R&D of emulsion technology to study fragment interaction to improve ion therapy
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1 FJPPL R&D of emulsion technology to study fragment interaction to improve ion therapy Imad Laktineh (Lyon)/ Kimio Niwa (Nagoya University) Toshiyuki Toshito (KEK)
2 Japanese-French collaboration on fragmentation study More than 3000 patients have been treated with carbon ion therapy at NIRS in Japan since France is joining the club of countries with hadron therapy machines étoile project to be realized in Lyon. Fragmentation study is crucial to limit the damage of safe tissue The energy range of such machines is of few 100 MeV/n NIRS-HIMAC facility provides MeV/n energy ions beam GANIL facility provides few to 100 MeV/n energy ions beam Tools to study the fragmentation are available in both countries. They are complementary.
3 Japanese-French collaboration on fragmentation study The project we submit will help to finance French-Japanese meetings to discuss the improvement of the detection techniques. PhD students stays for short periods in France and Japan.
4 Heavy ion therapy a few 100MeV/n 12 C beam Ref. Relative Dose (%) proton X-ray γ-ray neutron carbon Depth - Human Body (cm) 15 Amaldi and Kraft Rep.Prog.Phys (2005)
5 Understanding of fragmentation reactions is very important for dose calculation. But measurement of cross sections are scarce. Carbon ion therapy Relative dose MeV/n 12 C beam Bragg peak Dose by fragments (tail dose) Dose in body Depth (cm)
6 150μm 4π tracking device with 3D resolution of ~1μm Possible to detect and identify all charged secondary particles Capable of event by event analysis 12 C 180MeV/u Carbon fragmentation in nuclear emulsion
7 Emulsion Scanning Facility in Nagoya in Lyon
8 Goal of project To collect data of heavy ion interactions with tissue equivalent material such as water and other materials which constitute human body such as C, N, Ca, P in the energy region from ~10 to 400 MeV/n Beam: He, Li, Be, B, C, N, O, Ne To provide reaction database and validate physics models
9 Activity in Japan NIRS-HIMAC (Chiba in Japan) P152 experiment Organization: 12 institutes from HEP, medical and space domains Nagoya Univ. Emulsion Toho Univ. Aichi Univ. of Educaiton Kobe Univ. High Energy Accelerator Research Organization (KEK) Geant4 Ritsumeikan Univ. Naruto Univ. of Education SLAC Medical National Institute of Radiological Science (NIRS) Gunma Univ., Faculty of Medicine Space Japan Aerospace Exploration Agency (JAXA) Univ. of Tokyo Projected started in 2003
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11 Physics run with 400 MeV/n 12 C and water NIRS-HIMAC Stopping point of carbon 65layer beam 30cm
12
13 Track and vertex reconstruction after emulsion read-out: NETSCAN 12 C Beam ~10000 particles ~4000 interactions 3 month to take this data by UTS 2.5cm 25cm
14 Pulse heights Z=1 Z 2 Film B: desensitized Z=2 Z=3 Z=4 Z=6 Z=5 Film A: sensitive for M.I.P. Film D: desensitized
15 A.N.Golovchenko et al., PRC (2002) Carbon-Water charge-changing cross sections I.Schall et al., NIM B (1996) Phys. Rev. C (2007) Important to calculate tail dose Sihver s model MC Geant4 Our results preliminary A.N.Golovchenko Our results preliminary Production of B as projectile-like fragments Production of Be as projectile-like fragments preliminary Production of Li as projectile-like fragments preliminary A.N.Golovchenko Our results Our results
16 Angular distributions of H and He fragments Important to calculate tail and lateral dose MC Geant4 H He MC Geant4 preliminary preliminary Data Data tanθ tanθ
17 Detection of 8 Be Small Q-value :~90keV Opening angle between twoα< 20mrad α 12 C 8 Be α cτ~10nm Target Opening angle between two He (Z=2) ~400events preliminary 20mrad tanθ
18 Detection of 9 B cτ~0.1nm 12 C 9 B 9 B 8 Be+p 2α Small Q-value :~200keV Target cτ~10nm 8 Be Opening angle between α and p < 30mrad Opening angle between He and H after cut: tanθ( two He)<0.02 ~80events preliminary α α p 30mrad tanθ
19 9 B candidate Side-view 12 C 350MeV/n He H He 25cm H Top-view He HeH 12 C 350MeV/n H
20 R&D in Japan in the near future Data taking for various targets (C, Ca, P etc.) measurement of neutron flux isotope (mass) identification by magnetic field
21 Tracking test in magnetic field 248mm B 1T 18.3cm mm 3 Toho university z 180MeV/n 12 C 3.0cm ~1000 tracks x This technique can be applied to identify mass of fragments.
22 French Scanning Facility in Lyon 4 scanning systems developed for OPERA Automatic High speed Sub micrometric precision 1 system is dedicated to R&D and biomedical application
23 Activities Particle identification with nuclear emulsion using de/dx : High sampling technique, complementary to the technique used in Nagoya scanning systems and can be used to identify fragmentation products 16 tomographic view 1 view / 1 μm
24 π/p separation (data taken by Lyon system) by Nagoya system Remaining particle 400, 800, 1000, 2000 MeV/c pions 2000 MeV/c protons Proton 1000 MeV/c Proton 800 MeV/c Proton 400 MeV/c MANAI Kais
25 Activities CR39 scanning for dosage uniformity ions identification CR39 can be complementary to the nuclear emulsion and can play the role of biological tissue Hybrid detectors combining emulsion and CR39 can be considered in the near future to improve particle identification.
26 Activities Geant4 simulation of the fragmentation process Ions beam exposure to biological tissues using GANIL facility fragments identification using different techniques Model validation
27 MC Geant4 12 C (80 MeV/n) Dose profile neutrons nuclear reactions Depth (cm) gammas MC Geant4 13 C (80 MeV/n) ~1/10 of the ions fragment
28 Summary R&D of emulsion technology and physics data taking in high energy region (>100MeV/n) has been performed using NIRS- HIMAC in Japan since R&D in low energy region (<100MeV/n) was started using GANIL in France in Wider energy range can be obtained by using the different beams available in both countries (GANIL, NIRS) to study a variety of targets. We will provide heavy ion reaction database to improve heavy ion therapy.
29
30 Etoile project This is a heavy ions therapy machine project approved this year (13 Feb 2007). The center will be built in the Lyon region (Rhone-Alpes Alpes). It intends to treat 1000 patients by year. The first patients should be treated > 2010.
31 Gold deposition development for charge identification in lower energy region <200MeV/n R&D by H. Kubota (Nagoya)
32 XAA dev. Gold deposition dev. Carbon track 203[MeV/u] M.I.P GD [/100micron] 100 C B 80 Be Li de/dx [MeV cm2/g]
33
34
35 C-Water event by event analysis in MeV/n -Observation of 8 Be and 9 B
36 Opening angle between ~400events observed two He(Z=2) preliminary Opening angle between two He(Z=2) 20mrad tanθ Just for comparison preliminary Opening angle between two H(Z=1) tanθ
37 Opening angle between He and H All events preliminary Opening angle between two H and He aftercut: tanθ(two He)<0.02( 8 Be-decay) ~80events preliminary 30mrad tanθ
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39 French Scanning Facility in Lyon
40
41 Heavy ion therapy in the world LBL,Barkeley in US in the beginning of 1970s -> stopped HIMAC at National Institute of Radiological Sciences (NIRS) in Japan More than 3000 patients have been treated since 1994 GSI in German from 1997 Number of facility is increasing in Europe and Japan.
42 8 Be candidate 12 C 300MeV/n He He Opening angle between two He (Z=2) ~400events He preliminary 20mrad tanθ
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