Modern Hadron Therapy Gantry Developments 16th Jan 2014
Protect, Enhance, and Save Lives - 2 - IBA ProteusONE
THE TREND: MORE COMPACT, CHEAPER Access to PT is key ProteusPLUS ProteusONE 18000 ft² / 1672 m² 3600 ft² / 334 m²
PROTEUS ONE, THE SAFEST WAY TO COMPACT IMPT Proven Proteus PBS Technology IGPT - Enabled Patient and Staff Centric ALARA Neutron Sources Shielded Small footprint Patient and Staff Centric Pencil Beam Scanning
PROTEUS ONE, THE SAFEST WAY TO COMPACT IMPT IMPT powered by PBS 3D Cone-Beam CT* Image- Guided PT Patient and staff-friendly open environment
Protect, Enhance, and Save Lives - 6 - The early concept
TREATMENT MODE SPECIFICATIONS Treatment mode Type Active Scanning allowing at least lateral multiple repainting and potentially volumetric repainting Field size 20 cm X 20 cm minimum à 20 X 25 cm ideally with 25 cm in the Y direction (// to the axis of the GTR or horizontal in a FBR) Patching fields Yes (and well managed by TPS and PTS) Distal fall-off Maximum 2 mm above physical limit Lateral Penumbra (spot size) No degradation compare to Proteus 235 Several Spot Tune ID Yes to increase the spot size when needed (same Proteus 235) Treatment time No degradation compare to Proteus 235 / at least (1 liter, 2 min, 2 gray) and the goal will remain at 1 min Dose Accuracy No degradation compare to Proteus 235 SAD At least 2 m Range and modulation Max range is 32 gr/cm² Min range will be 0.5 g:cm² with the use of accessories for ranges lower than 7.5 gr/cm² and to keep the width of any proton peak always equal or greater than 5 mm. Accessory Holder An accessory drawer must be installed at the end of the nozzle It will be remotely controlled as to a) tune the distance between the drawer and isocenter b) insert / retract the accessory in the beam path
The Early sketch (Summer 2009)
SCANNING PROPERTIES Final magnet EFB at 120 cm from patient Combined scanning magnet upstream Treatment field of 22 x 25 cm at isocenter Pole faces of the 60 magnet adjusted to have an identical SAD of 3.15 m in both H & V planes (changed later) Ion chambers and telescopic accessory drawer on the exit of the last 60 dipole
ProteusPLUS 1 ROOM ONLY provides simplification opportunities 55.8 ft / 17 m 62.3 ft / 19 m
COMBINING THE ESS IN THE GANTRY
SIZE COMPARISON ProteusPLUS ProteusONE 18000 ft² / 1672 m² 3600 ft² / 334 m²
Protect, Enhance, and Save Lives - 13 - Development
IT STARTED WITH OPTICS Combining ESS and gantry was never done before Q 1 G 1 Q 2 G 1 B 1 G 1 Q 3 G 1 Q 4 G 1 Q 5 G 1 Q 6 G 1 Q 7 G 1 B 2 G 1 B 2 G 1 B 3 G 1 D E G R P 1 G 1 S L I X S L I Y P 2 G 1 S L I T P 4 G 1 S C A N I C 1 I S O C Doubly achromatic Dispersion: ~3 cm/%
AND A FIRST LARGE GAP MAGNET MODEL Upstream scanning was new to IBA This magnet is key for gantry dimensioning (and power)
IT QUICKLY BECAME MORE COMPLICATED «Compact» also means new problems to solve New magnets: Rotating quads, stronger than standard quads Scanning magnets Bending magnets models Spot size vs. scan angle and magnet crosstalk! MT23 Poster & article Gantry structure Impact on instrumentation Stray fields
AT A GLANCE Scan magnets and quads Scanning magnets Combined XY vs. twins Compactness, field quality & power consumption => Two magnets selected Entrance rotating quads optimization Small diameter Grooves are for pipings
AT A GLANCE Bending magnets 40-70 : 1.5 m radius, small gap, 1.53 T, #blocks 60 : 1.6m radius, large gap, 1,4 T
INTEGRATED INTO GANTRY It is crowded but everything fits in
IN THE MEANTIME Industrialization Subcontracting Integration of imaging V&V as well as QC procedures Patient enclosure Procurement plan for the next ones!
Protect, Enhance, and Save Lives - 21 - Patient experience (colors)
PATIENT CHOOSES THEME MEDICAL ENV. AS USUAL Welcome Set-up Prepare Irradiation
PATIENT CHOOSES THEME THE PATIENT CHOOSES! Welcome Set-up Prepare Irradiation
PATIENT CHOOSES THEME DESIGNED FOR KIDS Welcome Set-up Prepare Irradiation
Protect, Enhance, and Save Lives - 25 - Integration Belgium - Shreveport
ASSEMBLY, MECHANICS AND INTEGRATION IN BELGIUM Mechanics integration, GRF, cabling, testing shipping in a single box
TRANSPORT AND RIGGING Shipment in October 13 - Here s the box
SHREVEPORT RIGGING Protect, Enhance, and Save Lives - 28 -
SHREVEPORT RIGGING Protect, Enhance, and Save Lives - 29 -
Shreveport Rigging SHREVEPORT RIGGING Protect, Enhance, and Save Lives - 30 -
Shreveport Rigging SHREVEPORT RIGGING Protect, Enhance, and Save Lives - 31 -
SHREVEPORT RIGGING Protect, Enhance, and Save Lives - 32 -
SHREVEPORT RIGGING Protect, Enhance, and Save Lives - 33 -
SHREVEPORT RIGGING Protect, Enhance, and Save Lives - 34 -
SHREVEPORT RIGGING Protect, Enhance, and Save Lives - 35 -
Protect, Enhance, and Save Lives - 36 - Integration Beam tests started
MECHANICS & ROTATION
1ST BEAM @ISOCENTRE End December 2013 - On second shift because of an unfortunate beam dump!
CURRENT STATUS Now, we re busy with models vs. experiment crosschecks (we have to deal with ESS = losses along the line => beam size) Approvals and commisionning (CGBL FDA filing OK) => Multi-site, multi department and interdisciplinary teamwork 1st patient expected before ASTRO 2014 which means: exactly 5 years after first concept drawings!
THANK YOU FOR YOUR ATTENTION