Modern Hadron Therapy Gantry Developments
16th Jan 2014
IBA ProteusONE
Protect, Enhance, and Save Lives
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THE TREND: MORE COMPACT, CHEAPER
Access to PT is key
ProteusPLUS
18000 ft² / 1672 m²
ProteusONE
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* ImageGuided PT
Patient and staff-friendly
open environment
The early concept
Protect, Enhance, and Save Lives
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TREATMENT MODE SPECIFICATIONS
Treatment mode
Type
Field size
Patching fields
Distal fall-off
Lateral Penumbra (spot size)
Several Spot Tune ID
Treatment time
Dose Accuracy
SAD
Range and modulation
Accessory Holder
Active Scanning allowing at least lateral multiple repainting and potentially volumetric
repainting
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)
Yes (and well managed by TPS and PTS)
Maximum 2 mm above physical limit
No degradation compare to Proteus 235
Yes to increase the spot size when needed (same Proteus 235)
No degradation compare to Proteus 235 / at least (1 liter, 2 min, 2 gray) and the goal will
remain at 1 min
No degradation compare to Proteus 235
At least 2 m
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.
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
18000 ft² / 1672 m²
ProteusONE
3600 ft² / 334 m²
Development
Protect, Enhance, and Save Lives
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IT STARTED WITH OPTICS…
Combining ESS and gantry was never done before
D
E
G
R
Q
1
G
1
Q
2
G
1
P
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G
1
B
1
G
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Q
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G
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P
2
G
1
Q
4
G
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Q
5
G
1
Q
6
G
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7
G
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P
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G
1
B
2
G
1
B
2
G
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B
3
G
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I
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1
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S
O
C
Doubly achromatic
Dispersion: ~3 cm/%
SS
LL
II
XY
S
L
I
T
S
C
A
N
… 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:
œ
Rotating quads, stronger than standard quads
œ
Scanning magnets
œ
Bending magnets models
œ
Spot size vs. scan angle and magnet crosstalk!
˜
Gantry structure
˜
Impact on instrumentation
œ
Stray fields
MT23
Poster & article
AT A GLANCE
Scan magnets and quads
˜
Scanning magnets
œ
Combined XY vs. twins
Compactness, field quality & power consumption
=> Two magnets selected
˜
Entrance rotating quads optimization
œ
Small diameter
œ
Grooves are for pipings
AT A GLANCE
Bending magnets
œ
40°- 70°: 1.5 m radius, small gap, 1.53 T, #blocks
œ
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!
Patient experience
(colors)
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PATIENT CHOOSES THEME
Welcome
MEDICAL ENV. AS USUAL
Set-up
Prepare
Irradiation
PATIENT CHOOSES THEME
Welcome
THE PATIENT CHOOSES !
Set-up
Prepare
Irradiation
PATIENT CHOOSES THEME
Welcome
DESIGNED FOR KIDS
Set-up
Prepare
Irradiation
Integration
Belgium - Shreveport
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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
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SHREVEPORT RIGGING
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Shreveport Rigging
SHREVEPORT RIGGING
Protect, Enhance, and Save Lives
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Shreveport Rigging
SHREVEPORT RIGGING
Protect, Enhance, and Save Lives
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SHREVEPORT RIGGING
Protect, Enhance, and Save Lives
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SHREVEPORT RIGGING
Protect, Enhance, and Save Lives
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SHREVEPORT RIGGING
Protect, Enhance, and Save Lives
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SHREVEPORT RIGGING
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Integration
Beam tests started
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MECHANICS & ROTATION
1ST BEAM @ISOCENTRE
End December 2013 - On second shift because of an unfortunate beam dump!
CURRENT STATUS
˜
Now, we’re busy with
œ
œ
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