BS-EN-61217-1996-A2-2008 IEC-61217-1996.pdf

BRITISH STANDARD BS EN 61217:1996 +A2:2008 Radiotherapy equipment Coordinates, movements and scales ICS 11.040.50; 13.280 ? Licensed Copy: London South Bank University, South Bank University, 16/11/2008 11:49, Uncontrolled Copy, (c) BSI BS EN 61217:1996+A2:2008 This British Standard was published under the authority of the Standards Board and comes into effect on 15 June 1997 © BSI 2008 ISBN 978 0 580 64267 8 National foreword This British Standard is the UK implementation of EN 61217:1996+A2:2008. It is identical with IEC 61217:1996, incorporating amendment 2:2007. It supersedes BS EN 61217:1996+A1:2001 which will be withdrawn on 1 February 2011. The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to IEC text carry the number of the IEC amendment. For example, text altered by IEC amendment 1 is indicated by !“. The UK participation in its preparation was entrusted by Technical Committee CH/62, Electromedical equipment in medical practice, to Subcommittee CH/62/3, Equipment for radiotherapy, nuclear medicine and radiation dosimetry. A list of organizations represented on this subcommittee can be obtained on request to its secretary. A Rationale for the changes in the IEC scale is given in Annex C. It is considered that a knowledge of the reasons for the changes will not only facilitate the proper application of the standard, but will expedite any subsequent revision. This annex does not form a normative part of the standard. Textual errors. When implementing the English language version of EN 61217 as the national standard, the textual errors listed below were discovered. They have been reported to the European Committee for Electrotechnical Standardization (CENELEC) in a proposal to amend the text of the European Standard. In Figure 16i, the entry in the column headed Edge X1 against element 06 should read “05,5” and not “05,0”. In the row in Figure 16k, the second “05” should be “06”. In Figure 16k the column headings “Size FX”, “Edge X1” and “Edge X2” should be “Size FY”, “Edge Y1” and “Edge Y2” respectively. In Figure 16k, the entry in the column headed Edge Y2 against element 06 should read “+5,5” and not “05,5”. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments/corrigenda issued since publication Amd. No. DateComments 1333115 February 2002See national foreword Implementation of IEC amendment 2:2007 with CENELEC endorsement A2:2008, and alignment of BSI and CENELEC publication dates 30 September 2008 Licensed Copy: London South Bank University, South Bank University, 16/11/2008 11:49, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÈENNE EUROPÄISCHE NORM EN 61217:1996+A2 February 2008 ICS 11.040.50; 13.280 Descriptors: Electromedical equipment, radiotherapy, movements, scales English version Radiotherapy equipment Co-ordinates, movements and scales (IEC 61217:1996) Appareils utilisés en radiothérapie Coordonnées, mouvements et échelles (CEI 61217:1996) Strahlentherapie-Einrichtungen Koordinaten, Bewegungen und Skalen (IEC 61217:1996) This European Standard was approved by CENELEC on 1996-07-02. members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of anational standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CENELEC member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members are the national electrotechnical committees of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CENELEC European Committee for Electrotechnical Standardization Comité Européen de Normalisation Electrotechnique Europäisches Komitee für Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B-1050 Brussels © 1996 Copyright reserved to CENELEC members Ref. No. EN 61217:1996 E CENELEC Licensed Copy: London South Bank University, South Bank University, 16/11/2008 11:49, Uncontrolled Copy, (c) BSI 2 Foreword The text of document 62C/143/FDIS, future edition 1 of IEC 1217, prepared by SC 62C, Equipment for radiotherapy, nuclear medicine and radiation dosimetry, of IEC TC 62, Electrical equipment in medical practice, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as EN 61217 on 1996-07-02. The following dates were fixed: Endorsement notice The text of the International Standard IEC 1217:1996 was approved by CENELEC as a European Standard without any modification. Foreword to amendment A1 The text of document 62C/279/FDIS, future amendment 1 to IEC 61217:1996, prepared by SC 62C, Equipment for radiotherapy, nuclear medicine and radiation dosimetry, of IEC TC 62, Electrical equipment in medical practice, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as amendment A1 to EN 61217:1996 on 2000-12-01. The following dates were fixed: Endorsement notice The text of amendment 1:2000 to the International Standard IEC 61217:1996 was approved by CENELEC as an amendment to the European Standard without any modification. latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 1997-05-01 latest date by which the national standards conflicting with the EN have to be withdrawn(dow) 1997-05-01 latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement(dop) 2001-09-01 latest date by which the national standards conflicting with the amendment have to be withdrawn(dow) 2003-12-01 Foreword to amendment A2 The text of document 62C/418/CDV, future amendment 2 to IEC 61217:1996, prepared by SC 62C, Equipment for radiotherapy, nuclear medicine and radiation dosimetry, of IEC TC 62, Electrical equipment in medical practice, was submitted to the IEC-CENELEC parallel Unique Acceptance Procedure and was approved by CENELEC as amendment A2 to EN 61217:1996 on 2008-02-01. The following dates were fixed: latest date by which the amendment has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2008-11-01 latest date by which the national standards conflicting with the amendment have to be withdrawn (dow) 2011-02-01 _ Endorsement notice The text of amendment 2:2007 to the International Standard IEC 61217:1996 was approved by CENELEC as an amendment to the European Standard without any modification. _ © BSI 2008 BS EN 61217:1996+A2:2008 Licensed Copy: London South Bank University, South Bank University, 16/11/2008 11:49, Uncontrolled Copy, (c) BSI 3 Page Annex D (informative) Summary of additions and changes to scale statements in IEC 601-2-1, IEC 601-2-11, IEC 976 and IEC 977 Annex E (informative) Terminology Annex F (informative) Coordinate transformations between IEC and DICOM PATIENT coordinates Figure 1a Coordinate systems (see 2.1.2) with all angular positions set to zero18 Figure 1b Translation of origin Id along Xm, Ym, Zm and rotation around axis Zd parallel to Zm (see 2.1.4)19 Figure 1c Translation of origin Id along Xm, Ym, Zm and rotation around axis Yd parallel to Ym (see 2.1.4)19 Figure 2 X Y Z right-hand coordinate mother system (isometric drawing), showing ?, ?, ? directions of positive rotation for daughter system (see 2.2)20 Figure 3 Hierarchical structure among coordinate systems (see 2.1.3 and 2.1.5)21 Figure 4 Rotation (?g = 15?) of GANTRY coordinate system Xg, Yg, Zg in fixed coordinate system Xf, Yf, Zf (see 2.3)22 Figure 5 Rotation (?b = 15?) of BEAM LIMITING DEVICE or DELINEATOR coordinate system Xb, Yb, Zb in GANTRY coordinate system Xg, Yg, Zg and resultant rotation of RADIATION FIELD orDELINEATED RADIATION FIELDof dimensions FX and FY (see 2.4)23 Figure 6 Displacement of image intensifier type X-RAY IMAGE RECEPTOR coordinate system origin, Ir, in GANTRY coordinate system, by Rx = 8, Ry = + 10, Rz = 40 (see 2.6)24 Figure 7 Rotation (?w = 270?) and translation ofWEDGE FILTER coordinate system Xw, Yw, Zw inBEAM LIMITING DEVICE coordinate system Xb, Yb, Zb, the BEAM LIMITING DEVICE coordinate system having a rotation (?b) of 345? (see 2.5)25 Figure 8 Rotation (?r = 90?) and displacement ofRADIOGRAPHIC CASSETTE type X-RAY IMAGE RECEPTOR coordinate system Xr, Yr, Zr in GANTRYcoordinate system Xg, Yg, Zg (see 2.6)26 Figure 9 Rotation (?s = 345?) of PATIENT SUPPORTcoordinate system Xs, Ys, Zs in fixed coordinate system Xf, Yf, Zf (see 2.7)27 Figure 10 Table top eccentric coordinate system rotation ?e in PATIENT SUPPORT coordinate system which has been rotated by ?s in the fixed coordinate system with ?e = 360?s (see 2.8 and 2.9)28 Contents Page Foreword2 Introduction5 1Scope and object6 2Coordinate systems6 2.1General rules6 2.2Fixed reference system (“f”) (Figure 1a)7 2.3GANTRY coordinate system (“g”) (Figure 4)8 2.4BEAM LIMITING DEVICE or DELINEATOR coordinate system (“b”) (Figure 5)8 2.5WEDGE FILTER coordinate system (“w”) (Figure 7)8 2.6X-RAY IMAGE RECEPTOR coordinate system (“r”) (Figure 6 and Figure 8)9 2.7PATIENT SUPPORT coordinate system (“s”) (Figure 9)9 2.8Table top eccentric rotation coordinate system (“e”) (Figure 10 and Figure 11)9 2.9Table top coordinate system (“t”) (Figures 10, 11, 18 and 19)10 3Identification of scales and digital DISPLAYS11 4Designation of EQUIPMENT movements11 5EQUIPMENT zero positions12 6List of scales, graduations, directions and DISPLAYS13 6.1Rotation of the GANTRY (Figure 14a and Figure 14b)13 6.2Rotation of the BEAM LIMITING DEVICE or DELINEATOR (Figure 15a and Figure 15b)13 6.3Rotation of the WEDGE FILTER (Figure 7 and Figure 14a)13 6.4RADIATION FIELD or DELINEATED RADIATION FIELD13 6.5PATIENT SUPPORT ISOCENTRIC rotation15 6.6Table top eccentric rotation15 6.7Table top linear and angular movements15 6.8X-RAY IMAGE RECEPTOR movements16 6.9Other scales17 Annex A (informative) Examples of coordinate transformations between ndividual coordinate systems Annex B (informative) Bibliography Annex C (informative) Rationale for changes in IEC scales i © BSI 2008 52 58 58 60 61 62 BS EN 61217:1996+A2:2008 Licensed Copy: London South Bank University, South Bank University, 16/11/2008 11:49, Uncontrolled Copy, (c) BSI 4 Page Figure 16b Rectangular and asymmetrical in YbRADIATION FIELD or DELINEATED RADIATION FIELD, viewed from RADIATION SOURCE(see 6.4) 40 Figure 16c Rectangular and asymmetrical in XbRADIATION FIELD or DELINEATED RADIATION FIELD, viewed from RADIATION SOURCE(see 6.4)41 Figure 16d Rectangular and asymmetrical in Xb and Yb RADIATION FIELD or DELINEATED RADIATION FIELD, viewed from RADIATION SOURCE(see 6.4)42 Figure 16e Rectangular and symmetrical RADIATION FIELD, rotated by ?b = 30?, viewed fromRADIATION SOURCE (see 6.4)43 Figure 16f Rectangular and asymmetrical in YbRADIATION FIELD, rotated by ?b = 30?, viewed from RADIATION SOURCE (see 6.4)44 Figure 16g Rectangular and asymmetrical in XbRADIATION FIELD, rotated by ?b = 30?, viewed from RADIATION SOURCE (see 6.4)45 Figure 16h Rectangular and asymmetrical in Xb and Yb RADIATION FIELD, rotated by?b = 30?, viewed from RADIATION SOURCE (see 6.4)46 Figure 16i Irregular multi-element (multileaf) contiguous RADIATION FIELD, viewed from RADIATION SOURCE, with element motion in Xb direction (see 6.4)47 Figure 16j Irregular multi-element (multileaf) two-part RADIATION FIELD, viewed fromRADIATION SOURCE, with element motion in Xb direction (see 6.4)48 Figure 16k Irregular multi-element (multileaf) contiguous RADIATION FIELD, viewed from RADIATION SOURCE, with element motion in Yb direction (see 6.4)49 Figure 17a PATIENT coordinate system (PATIENT is supine)50 Figure 17b Rotation of PATIENT coordinate system50 Figure F.1 Coordinate transformations between IEC and DICOM PATIENT coordinates Table 1 EQUIPMENT movements and designations12 Table 2 Individual coordinate systems17 Table A.1 Rotation matrices Page Figure 11a Table top displaced below ISOCENTREby Tz = 20 cm (see 2.8 and 2.9)29 Figure 11b Table top coordinate system displacement Tx = + 5, Ty = Le + 10 in PATIENT SUPPORT coordinate system Xs, Ys, Zs rotation (?s = 330?) in fixed coordinate system Xf, Yf, Zf (see 2.8 and 2.9)29 Figure 11c Table top coordinate system rotation (?e = 30?) about table top eccentric system. PATIENT SUPPORT rotation (?s = 330?) in fixed coordinate system Tx = 0, Ty = Le (see 2.8 and 2.9)29 Figure 12a Example of BEAM LIMITING DEVICEscale, pointer on mother system (GANTRY), scale on daughter system (BEAM LIMITING DEVICE), viewed from isocentre (see 2.1.6.2 and clause 3)30 Figure 12b Example of BEAM LIMITING DEVICEscale, pointer on daughter system (BEAM LIMITING DEVICE), scale on mother system (GANTRY), viewed from ISOCENTRE (see 2.1.6.2 and clause 3)31 Figure 12c Examples of scales (see clause 3)32 Figure 13a Rotary GANTRY (adapted from IEC 601-2-1) with identification of axes 1 to 8, directions 9 to 13 and dimensions 14 and 15 (see clause 4)33 Figure 13b ISOCENTRIC RADIOTHERAPY SIMULATOR or TELERADIOTHERAPY EQUIPMENT, with identification of axes 1; 4 to 6; 19, of directions 9 to 12; 16 to 18 and of dimensions 14; 15; 20 to 23 (see clause 4)34 Figure 13c View from RADIATION SOURCE ofTELERADIOTHERAPY RADIATION FIELD or RADIOTHERAPY SIMULATOR DELINEATED RADIATION FIELD (see clause 4)35 Figure 14a Example of ISOCENTRIC TELERADIOTHERAPY EQUIPMENT (see 6.1 and 6.3)36 Figure 14b Example of ISOCENTRIC RADIOTHERAPY SIMULATOR EQUIPMENT (see 6.1)37 Figure 15a Rotated (?b = 30?) symmetrical rectangular RADIATION FIELD (FX?FY) at NORMAL TREATMENT DISTANCE, viewed from beyondISOCENTRE looking toward RADIATION SOURCE (see 6.2)38 Figure 15b Same rotated (?b = 30?) symmetrical rectangular radiation field (FX?FY) at normal treatment distance, viewed from radiation source (see 6.2)38 Figure 16a Rectangular and symmetrical RADIATION FIELD or DELINEATED RADIATION FIELD, viewed from RADIATION SOURCE (see 6.4)39 © BSI 2008 62 52 BS EN 61217:1996+A2:2008 Licensed Copy: London South Bank University, South Bank University, 16/11/2008 11:49, Uncontrolled Copy, (c) BSI 5 Introduction RADIOTHERAPY is performed in medical centres where a variety of EQUIPMENT fr