SmartPhantom meeting: Wednesday 2^nd August 2019, 13:00 BST, 14:00 CEST

Notes:

Present: KL, HTL, AK, LC, MP

1. Welcome/introduction: KL
   • We introduced ourselves: Liam, design engineer (RAL); HTL, AK, KL physicists (Imperial); Monika, responsible for dosimetry/instrumentation (TUW).

2. Status of SmartPhantom preparation: HTL
   • Slides. Points noted:
     • In preparation for the exposure we may need to plan a CT of the SmartPhantom for the TPS calculation.
     • In the measurement plan we need to include:
       • An exposure with the SmartPhantom and an ionisation chamber to cross calibrate the energy reconstruction; and
       • An exposure with the SmartPhantom and the "Linx camera" to cross calibrate he position reconstruction.

3. Water phantom and preparation for beam at MedAustron: MP
   • Sample holder in water phantom;
   • water phantom, front view;
   • sample holder.

• The phantom that is being planned for the measurements is the same as that used as the basis for the SmartPhantom design.

4. Discussion and next steps
   • Ethernet is available in the research room;
   • MP: Will check the beam energy spread, perhaps as a function of energy.
   • There is a trigger signal in the research room. It seems likely that this is the synchrotron cycle-start signal. MP: agreed to check the definition of the trigger signal.
   • The electronics should go to the side of the water phantom, not behind. MP: will make a sketch of the space available for the water phantom, the SmartPhantom, and its electronics. The couch will be included in the sketch.
   • We need to develop an installation, commissioning, calibration, and exposure plan. Agreed to work on this together.
   • It is permitted to use stainless steel studding in the station supports.
   • We agreed to consider the construction of a model to allow an early fit-check.
   • What is the minimum distance from the flask that we can put the detector? We have a flask at Imperial and can begin to study this.
   • We agreed that MP: would make a sketch ('technical drawing') of the water phantom. HT: will circulate and post the water phantom specs.
   • We discussed the requirement to position the SmartPhantom accurately and to maintain its position. LC: will consider the positioning mechanism.

5. DONM
   • Standing invitation to MP to join SmartPhantom meetings. Contact with MP can be maintained by email and phone. Specific meetings can be arranged as required.

Summary of actions:

• MP: will check the beam energy spread, perhaps as a function of energy.
• MP: will check the definition of the trigger signal.
• MP: will make a sketch of the space available for the water phantom, the SmartPhantom, and its electronics. The couch will be included in the sketch.
• MP: will make a sketch ('technical drawing') of the water phantom.
• HT: will circulate and post the water phantom specs.
• LC: will consider the positioning mechanism.

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Meeting details

Teleconference

Phone details:

  UK: 08082 380274
  Austria: 0800 006612 

  PIN: 5904750902

Full list of telephone contacts may be found here.

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Agenda:

1. Welcome/introduction: KL

2. Status of SmartPhantom preparation: HTL
   • Slides

3. Water phantom and preparation for beam at MedAustron: MP
   • Sample holder in water phantom;
   • water phantom, front view;
   • sample holder.

4. Discussion and next steps

5. DONM

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