Design of a Brand new Tracking Device for On-line Dose Monitor In Ion …

Charged Particle Therapy is a technique for cancer remedy that exploits hadron beams, principally protons and iTagPro smart device carbons. A important situation is the monitoring of the dose released by the beam to the tumor and to the encircling tissues. We current the design of a brand new tracking iTagPro smart device for monitoring on-line the dose in ion therapy via the detection of secondary charged particles produced by the beam interactions in the affected person tissues. Actually, the charged particle emission shape can be correlated with the spatial dose launch and the Bragg peak position. The detector uses the knowledge supplied by 12 layers of scintillating fibers adopted by a plastic scintillator ItagPro and iTagPro smart device a small calorimeter made by a pixelated Lutetium Fine Silicate crystal. Simulations have been carried out to guage the achievable spatial resolution and a possible utility of the machine for the monitoring of the dose profile in a real treatment is introduced.

Keywords: Hadron therapy; Real time monitoring; Particle detection. Compared to the standard X-rays treatments the primary advantage of this system is the better localization of the irradiated dose within the tumor region sparing healthy tissues and attainable surrounding organs. This because charged particles unfastened most of the energy at the tip of their path, within the Bragg peak, whereas X-rays exponentially release their vitality with the penetration in matter. As much as now most patients have been treated with proton beams, however use of carbon beams has lately started in Europe. The carbon beam produces higher energy, extra ample secondary expenses with respect to the proton beam. The neutral immediate part is experimentally extra difficult but it's pretty produced additionally in proton treatments. The brand new gadget we are proposing has been designed to function as a charged particle tracker however in addition is succesful to reconstruct prompt photons (by way of Compton interaction or pair production). The detector is composed by 6 planes of orthogonally placed scintillating fiber layers followed by a plastic scintillator and a small calorimeter fabricated from LFS (Lutetium Fine Silicate) crystals.

Figure 1 reveals a scheme and an image of the detector. Figure 2 reveals the precept of reconstruction for a charged particle and for iTagPro smart device a photon (via a Compton interplay) that enter the detector. The final design is a compromise between compactness, iTagPro product necessary because of the space limitations in a treatment room, iTagPro smart device and huge geometrical acceptance, which increases the reconstruction efficiency. The amount of material is minimized with a purpose to contain the multiple Coulomb scattering of tracks that limits observe angular decision. In an effort to optimize the charged particle detection the choice of the angle of the detector axis with respect to the beam route is crucial. At narrow angles there's the advantage that the emission flux is enhanced and the charged particle energy is larger (thus the multiple scattering is minimized). Then again, because of the projection on the beam line, the spatial resolution on the emission form worsens and for angles completely different from ninety °the emission form is convoluted with the transverse beam spot size projected on the beam line.

12C ions at 220 MeV/u is still related: from 1.Three 10-2 particles/primary at 60 ° to 2.7 10-3 particles/primary at ninety °. We consider two configurations, with the detector axis at 90 ° and 60 ° with respect to the beam route. The prompt photon reconstruction shouldn't be discussed on this paper. The PET detector just isn't described right here. The paper is organized as follows: Section 2 describes the detector whereas Section 3 describes the simulation, iTagPro smart device the occasion reconstruction algorithms and a way to observe the dose profile in a real remedy. Section 4 stories the detector performances and the results of the proposed methodology applied to a specific case. Section 5 discusses the results and the prospects and Section 6 presents the conclusions. The tracker is composed of six planes each product of two orthogonally positioned scintillating fiber layers (384 fibers every) to supply bi-dimensional view. 2 (multi-cladding BCF-12 from Saint-Gobain) with the minimal airplane separation (2 cm) necessary to accommodate the front-finish electronics readout, so as to extend the geometrical acceptance and the compactness of the detector.