NORME
`
`INTERNATIONALE
`
`CEI
`
`IEC
`
`INTERNATIONAL
`
`60601-24
`
`Deuxiéme édition
`Second edition
`1998-06
`
`Régles particuliere
`
`esé ur
`
`'
`
`Appareilsélectromédic
`Partie 2-1:
`pour les a céleggt
`dans la 1 ; MeV
`
`cme 0;ons
`
`\
`2-1g
`C .1;
`«r
`q -irements for the safety
`I
`0 Pa}?
`fe‘e§_émW celerators
` / e1 MeVto 50 MeV
`gs
`
`0
`
`Numéro de référence
`Reference number
`CEI/IEC 60601-2-1:1998
`
`Varian Exhibit 2006, Page 001
`
`Varian Exhibit 2006, Page 001
`
`

`
`Numéros des publications
`
`Numbering
`
`Depuis le 1er janvier 1997, Ies publications de la CEI
`sont numérotées a partir de 60000.
`
`IEC publications are
`January 1997 all
`from 1
`As
`issued with a designation in the 60000 series.
`
`Publications consolidées
`
`Consolidated publications
`
`Les versions consolidées de certaines publications de
`la CEI incorporant Ies amendements sont disponibles.
`Par exemple,
`Ies numéros d'édition 1.0, 1.1 et 1.2
`indiquent
`respectivement
`la publication de base,
`la
`publication de base incorporant
`|’amendement 1, et
`la publication de base incorporant les amendements 1
`et 2.
`
`IEC publications
`some
`of
`Consolidated versions
`including amendments are available. For example,
`edition numbers 1.0, 1.1 and 1.2 refer, respectively, to
`the base publication,
`the base publication incor-
`1
`porating amendment
`and the base publication
`incorporating amendments 1 and 2.
`
`
`
`blic fin ‘
`pt under
` r g that
`the
`
`the reconfirmation of
`C catalogue.
`
`technical
`the
`by
`repared this publication, as well
`' ns issued,
`is to be found at the
`
`Validité de la présente publication
`
`Le contenu technique des publications de la CEI est
`constamment
`revu par la CEI afin qu'i| reflete l‘état
`actuel de la technique.
`
`re-
`de
`date
`la
`a
`relatifs
`renseignements
`Des
`confirmation de la publication sont disponibles dans Ie
`Catalogue de la CEI.
`
`Les renseignements relatifs a des questions a l'étude et
`des travaux en cours entrepris par le comité technique
`qui a établi cette publication, ainsi que la
`list
`publications établies, se trouvent dans les do
`ci-dessous:
`
`-
`
`«Site web» de la CE|*
`
`
`
`
`talogue of IEC publications
`Pu lished yearly with regular updates
`i/On-line cata|ogue)*
`IEC Bulletin
`Available both at the IEC web site* and
`as a printed periodical
`
`-
`
`a Catalogue des publications de la CEI
`Publié annuellement et mis a jour régulie eme l
`(Catalogue en |igne)*
`- Bulletin de la CEI
`
`Disponible a la fois a \§ite ab» de
`et comme périodique irn rim"
`Terminologie, syfll
`
`For general
`IEC 60050:
`(IEV).
`
`referred to
`readers are
`terminology,
`International Electrotechnical Vocabulary
`
`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.
`
`
`
`git"? ale. e lecteur
`‘not gie
`En ce qui concerne la er
`se reportera a
`a
`E 6%}: Voc butaire Electro-
`technique Inter:
`tional‘(~
`l)
`iques. es symboles littéraux
`Pour les flbnga gr
`
`I ap rouvés par la CEI,
`le
`et Ies sign
`d'us
`It
`Ia
`El 60 23: Symboles littéraux a
`lecteur consu
`:
`utiliser en électro echntqtr
`la CEI 60417: Symboles
`graphiques utilisables ur
`matériel. Index, relevé et
`compilation des feuilles individuelles, et la CEI 60617:
`Symboles graphiques pour schémas.
`
`g
`
`' Voir adresse «site web» sur la page de titre.
`
`‘ See web site address on title page.
`
`Varian Exhibit 2006, Page 002
`
`et littéraux
`
` ap 'qu
`
`Terminology, graphical and letter
`symbols
`
`Varian Exhibit 2006, Page 002
`
`

`
`NORME
`
`INTERNATIONALE
`
`CEI
`
`IEC
`
`INTERNATIONAL
`
`60601-24
`
`Deuxieme édition
`Second edition
`1998-06
`
`
`
`Appareils électromédic
`
`x
`
`Partie 2-1:
`
`Régles particuliére
`
`e se ur té
`
`pour les a céléggt
`
`-
`
`cgilec ons
`
`MeV
`
`
`
`
`celerators
`
`e 1 MeV to 50 MeV
`
`© IEC 1998 Droits de reproduction reserves — Copyright — all rights reserved
`
`Aucune parlie de cette publication ne peut étre reproduite ni
`ulilisée sous quelque forme que ce soil et par aucun
`procédé, électronique ou mécanique, y compris la pholo—
`copie el les microfilms, sans l'accord écrit de l'éditeur
`
`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
`
`3, rue de Varembé Geneva, Switzerland
`International Electrotechnical Commission
`Telefax: +41 22 919 0300
`e-mail: inmail@iec.ch
`IEC web site http: //www.iec.ch
`
`
`
`Commission Electrotechnique Internationale
`International Electrotechnical Commission
`Memnvnapo/:|Han Snenrporexrwiuecnan Homnccma
`
`.
`
`CODE PR'X
`PRICE CODE
`,
`_
`_
`Pour pI'IX, VON’ catalogue en vlgueur
`For price, see curren! catalogue
`
`Varian Exhibit 2006, Page 003
`
`Varian Exhibit 2006, Page 003
`
`

`
`-2-
`
`60601-2-1©CEI:1998
`
`SOMMAIRE
`
`Pages
`
`8
`
`12
`
`14
`
`18
`
`24
`24
`
`28
`
`34
`
`34
`
`40
`
`46
`46
`
`46
`46
`48
`
`48
`48
`
`50
`
`52
`
`52
`
`54
`
`56
`
`58
`
`60
`
`62
`
`AVANT-PROPOS .......................................................................................................... ..
`
`INTRODUCTION ........................................................................................................... ..
`
`Articles
`
`SECTION UN — GENERALITES
`
`Domaine d'app|ication et Objet .............................................................................. ..
`
`Terminologie et définitions .................................................................................... ..
`
`Prescriptions générales relatives aux essais ......................................................... ..
`Classification ............................................................................................. ..
`
`Identification, marquage et documentation ............................... ..
`
`.
`
`.... ..
`
`
`
`...
`..
`.
`..
`.
`...
`..
`..
`...
`Conditions d'environnement..............................................
`
`SECTION DEUX —- CONDITIONS D'ENVlRO
`
`E
`
`SECTION TROIS — PROTEC l’ON~
`
`ENVELOPPES et CAPOTS DE PROTECTlON.......
`
`.................................... ..
`
`18 Mise a la terre de protection, mi
`19
`COURANTS DE FUITE PERMANENTS e
`
`alisation des potentiels 38
`T ............................ ..
`38
`
`SECTION QU TR
`
`
`
`1
`
`2
`
`4
`5
`
`6
`
`10
`
`16
`
`22
`
`29
`
`29
`
`Parties en mouv me
`
`...................................................................................... ..
`
`' ique...................................................
`-
`Puissance pneuvEai
`27
`28 Masses d es ........................................................................................
` G N
`- TECTION CONTRE LES RISQUES DUS
`—
`~ xh ENTS NON DESIRES OU EXCESSIFS
`
`X .
`......................................................................................
`RAYON E
`ri
`ions
`se urit‘
`oncernant Ie RAYONNEMENT IONISANT ............................ ..
`Pre
`29.
`Pr CM cont :9 une DOSE ABSORBEE incorrecte dans Ie VOLUME TRAITE ...... ..
`
`\29.\ .1 %)n role et surveillance de la DOSE ABSORBEE ..................................
`1\2 .1.1.1
`SYSTEMES DE SURVEILLANCE DE DOSE ................................
`
`29.1.1.2 DETECTEURS DE RAYONNEMENT ........................................ ..
`
`29.1.1.3 Sélection et AFFICHAGE du nombre des UNITES
`DU SYSTEME DE SURVEILLANCE DE DOSE ............................ ..
`
`29.1.1.4
`
`FIN DE L'|RRADIAT|ON provoquée par Ie SYSTEME DE
`SURVEILLANCE DE DOSE ................................................... ..
`
`29.1.1.5 Surveillance de la distribution de DOSE ABSORBEE ........... ..
`
`29.1.2 MINUTERIE ...................................................................................... ..
`
`29.1.3
`
`DEBIT DE DOSE ABSORBEE ................................................................ ..
`
`29.1.4
`
`Sélection et AFFICHAGE du TYPE DE RAYONNEMENT ........................... ..
`
`29.1.5
`
`Sélection et AFFICHAGE de |’ENERGIE .............................................. ..
`
`Varian Exhibit 2006, Page 004
`
`Varian Exhibit 2006, Page 004
`
`

`
`60601-2-1©|EC:1998
`
`-3-
`
`CONTENTS
`
`FOREWORD ................................................................................................................. ..
`
`INTRODUCTION ........................................................................................................... ..
`
`Clause
`
`SECTION ONE — GENERAL
`
`1
`
`2
`
`Scope and object .................................................................................................... ..
`
`Terminology and definitions .................................................................................. ..
`
`4 General requirements for tests ............................................................................. ..
`5
`Classification .................................................................................................... ..
`
`6
`
`Identification, marking and documents ............................... ..
`
`10 Environmental conditions
`
`SECTION TWO — ENVIRONMENTA
`
`SECTION THREE — PROTECTION A
`
`16 ENCLOSURES and PROTECTIVE cov RS.
`
`
`
`18 Protective earthing, functional earth‘ g a d ote
`19 Continuous LEAKAGE CURRENTS an PATIENT U
`
`i
`LIA
`
`'
`'
`CURRENTS ............................. ..
`
`SECTION FO R
`
`P O
`
`22 Moving parts ......................... ..
`
`. ....................................................................... ..
`
`27 Pneumatic an hy rauhc
`
`28 Suspended $2 ............................................................................................._
`
`
`
`
`
`
`
`Page
`
`9
`
`13
`
`15
`
`19
`
`25
`25
`
`29
`
`35
`
`35
`
`39
`39
`
`41
`
`47
`
`47
`
`47
`47
`
`49
`49
`49
`
`51
`
`53
`
`53
`
`55
`57
`
`59
`
`61
`
`63
`
`
`TIOQI FI%/_g— ROTECTION AGAINST HAZARDS
`TED OR EXCESSIVE RADIATION
`M N
`29 X-RADIA ON .
`.
`.
`.
`.
`.
`.
`...
`.....................................................................................
`29
`IONI .t¥K\MsaE§ty requirements.....................................................................
`
`29.1
`
`nst incorrect ABSORBED DOSE in the TREATMENT VOLUME ......... ..
`PQtestio a
`29.1~7‘I\y nitoring and control of ABSORBED DOSE ....................................... ..
`29.1.1.1
`DOSE MONITORING SYSTEMS .......................................... ..
`
`29.1.1.2
`
`RADIATION DETECTORS .................................................. ..
`
`29.1.1.3
`
`Selection and DISPLAY of DOSE MONITOR UNITS .............. ..
`
`29.1.1.4
`
`TERMINATION OF IRRADIATION by the DOSE MONITORING
`SYSTEM ........................................................................ ..
`
`29.1.2
`
`Monitoring of distribution ofABSORBED DOSE ................. ..
`29.1.1.5
`CONTROLLING TIMER ........................................................................ ..
`
`29.1.3
`
`ABSORBED DOSE RATE ..................................................................... ..
`
`29.1.4
`
`Selection and DISPLAY of RADIATION TYPE ....................................... ..
`
`29.1.5
`
`Selection and DISPLAY of ENERGY ................................................... ..
`
`Varian Exhibit 2006, Page 005
`
`Varian Exhibit 2006, Page 005
`
`

`
`60601-2-1©|EC:1998
`
`-41 —
`
`SECTION FOUR — PROTECTION AGAINST MECHANICAL HAZARDS
`
`The clauses and subclauses of this section of the General Standard apply, except as follows:
`
`22 Moving parts
`
`Replacement:
`
`22.4 Powered movements (see figure 108)
`
`For the PATIENT SUPPORT system, these requirements shall apply when the ye em is unloaded
`and when it is loaded with a distributed mass of 135 kg.
`
`EQUIPMENT
`
`
`
`the(%‘v'ng 0
`
`NOTE 1 — The phrase "to set-up automatically" or "automatic set-up" is used to d
`Parts automatically to the Positions required for the start of a PATIENT treatment. 6
`kes place
`T [3 Q5
`0 l§1l'Il'l
`NOTE 2 — The term "pre-programmed movements" is used where move
`n
`of
`according to a previously planned programme, without intervention by the O ERAT R du ' gxflflfm treatment;
`
`22.4.1 GANTRY, RADIATION HEAD and PATIENT SUPPO
`
`syst
`
`thetreatment is referredtoas a "pre-programmed treatment". 3$\
`
`a) General
`
`int
`NOTE — A "failure of powered movemef
`
`1) Where the possibility exists that failuxf as
`might result in the PATIENT beiirning tr
`p cl,
`release of the PATIENT; these m ansfihslxlb
`is provided with a device designed to
`2) When the RADIATI
`0 her part
`colli“ n with the PATIENT,
`reduce,
`in NO MAL
`H
`the operation and
`the ri
`limitations of ea1ch\d v esh lI“t.2,e
`s
`it:-e.
`in the INSTRUCTIONS FOR USE.
`3)
`Interrupti
`l‘I\G.{ failure 0 p Ker
`huoevf ents or of the SUPPLY MAINS for the EQUIPMENT,
`shall cauggan i mo ion t
`stopped within the limits given in parts b), 3) and
`I:
`c), 3) of this
`tkia
`\nd
`4) For autor§Et\t
`s\eSt\—I;Ip
`f9.
`the checks of pre-programmed movements before
`treatm
`p6t;\d\ gall
`e\reduced at least 5° before a planned stop angle and at least
`25 m beta
`la Izgd
`top position; the speed reduction shall be such that overshoot
`a
`d
`t
`xcxted
`f
`rotational displacements and 5 mm for linear displacements.
`l3 fh §reduction processesshall be included inthetechnicaldescription.
`
`associated with the powered movements.
`
`SE,
`
`f
`
`\.
`
`
`
`
`
`Compliance is checks as follows:
`‘so
`
`I53
`
`rprel
`
`cl Qh wfla ure only of the SUPPLY MAINS
`
`ovement during NORMAL USE
`owe ed
`
`-eans shall be provided to permit the
`C ' ed in the INSTRUCTIONS FOR USE.
`
`
`
`1) 2)
`
`by inspection of the INSTRUCTIONS FOR USE and the facilities provided,’
`
`3)
`
`by interruption of the SUPPLY MA/Ns a) to powered movements, b) to the EQUIPMENT,
`and measurement of the stopping distances.
`In order to eliminate the effects of
`variable personal
`reaction times, measurement shall start at
`the instant
`the
`personally actuated switch contacts open or close.
`In determining a stopping
`distance,
`the measurement shall be repeated five times,‘ on each occasion,
`the part
`in motion shall stop within the allowable distance,‘
`
`4)
`
`by inspection and measurement, and by inspection ofthe technical description.
`
`Varian Exhibit 2006, Page 006
`
`Varian Exhibit 2006, Page 006
`
`

`
`— 42 —
`
`60601-2-1© CE|:1998
`
`b) Mouvements de rotation
`
`1) Pour chacun des mouvements,
`supérieure at 1° x s“.
`
`la vitesse minimale disponible ne doit pas étre
`
`2) Aucune des vitesses ne doit étre supérieure at 7° x s’1.
`
`la distance
`3) Etant a une vitesse de rotation proche de 1° x s'1 mais sans la dépasser,
`angulaire parcourue par la partie mobile entre le moment on |'une quelconque des
`commandes d'arrét est actionnée et son arrét ne doit pas dépasser O,5°. Pour les
`vitesses supérieures at 1° x s‘1 cette distance angulaire ne doit pas dépasser 3°.
`Exception: La prescription en 2) ci-dessus n'est pas applicable au DISPOSITIF DE LIMITATION DU FAISCEAU
`(DLF).
`
`c) Déplacements linéaires
`
`2) Aucune des vitesses ne doit dépasser 100 mm x s’1.
`
`3) La distance parcourue par une partie mobile, entre lexqi
`
`
`e to l' ne
`
`.
`
`10 mm pour toute vitesse supérieure a 25 m /S?‘ “\et\
`
`p‘e
`
`toute vitesse ne
`
`, des bords
`
`1) La vitesse minimale disponible concernant les déplacements 20.
`du CHAMP DE RAYONNEMENT et les déplacements 9, 10 et 11
`dIs;.§ oRT DU
`
`PATIENT ne doit pas étre supérieure a 10 mm x s’1.
`>conque des
` ne oit pas dépasser
`commandes de |'arrét du mouvement est actionnéc.<{\et‘s
`dépassant pas 25 mm x s‘1.
`[I \\
`La conform/'té pour b) et a) est vérifiée par mesu@‘%'1s.«ps<3"
`e distances d'arrét des parties
`en mouvement, a /'aide d'instruiI1ents/sip op 4'1é§.
`/1 ‘n d.s‘-ii'I';.1fier\tp'5te variation due au temps
`de réaction des personnes, les mesui:E~s\do'v\e t\pre dre
`n codpte /’instant d’ouverture ou de
`fermeture des contacts actionnés par c‘e‘s p
`nn s.\Po*-r—~a determination des distances
`d’arrét, cinq essais séparés doivent étrgeffecfues.
`our ha-que essai, Ia partie en mouvement
`doit s'arréter dans la distance admissib e (
`ir ’ ale Qt/2.4.3, 22.7. 101, 27.101 et29. 1.6 f)).
`'_H\
`22.4.2 Commande des
`ou ments
`ie
`e |'APPAREIL
`pa
`depuisI'intéreur
`las
`~
`in TE
`NT
`LV $5 M
`\
`ll ne doit pas
`e ossibl
`d~'-a
`near Ie mouvements motorisés de parties de |'APPARElL
`|'0PERATEUR n‘exerce pas une action
`qui pourraie t ctzguser des~\b|e‘sQf.Ir s}au/ ATIENT si
`personnelle eF% r Cifix miter upteurs simultanément. Chaque interrupteur, lorsqu‘i|
`est reléché, doi
`’tre
`p -
`le
`‘Q1 e-‘t
`r le mouvement. Un interrupteur peut étre commun a
`tous les mou in n-s K >
`NOTE — Le
`lT'| an;
`e
`sxgrotation ou les mouvements linéaires des DLF ne sont pas considérés comme
`pouvant ca
`er dE‘5
`as ures au)>ATIENT si
`les ACCESSOIRES qui y sont fixés sont munis d‘un dispositif de
`\ I
`sécuriI?i’a'n%c llisi n it égrfl Si ce n'est pas Ie cas,
`ils sont considérés comme présentant un RISQUE (cas de
`WP
`certai s\so\§=1 ATEUR DU FAISCEAU D'ELECTRONS).
`b) Pour les
`PA leg I sont prévus pour effectuer des mises en place automatiques,
`il ne
`
`doit pas ektrexfipo
`ible de démarrer ni de continuer
`les mouvements concernés,
`si
`
`
`
`a)
`
`D
`
`|'interrupteur de
`sur
`|‘oPERATEUR n'e erce pas une action personnelle et Continue
`commande de mise en place automatique et simultanément sur un interrupteur commun a
`tous les mouvements.
`
`c) Les interrupteurs prescrits en a) et b) ci-dessus, doivent étre situés a proximité du dispositif
`SUPPORT DU PATIENT de telle sorte que, par une observation attentive,
`|'OPERATEUR puisse
`eviter tout risque de blessure pour le PATIENT. Au moins |’un des interrupteurs prescrits en
`a) et b) ci-dessus doit faire partie d'un CIRCUIT CABLE.
`
`lorsque les prescriptions d'un
`INSTRUCTIONS D'UT|L|SAT|ON doivent préciser que,
`d) Les
`traitement prévoient d'effectuer soit des mouvements commandés a distance depuis le PCT,
`soit des mouvements préprogrammés,
`il convient que l'oPERATEUR, avant de quitter la
`SALLE DE TRAITEMENT, procede a une verification de tous les mouvements prévus ou
`programmés, le PATIENT étant dans la position prévue pour le traitement.
`
`La conformité est vérifiée par examen.
`
`Varian Exhibit 2006, Page 007
`
`Varian Exhibit 2006, Page 007
`
`

`
`60601-2-1©|EC:1998
`
`— 43 —
`
`b) Rotational movements
`
`1) The minimum speed available for each movement shall not exceed 1°>< s‘1.
`
`2) No speed shall exceed 7” x s'1.
`
`3) When rotating at the speed nearest to, but not exceeding, 1° >< s‘1, the angle between
`the position of the moving part at
`the instant of operating any control
`to stop the
`movement and its final position shall not exceed 0,5° ; for speeds faster than 1° x s‘1, it
`shall not exceed 3°.
`
`Exception — Requirement 2) above does not apply to the BEAM LIMITING SYSTEM (BLS).
`
`c) Linear movements
`
`the RADIATION
`3 0
`1) The minimum speed available for displacements 20, 21, 22 and
`FIELD edges, and displacements 9, 10 and 11 of the PATIENT su P RT sys m shall not
`exceed 10 mm x s'1.
`
`
`
`rating any
`
`‘I mm for any
`mm x s'1.
`
`2) No speed shall exceed 100 mm x $71.
`st nt
`t the
`3) The distance between the position of the moving part,
`control to stop the movement, and its final positiw n t e ce d
`no
`‘
`speed greater than 25 mm x s'1, and 3 mm for spee
`c e ng
`
`
`
`
`rum nts, by measurement
`ur.'
`.g l
`Compliance with b) and c) is checked, using suitabi
`in
`r to
`in or
`of speeds of moving parts and their stopping o‘_i.s$ Ce .
`limlnate the effects of
`variable personal reaction times, meas ment 5&3 l) ar at@j* ins nt the personally actuated
`switch contacts open or close.
`In det rm in
`a st ppfn
`di
`n
`,
`the measurement shall be
`repeated five times,’ on each occasigbqth part i mo ‘on s all stop within the allowable
`distance (see also 22.4.3, 22. 7. 101, 27.,
`an 29 1.6%
`22.4.2 Operation ofmo<Twts-o(Egfl=%:‘S5%! om insidetheTREATMENTROOM
`0 otger tgwoimdiedjhovements of EQUIPMENT parts which may
`%‘ PA'l(E
`, w o t-
`cause physical injuFy\t\
`ontinuous personal action by the OPERATOR
`
`on two swit
`e§ns\imu|ta~eogtsl
`" ch switch, when released,
`shall be capable of
`
`interrupting -ove awn SWIQQ’
`yb common to all movements.
` s are not considered to be likely causes of injury to the PATIENT
`NOTE — Linear or rotaficktkl
`justm ys.\ca
`unless ACCESSORI é\\ha fitted tha do not h we integral safety devicesltouchguards or are otherwise considered
`to present a SAF-'E§Hi<:°Ee.\g._ so :2 typ s of ELECTRON BEAM APPLICATORS.
`b) For EQUI MEN% te
`to
`e set up automatically,
`it shall not be possible to initiate or
`maint§j{1R ove Sqakts ass c"
`ted with this condition without continuous personal action by
`the
`E »o\ RVSI ulta eously on the automatic set—up switch and a switch common to all
`move
`Ti
`iS.\
`c) The switch 5 riakgired in a) and b) above shall be located close to the PATIENT SUPPORT
`
`e9
`
`a)
`
`it shall not be pos ibl
`
`-nd
`
`the OPERATOR can avoid possible injury to the
`system, so REL» y careful observation,
`PATIENT. At least one of the switches required in a) and b) shall be HARD—WIRED.
`
`d) The INSTRUCTIONS FOR USE shall contain advice that, when either an intended remotely
`controlled movement from the TCP or a pre-programmed movement
`is included in the
`treatment prescription, with the PATIENT finally positioned, a check of all
`intended or
`planned movements should be made by the OPERATOR before leaving the TREATMENT ROOM.
`
`Compliance is checked by inspection.
`
`Varian Exhibit 2006, Page 008
`
`Varian Exhibit 2006, Page 008