Three Gas-Electron-Multiplier tracking detectors with an active area of 10 cm × 10 cm and a two-dimensional, laseretched orthogonal strip readout have been tested extensively in particle beams at the Meson Test Beam Facility at Fermilab. These detectors used GEM foils produced by Tech-Etch, Inc. They showed an efficiency in excess of 95% and spatial resolution better than 70 μm. The influence o...

Motion mitigation strategies are needed to fully realize the theoretical advantages of scanned ion beam therapy for patients with moving tumors. The purpose of this study was to determine whether a new four-dimensional (4D) optimization approach for scanned-ion-beam tracking could reduce dose to avoidance volumes near a moving target while maintaining target dose coverage, compared to an existi...

A. Bercuci1,3, M. Fasel2, and M. Ivanov1 1GSI, Darmstadt, Germany; 2Technische Universitaet, Darmstadt, Germany; 3On leave from NIPNE, Bucharest, Romania The algorithm for tracking is the backbone of the reconstruction procedure of the TRD detector of the ALICE experiment at LHC at CERN. Its performance has immediate influence on other reconstruction tasks such as calibration, alignment and par...

For many years, silicon micro-strip detectors have been successfully used as tracking detectors for particle and nuclear physics experiments. A new application of this technology is to the field of particle therapy where radiotherapy is carried out by use of charged particles such as protons or carbon ions. Such a treatment has been shown to have advantages over standard x-ray radiotherapy and ...

The objective of this video protocol is to discuss how to perform and analyze a three-dimensional fluorescent orbital particle tracking experiment using a modified two-photon microscope(1). As opposed to conventional approaches (raster scan or wide field based on a stack of frames), the 3D orbital tracking allows to localize and follow with a high spatial (10 nm accuracy) and temporal resolutio...

As an essential part of the Super-FRS particle identification, GEM-TPC detector in a twin field-cage configuration will provide position information at up to 1 MHz counting rate with spatial resolution < mm and tracking efficiency >95 %. This is designed particle-beam projectiles ranging from protons uranium. The performance single newly integrated AWAGS readout electronics differential output ...

The aim of this study is the development and experimental testing of a tumor tracking method for particle radiation therapy, providing the daily respiratory dynamics of the patient's thoraco-abdominal anatomy as a function of an external surface surrogate combined with an a priori motion model. The proposed tracking approach is based on a patient-specific breathing motion model, estimated from ...

BACKGROUND Scanned ion beam therapy of intra-fractionally moving tumors requires motion mitigation. GSI proposed beam tracking and performed several experimental studies to analyse the dosimetric precision of the system for scanned carbon beams. METHODS A beam tracking system has been developed and integrated in the scanned carbon ion beam therapy unit at GSI. The system adapts pencil beam po...

Motion tracking is an important step of the analysis of ow image sequences. However, Particle Image Velocimetry (PIV) techniques rarely use tracking methods developed in computer vision, they usually work with FFT and correlation based methods. Two major types of motion estimation algorithms exist: the optical ow and the feature based ones. Promising results have been obtained by applying optic...