediate possibility of an agreement on an International
Standard;
• type 3, when a technical committee has collected data of a different kind from that
which is normally published as an International Standard, for example "state of the art".
Technical reports of types 1 and 2 are subject to review within three years of publication to
decide whether they can be transformed into International Standards. Technical reports of
type 3 do not necessarily have to be reviewed until the data they provide are considered to be
no longer valid or useful.
IEC 61852, which is a technical report of type 3, has been prepared by subcommittee 62C:
Equipment for radiotherapy, nuclear medicine and radiation dosimetry, of IEC technical
committee 62: Electrical equipment in medical practice.
– 4 – 61852 © IEC:1998(E)
The text of this technical report is based on the following documents:
Committee draft Report on voting
62C/183/CDV 62C/201A/RVC
Full information on the voting for the approval of this technical report can be found in the report
on voting indicated in the above table.
This report has been developed in conjunction with IEC subcommittee 62C, CEN TC251 and
the AAPM.
ACR (the American College of Radiology) and NEMA (the National Electrical Manufacturers'
Association) formed a joint committee to develop a standard for digital imaging and
communications in medicine. This DICOM standard was developed according to the NEMA
Procedures.
This report is supplement 11 to the DICOM standard. It is an extension to Part 3, 4 and 6 of the
published DICOM standard which consists of the following parts:
Part 1 — Introduction and Overview
Part 2 — Conformance
Part 3 — Information Object Definitions
Part 4 — Service Class Specifications
Part 5 — Data Structures and Encoding
Part 6 — Data Dictionary
Part 7 — Message Exchange
Part 8 — Network Communication Support for Message Exchange
Part 9 — Point-to-Point Communication Support for Message Exchange
Part 10 — Media Storage and File Format
Part 11 — Media Storage Application Profiles
Part 12 — Media Formats and Physical Media
Part 13 — Print Management Point-to-Point Communication Support
These parts are independent but related documents. Their development level and approval
status may differ. Additional parts may be added to this multi-part standard. PS3.1 should be
used as the base reference for the current parts of this standard.
A bilingual version of this technical report may be issued at a later date.
61852 © IEC:1998(E) – 5 –
INTRODUCTION
This supplement to the DICOM Standard defines a number of information objects applicable to
the domain of radiation oncology. The intent of these objects is to support the transfer of
radiotherapy-related data between devices found within and outside a radiotherapy department.
They are not, however, intended to support the management of the transferred data, a function
which may be addressed in future revisions of the DICOM Standard.
This task of process management has not been addressed in the current draft due to the
absence of a consistent process model for a radiotherapy department, especially in an
international context. As a result, the radiotherapy information objects contain a large number
of conditional and optional data elements. Essentially the objects are intended to be used as
“containers” for related radiotherapy data, with data being added as the object flows through
the department.
– 6 – 61852 © IEC:1998(E)
MEDICAL ELECTRICAL EQUIPMENT –
DIGITAL IMAGING AND COMMUNICATIONS IN MEDICINE (DICOM) –
RADIOTHERAPY OBJECTS
The following text extends and/or amends Part 3 of DICOM.
Part 3: Addendum radiotherapy information object definitions
1 Scope
This report specifies the following information objects:
1) A DICOM Image Information Object for Radiotherapy. It specifies the semantic content of
RT Images. It is commonly abbreviated to the RT Image IOD. It also includes the
corresponding Storage SOP Class so that this IOD can be used in Network and Media
Storage exchanges. The scope of the RT Image IOD is radiotherapy images which have
been obtained on a conic imaging geometry, such as that found on conventional simulators
and portal imaging devices. It can also be used for calculated images using the same
geometry, such as digitally reconstructed radiographs (DRRs).
2) A DICOM Dose Information Object for Radiotherapy. It specifies the semantic content of RT
Doses. It is commonly abbreviated to the RT Dose IOD. It also includes the corresponding
Storage SOP Class so that this IOD can be used in Network and Media Storage exchanges.
The scope of the RT Dose IOD is radiotherapy dose distributions which have been
calculated on a radiotherapy treatment planning system, represen
...
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