Blue Phantom Manual

NOTICE This manual is an integral part of the Blue Phantom as a measuring device and should always be kept nearby. Observance of the manual is required for proper performance and correct operation of the Blue Phantom. The Blue Phantom and its accessories must not be used for any other purpose than described in the accompanying documentation (intended use). Violation will result in loss of warranty. The use of the Blue Phantom and any other equipment described in this document, the generated data, as well as the validation of the data prior to clinical use remains the sole responsibility of the user. Scanditronix-Wellhöfer and its distributors disclaim all warranties, either expressed or implied, including (but not limited to) any implied warranties of fitness for a particular purpose and noninfringement. Additional statements such as presentations, whether oral or written, do not constitute warranties by Scanditronix-Wellhöfer and should not be relied upon. Scanditronix-Wellhöfer does not accept liability for injury to personnel or damage to equipment that may result from misuse of this equipment, failure to observe the hazard notices contained in this manual or failure to observe local health and safety regulations. No part of the accompanying documentation may be translated or reproduced without written permission of Scanditronix-Wellhöfer, unless the reproduction is carried out for the sole purpose to be used by several people in the same department. The user must treat the accompanying documentation like any other copyrighted material. Especially, if part of the accompanying documentation is provided in electronic form, these files shall not be modified in any way. Scanditronix-Wellhöfer and its suppliers retain title and all ownership rights to the accompanying documentation (either in electronic or in printed form).

IBA Advanced Radiotherapy www.iba-ar.com Wellhöfer Dosimetrie GmbH Bahnhofstraße 5 D-90592 Schwarzenbruck Germany Phone: +49 9128 607-0 Fax: +49 9128 607-10 mailto: [email protected]

Scanditronix Medical AB Stålgatan 14 SE-754 50 Uppsala Sweden Phone: +46 18 18 07 00 Fax: +46 18 12 75 52 mailto: [email protected]

Copyright © 2001 by Wellhöfer Dosimetrie GmbH.

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Blue Phantom Manual

Table of Contents

Table of Contents... 3 Introduction ... 7 The Blue Phantom... 7 The Blue Phantom Manual... 7 Health and Safety Information... 7 Hardware description ... 7 Installation... 7 Setting up for measurement ... 7 Maintenance... 8 Specifications ... 8 Appendix A ... 8 Associated documentation ... 8

Health and safety information ... 9 General... 9 Safety labels ... 10 AquaLift ... 10 Blue Phantom ... 11 Electrical Lift Table... 11 Rating labels ... 12 Responsibility... 13 Regulatory requirements... 13 Safety Precautions ... 14 Reporting complaints... 14

Hardware Description...15 Introduction... 15 Hardware... 15 Software... 15 Blue Phantom ... 17 Connectors on the Blue Phantom... 18 The Hand Control... 18 Description of the buttons on the hand control... 19 Description of the LEDs on the hand control... 21 CU500E (Control Unit)... 21 Manual Controls... 21

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Connectors... 22 AquaLift (option)... 23 Control panel ... 24 Support screws ... 24 Mains power cable ... 25 Tubing... 25 Electrical Lift Table (option)... 26 Introduction ... 26 Manual Lift Table (option) ... 27 Introduction ... 27 Water Reservoir with bi-directional pump ... 28 Introduction ... 28 TMR Probe (option)... 30 Detectors (option)... 31 Introduction ... 31 Semiconductor detectors ... 31 Field detector for electrons ... 31 Field detector for photons... 31 Field detector, stereotactic beam... 32 Reference detector ... 32 Ionisation chambers ... 32 CC Chambers (Compact chambers) ... 32 PPC Chambers (Plane parallel chambers)... 33 FC Chambers (Farmer type chambers)... 33 NACP Chamber... 33 RK Chamber ... 33 MD240 24-channel electrometer (option) ... 34 Introduction ... 34 Connectors... 35 Keys on the MD240 front side... 35 CAN Bus board... 36 CA24 Chamber Array (option) ... 37 Blue Phantom Cable Support... 37 Other options ... 38 Treatment head scanning servos ... 38 The one-dimensional headscanner HSC 1D ... 38 Connectors on the HSC 1D ... 38 The two-dimensional headscanner HSC 2D... 39

Installation ... 41 Introduction... 41 Unpacking and Installation ... 41 General unpacking instructions ... 41 AquaLift... 42 Tools and accessories ... 42 Unpacking AquaLift... 42 Check Lifting function... 43 Check Pumping function ... 44 Electrical Lift Table... 45 Unpacking Electrical Lift Table... 45 Manual Lift Table ... 46 Unpacking Manual Lift Table ... 46 Safety Precautions (Electrical and Manual Lift Table)... 46 Water Reservoir... 47 Unpacking Water Reservoir... 47 Safety Precautions... 47 Putting into operation for the first time ... 48 Blue Phantom... 49

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Unpacking the Blue Phantom ... 49 Blue Phantom Installation ... 50 Device connection overview... 50 Blue Phantom and TMR probe ... 51 Blue Phantom, CU500E and PC... 52 MD240 and CAN Bus interface... 54 Installation of the PCI CAN Bus board and driver ... 54 Connecting the MD240... 54 Installation Verification (Blue Phantom, CU500E)... 55 Servo movement ... 55 Electrometer Control... 57 High Voltage ... 57 Installation Verification (CAN Bus board, MD240) ... 58

Setting up for measurement ...59 Introduction... 59 Blue Phantom and AquaLift... 60 Place Blue Phantom on AquaLift ... 60 Fill Blue Phantom... 61 Adjust SSD... 62 Empty Blue Phantom... 62 Blue Phantom and Lift Table / Water Reservoir ... 63 Place Blue Phantom on Lift Table... 63 Fill Blue Phantom... 64 Adjust SSD... 65 Empty Blue Phantom... 65 Control Cables ... 66 Detectors ... 67 Field and Reference Detector explanation... 67 Field detector... 67 Reference detector... 68 Comments on beam direction... 68 Fine-Levelling the Blue Phantom ... 69 Setup for TPR/TMR measurements... 72 CA24 Chamber Array and MD240 Electrometer ... 74 CA24 adapter set description ... 75 Mounting the CA24 in the Blue Phantom... 76 Mounting the CA24 cable support... 77 CA24 measurement setup ... 80 Setup for in-air measurements ... 84 Headscanner servos HSC 1D and HSC 2D... 84 General... 84 Possible measurement types... 84 Installing the headscanner and detectors ... 84 Mounting of Build-up layers and Wedge... 85 Measurement Setup... 85 Attachments and accessory holders... 86

Maintenance ...93 Introduction... 93 Daily Check ... 94 AquaLift and Water Reservoir ... 94 Monthly maintenance... 94 Blue Phantom ... 94 HSC 1D and HSC 2D... 95 AquaLift, Water Reservoir, Lift Table ... 95

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Yearly Maintenance... 96 Blue Phantom... 96 Checking positioning accuracy ... 96 HSC 1D and HSC 2D... 96 Checking positioning accuracy ... 96 Lift Table... 97 Mechanical parts ... 97 Electrical control unit (Electrical Lift Table only)... 97 Hand control (Electrical Lift Table only) ... 97 Water Reservoir... 98 2-yearly maintenance... 98 AquaLift... 98 Replacing spare parts... 99 CU500E and MD240 ... 99 Replacing mains fuse... 99 Water Reservoir...100 Resetting automatic fuse...100 AquaLift...101 Removing cover...101 Replacing fuses ...102 Resetting automatic fuse...102 Replacing the impeller...103 Electrical Lift Table...104 Replacing the electrical control unit...104

Specifications ...109 General ...109 Standard Equipment...109 Accessories ...110 In-Air Scanner ...110 Detectors ...110 Technical Data...111 CU500E ...111 Serial cable ...113 Blue Phantom...113 Accessories...114 In-air Headscanner HSC 1D...114 In-air Headscanner HSC 2D...114 AquaLift ...114 Electrical Lift Table ...115 Water Reservoir...115 CA24 ...116 MD240...117 TMR Probe...118

Appendix A - Complaint report ...119 Reporting complaints...119

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Blue Phantom Manual

Introduction

The Blue Phantom The Blue Phantom is a measuring device for the measurement and analysis of the radiation field of medical linear accelerators and is part of the OmniPro-Accept system. It consists of a three-dimensional servo (the Blue Phantom tank with mechanics), a Control Unit with integrated two channel electrometer (CU500E), and two single detectors (ionisation chambers). As an option, a linear chamber array (CA24) with 24-channel electrometer (MD240) is available. With an additional one-dimensional (HSC 1D) or two-dimensional servo (HSC 2D) and a support for mounting on the gantry of a treatment machine, the system can be used for in-air measurements. Detector systems that can be attached to the Blue Phantom include single semiconductor detectors, cylindrical and plane parallel ionis ation chambers.

The Blue Phantom Manual The Blue Phantom Manual is intended for the physicist or engineer working with regular quality control of radiation therapy equipment. It assumes that the operator has a working knowledge in radiation physics and dosimetry. It is further assumed that the operator is used to working with treat ment machines and accessories. This manual contains a brief system overview, instructions for installation, setup and operator maintenance. Refer to your Scanditronix-Wellhöfer distributor for all questions regarding service and support. The contents of this manual are as follows:

Health and Safety Information Describes the hazards associated with the equipment. All personnel must read this chapter and be fully aware of its contents.

Hardware description Gives an overview of the components in the Blue Phantom.

Installation Provides instructions for installing and verifying the function of the hardware of the Blue Phantom.

Setting up for measurement Describes the setup of the Blue Phantom for measurements in the beam.

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Maintenance Provides instructions for operator maintenance.

Specifications Contains technical data for the Blue Phantom and its accessories.

Appendix A Contains complaint report forms that should be used to report any complaints about the Blue Phantom.

Associated documentation •

OmniPro-Accept System Manual: provides instructions for dosimetry measurements using the Blue Phantom.

Further specific user's guides exist for different ionisation chambers, providing information on materials and dimensions of these chambers and correction factors for absolute dosimetry.

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Health and safety information

General IMPORTANT NOTICE All personnel must read this chapter and be fully aware of its contents before commencing installation work, and before operating or servicing the Blue Phantom. If the Blue Phantom is used in a way not specified by ScanditronixWellhöfer, the protection provided by the equipment may be reduced.

The purpose of this chapter is to identify the hazards associated with the equipment. This information is presented by showing all safety and rating labels which are attached to the equipment, and providing instructions to avoid the associated hazards. Throughout the manual, hazardous situations or operations are identified by Warning and Caution Notices, where: •

Warning notices describe hazardous conditions where failure to observe the instructions may result injury to persons.

•

Caution notices describe hazardous conditions where failure to follow the instructions may result in damage to equipment or stored data.

In addition to Warnings and Cautions, certain information is emphasised in Important Notices and Notes:

Blue Phantom Manual

•

Important Notices contain instructions on the use of this manual, especially regarding health and safety information.

•

Notes contain additional information and explanations, which are not safety issues.

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Health and safety information • 9

Safety labels AquaLift Caution

Consult accompanying documents This label alerts the user to consult this manual before using the equipment. If the equipment is not handled according to the instructions in this manual and other accompanying documents, the protection provided by the equipment may be reduced.

Caution

Protective earth connection The pump box cover on AquaLift must always be connected to the carriage assembly by an earth wire. The mounting screw for the earth wire is marked with the symbol shown here.

WARNING

HEAVY OBJECT AquaLift weights up to 500 kg when filled with water. Follow the instructions on the labels to avoid personal injury or damage to equipment.

WARNING - PINCH HAZARD AquaLift weights up to 500 kg when filled with water. Keep your feet away from the wheels when moving AquaLift. Always lock AquaLift with support screws during use.

WARNING - HAZARD DURING TRANSPORT With filled water reservoir, AquaLift may be difficult to stop on inclined floors. Always empty the water reservoir before transporting AquaLift over inclined surfaces.

WARNING

MOVING PARTS (AQUALIFT) Follow the instructions on the label to avoid injury to fingers.

WARNING - PINCH HAZARD The lifting table moves close to the equipment shelf. Keep hands away from the equipment shelf when operating the lifting table.

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Blue Phantom WARNING

MOVING PARTS (BLUE PHANTOM) Follow the instructions on the label to avoid injury to fingers. CAUTION - keep your hands out during movement of the mechanics

Electrical Lift Table WARNING

PINCH HAZARD Keep your hands away from the area below the platform when lowering the lift table. When the platform reaches the lowest position, your hand may be jammed between the platform and the lift table's housing.

KEEP YOUR HANDS AWAY WHEN MOVING THE PLATFORM

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Health and safety information • 11

Rating labels Rating labels are attached to the following products:

WARNING

•

CU500E,

•

MD240 Electrometer,

•

AquaLift,

•

Electrical Lift Table and Water Reservoir,

•

TMR Probe.

HAZARDOUS VOLTAGES Pay attention to the voltage ratings on the rating labels. These determine the safety hazards for components connected to the supply voltages. Do not open covers.

Normally, the labelling consists of identification and electrical rating, as shown below.

Figure 1. Typical rating label.

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Blue Phantom Manual

Responsibility WARNING

DATA EVALUAT ION RESPONSIBILITY The person managing the Blue Phantom bears the full responsibility for critically evaluating every measurement result and/or manipulating measurements before transferring the data to a treatment planning system.

Caution

Assembly and Repairs, Accessories Assembly, extension, modification or repair shall only be carried out by Scanditronix-Wellhöfer or by persons who have sufficient knowledge and skills and are authorised by Scanditronix-Wellhöfer. For repairs, only spare parts provided or approved by the manufacturer must be used, otherwise operator safety, specified measuring accuracy and interference free operation cannot be guaranteed. Violation of this prescription will result in loss of warranty. Scanditronix-Wellhöfer cannot be held liable for any damages resulting from the use of accessories or consumables which are not provided or approved by the manufacturer.

Regulatory requirements The Blue Phantom fulfils the requirements of the following European directive and standards: •

Medical Devices Directive 93/42/EEC,

•

EN 60601-1, Safety requirements for medical electrical systems,

•

EN 60 601-1-2, Electromagnetic compatibility - requirements and tests,

•

IEC 60731, Medical electrical equipment - Dosimeters with ionisation chambers as used in radiotherapy.

The quality assurance system at Wellhöfer Dosimetrie GmbH is certified since 1995 according to DIN EN ISO 9001 and DIN EN 46001.

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Health and safety information • 13

Safety Precautions 1.

The Blue Phantom should only be used by people who are: •

aware of and understand the limitations of the device as they relate to the measurement of radiation output,

•

knowledgeable about safety procedures observed when working with radiation sources such as Cobalt-60 machines or linear accelerators,

•

aware of safety precautions required to avoid possible injury when using electrical / electronic equipment.

2.

Before using the Blue Phantom, the operator must ensure that it is correctly connected and in proper working condition. The user must verify the general functionality, safety and duly condition of the tank, the mechanics, electronics and the detector(s).

3.

Never connect or disconnect an ionisation chamber or a chamber extension cable to or from a dosimeter or electrometer unless the high voltage is switched off.

4.

The Blue Phantom including all accessories is a sensitive measuring system and must be stored in a clean, dry, preferably air-conditioned area at room temperature. Protect it from mechanical and thermal stress and unnecessary moisture. Mount the protection caps where provided.

Note:

Devices on which moisture has developed as a result of temperature changes must not be used unless they have been completely dried.

5.

The electrical installations of the relevant rooms must comply with IEC recommendations.

6.

Use only detectors which are designed according to the electrical connection convention (floated input technology) required by the CU500E. The connection of detectors which are designed for grounded input technology, even by means of adapters, causes unsafe and hazardous conditions and is generally not permitted.

Reporting complaints The Quality Assurance system of Scanditronix-Wellhöfer includes a routine to handle any reported complaints. The user shall report all complaints about the system to any representative of Scanditronix-Wellhöfer or directly to: Wellhöfer Dosimetrie GmbH Bahnhofstraße 5 D-90592 Schwarzenbruck Germany Phone: +49 9128 607-0, Fax: +49 9128 607-10 mailto: [email protected] A complaint should be reported in the enclosed form Complaint Report Blue Phantom. Three copies of the form are included in Appendix A of this manual. Always keep one copy of the form in this manual. If needed, make more photocopies of the form. If there is no copy of the form, make a written report describing the fault as specifically as possible.

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Hardware Description

Introduction Hardware The Blue Phantom consists of a Control Unit (CU500E), a water phantom with three-dimensional servo and an optional chamber array (CA24) with its 24channel electrometer (MD240). The CU500E can also be used with a one-dimensional or two-dimensional servo for in-air measurements on a gantry. Detector systems which can be used with the Blue Phantom include single semiconductor detectors, chamber array (CA24), cylindrical ionisation chambers as well as plane-parallel ionis ation chambers.

Software The OmniPro-Accept software provides functions for easy set-up and overview of equipment and measurements. The OmniPro-Accept software runs under the following operating systems: Windows 98, Windows NT SP3 or higher, Windows 2000 SP1. For operating instructions, refer to the OmniPro-Accept System Manual.

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Hardware Description • 15

Control Unit CU500E

Electrometer MD240

The Blue Phantom

Compact ionisation chamber

Semiconductor field detector

TMR Probe Farmer 2571

Semiconductor reference detector

Cylindrical / thimble chamber

Plane parallel ionisation chamber

Chamber Array CA24

Single Detectors Figure 2. The Blue Phantom.

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Blue Phantom The Blue Phantom comprises a three-dimensional high precision servo mechanism and a Perspex water tank. On the horizontal X-rail there is a sliding shoe on which detector holders for various detectors can be mounted. The field detector can be positioned in all three dimensions for measuring both horizontal and vertical beams. Every dimension is equipped with a calibrated stainless steel ruler, so that the accurate positioning can always be verified. The motors of the three dimensions are combined with potentiometers providing real-time feedback of the current position.

Hand control Connector box

Water tank

Figure 3. The Blue Phantom.

The connector box contains connectors for the three motors/potentiometers, the drive control cable, the hand control, and the TMR equipment.

Figure 4. The connector box.

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Connectors on the Blue Phantom The following connectors are located on the connector box of the Blue Phantom: PUMP CONTROL

Remote control output used for the connection to the AquaLift or the Water Reservoir during TPR/TMR measurements.

TMR

Input for Water Level Transducer.

REMOTE CONTROL

Input for the hand control.

DRIVE CONTROL

Connector for the 37-pin controller cable from the CU500E.

X-DRIVE

Connector for the x-drive motor / potentiometer.

Z-DRIVE

Connector for the z-drive motor / potentiometer.

Y-DRIVE

Connector for the y-drive motor / potentiometer.

The Hand Control

Figure 5. The hand control.

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Blue Phantom Manual

Description of the buttons on the hand control Storage Entry. Pressing this button in combination with the isocenter, the water surface or one of the limit buttons stores the actual detector position as isocenter, water surface or external limit. Position A. By pressing SE and this button, you can store the actual detector position for later use. Pressing this button alone moves the detector to the position which has been previously stored. Position B. By pressing SE and this button, you can store the actual detector position for later use. Pressing this button alone moves the detector to the position which has been previously stored. Position C. By pressing SE and this button, you can store the actual detector position for later use. Pressing this button alone moves the detector to the position which has been previously stored. Position D. By pressing SE and this button, you can store the actual detector position for later use. Pressing this button alone moves the detector to the position which has been previously stored. Isocenter. By pressing SE and this button, you can store the actual detector position as isocenter. Pressing this button alone moves the detector to the actual isocenter position. Water Surface. By pressing SE and this button, you can store the actual detector position as water surface. Pressing this button alone moves the detector to the actual water surface position. Upper X Limit. By pressing SE and this button, you can store the actual detector position as upper limit in X direction. Pressing this button alone moves the detector to the actual upper X limit. Upper Y Limit. By pressing SE and this button, you can store the actual detector position as upper limit in Y direction. Pressing this button alone moves the detector to the actual upper Y limit. Upper Z Limit. By pressing SE and this button, you can store the actual detector position as upper limit in Z direction. Pressing this button alone moves the detector to the actual upper Z limit. Lower X Limit. By pressing SE and this button, you can store the actual detector position as lower limit in X direction. Pressing this button alone moves the detector to the actual lower X limit. Lower Y Limit. By pressing SE and this button, you can store the actual detector position as lower limit in Y direction. Pressing this button alone moves the detector to the actual lower Y limit. Lower Z Limit. By pressing SE and this button, you can store the actual detector position as lower limit in Z direction. Pressing this button alone moves the detector to the actual lower Z limit.

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Hardware Description • 19

Detector Movement in +X direction. Pressing this key and holding it causes a slow detector movement in +X direction.

Detector Movement in +Y direction. Pressing this key and holding it causes a slow detector movement in +Y direction.

Detector Movement in +Z direction. Pressing this key and holding it causes a slow detector movement in +Z direction.

Detector Movement in -X direction. Pressing this key and holding it causes a slow detector movement in -X direction.

Detector Movement in -Y direction. Pressing this key and holding it causes a slow detector movement in -Y direction.

Detector Movement in -Z direction. Pressing this key and holding it causes a slow detector movement in -Z direction.

Fast Detector Movement. Pressing this key in combination with one of the six slow movement keys above causes a fast detector movement in the respective direction.

Switch to TMR mode. Pressing these two keys switches the Blue Phantom into TMR mode (hand control beeping). Works only if both transducer and cable to water reservoir are connected. Note: It is not required to do this before starting a TMR measurement. The software switches the Blue Phantom in TMR mode automatically. Switch to normal mode. Pressing these two keys switches the Blue Phantom from TMR mode back to normal mode (hand control stops beeping). Note: It is not required to do this after a TMR measurement. The software switches the Blue Phantom back to normal mode automatically.

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