collaboration umc st radboud - riso andré minken
TRANSCRIPT
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Collaboration Collaboration UMC St Radboud - RISOUMC St Radboud - RISO
André Minken
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Highlights
Approach project team
Report/conclusions project team
Time frame CPAC
Indications and number(s) of patients
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Advantages proton therapy
Proton dose distribution is highly conformal
Integral dose reduces by a factor of 2 to 3
No exit dose
Sharp penumbra (until ±17cm)
Protons are direct ionizing
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initiatives in:Groningen, Maastricht,West-
Nederland
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Proton Therapy Center – MD Anderson CC, Houston
Passive Scattering Ports
Pencil Beam Scanning Port
Large Field Fixed Eye Port
Experimental Port
Accelerator System
PTC-H3 Rotating Gantries1 Fixed Port1 Eye Port1 Experimental Port
Hitachi, Ltd.
M. Bues (MDACC)
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Single room solution
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initiatives in:Groningen, Maastricht,West-
Nederland
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initiatives in:Groningen, Maastricht,West-
Nederland
Protons in
Eastern part
of the Netherlands
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Contact CPAC RISO 2008
RISO internal discussion
Possibilities and pitfalls
State of the art proton therapy
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Internal meeting RISO 2008
”RISO will not succeed on its own…”
Collaboration with academic partner in the Eastern part of the Netherlands
Second step: extension to other participants
Contact with UMC St.Radboud (june 2009): installation of project team
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Project teamProton treatment in East of the Netherlands
Paul Bouma,RTO RISO, o.a. Head and neck oncologyJan Bussink, RTO UMCN, o.a. Pulmonary oncologyGeert Jansssens, RTO UMCN, o.a. Pediatric oncology Hans Kaanders, RTO UMCNKarin Muller, RTO RISO, o.a. GE oncology Henk Huizenga, head Med Phys UMCNMartina Kunze-Busch. Med Phys UMCNMartijn Kusters, Med Phys resident UMCNAndré Minken, head Med Phys RISORené Monshouwer, Med Phys UMCNRik Westendorp, Med Phys RISO
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Agenda project team
Juli 3, 2009, NijmegenAgenda:kick-off meeting Huizenga, Monshouwer en Minkendiscussion on subjects and timeframe
September 28, 2009, Deventer, guest dr. M. Engelsman, head of
medical physics Francis H. Burr protoncentrum in Boston.
Agenda:Introduction (dr. A. Minken)
Radiotherapy planning of protons, (dr. M. Engelsman)
Dosimetrical aspects of protonplanning (dr. H. Huizenga)Indications (K. Muller)
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December 4, 2009 NijmegenAgenda:Background protonaccelerators (dr. M. Kusters)Concept Dielectric Wall Accelerator (dr. R. Monshouwer)Overview of national timeframe (dr P. Bouma)Boston visit, highlights (dr G. Janssens)
Februari 12, 2010 protoncourse LeidenAgenda:All aspects of “conventional” protonfacilities
Februari 17, 2010 visit CPAC Deventer
Prof. R. Mackie, S. Guse en G. OliveiraAgenda:DWA-protonaccelerator: technical stepsProduct development: timeframe
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Report: UMC St. Radboud - RISO in april 2010
June 2010, Nijmegen, Regional meeting
September 2010, Nijmegen, National meeting
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Conclusions report
• Feasible, critical evaluation of resources,
comparison with photon techniques
• Collaboration
• State of the art
• Indications
• Number of patients
• Scientific input: universities Nijmegen and Twente
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State of the art techniques
Comparison with IMRT not 3D-CRT Pretreatment imaging on high level Set up and fixation Imaging on treatment machine IMPT (active scanning) Learn from experienced users
•Patching around OARs•Movement compensation•Fixations•Treatment planning techniques
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Comparison with IMRT not 3D-CRTProton therapy, a small step ahead?
Source: Anthony J. Lomax et al. Radiotherapy and Oncology 51 (1999) 257-271
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Pretreatment imaging on high levelTarget delineation Steenbakkers et al.
Radiother Oncol. 2005; 77:182-90
•PProtons: Reduced proximal and zero distal dose
•T
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0 5 10 15 20 25 30Depth (cm)
Do
se
(%
)
Photon (10MV)
Proton SOBP (18cm)
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IMPT (active scanning)
Passive scattering
Spot scanning
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CPAC timeframe
fixed beam 120-150 MeV (2013)
+3 years gantry based systeem 200 MeV
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“Signalement Gezondheidsraad” Proton treatmentIndications
Standard
Potential
Model based
Reduction of second malignancies
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Number of patients
• Region: Eastern part of the Netherlands patient population: 16% of the Netherlands
• Start with Fixed-beam 120-150 MeV
• End situation rotating 200 MeV beam
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120 – 150MeV
200 MeV RCT’s
Standard 57 57 57
Potential 8 10 187
Model based 284 655 655
Second malignancies 101 117 117
450 839 1016
Number of Patients
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•CPAC offers a potential chance for proton therapy in the eastern part of the Netherlands at reasonable costs
•Collaboration RISO & UMC St. Radboudo MSTo ARTIo Isala klinieken
•Scientific input universities Nijmegen and Twente
Conclusions
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1010D
010C
100B
00A
SetupError
movement
Courtesy of M. Engelsman
A B C D
E F G H
Isodoses: 50%, 80%, 95% en 100%
Tumormovement
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Depth
Do
se
Depth
Do
se
Raw Bragg Peak (RBP) Spread-Out Bragg Peak (SOBP)(poor rich man’s IMRT)
5 mm
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Photon versus Proton
+ Less dose
+ Less dose
+ Skin sparing
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0 5 10 15 20 25 30Depth (cm)
Do
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(%
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Photon (10MV)
Proton SOBP (18cm)
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