نتایج جستجو برای: medical linear accelerator
تعداد نتایج: 1071440 فیلتر نتایج به سال:
We discuss techniques for Model-Independent Analysis (MIA) of a beamline using correlation matrices of physical variables and Singular Value Decomposition (SVD) of a beamline BPM matrix. The beamline matrix is formed from BPM readings for a large number of pulses. The method has been applied to the Linear Accelerator of the SLAC Linear Collider (SLC). submitted to Sixth European Particle Accele...
In this paper we consider properties of the central path and the analytic center of the optimal face in the context of parametric linear programming. We rst show that if the right-hand side vector of a standard linear program is perturbed, then the analytic center of the optimal face is one-side di erentiable with respect to the perturbation parameter. In that case we also show that the whole a...
Radiation necrosis is a known sequela of delivering high doses of ionizing radiation to the central nervous system and may be confused with tumor recurrence. Although stereotactic radiation has found increasing application in managing central nervous system malignancies, the imaging appearance of benign tissue several years after such treatment has not been frequently documented in the medical ...
Radiotherapy is the second most frequent type of cancer treatment after surgery and before chemotherapy. Its aim is to deliver a lethal dose to the tumour with high-energy X-rays produced by a medical linear accelerator, while sparing surrounding healthy tissue. To improve the effectiveness of X-rays, the treatment is fractioned in several sessions (e.g. five sessions per week during six or sev...
Monte Carlo method is the most accurate method for simulation of radiation therapy equipment. The linear accelerators (linac) are currently the most widely used machines in radiation therapy centers. Monte Carlo modeling of the Siemens Primus linear accelerator in 6 MeV beams was used. Square field size of 10 × 10 cm2 produced by the jaws was compared with TLD. Head simulation of Siemens accele...
The purpose of electron linear accelerator project in Institute for Research in Fundamental Sciences (IPM) has been to design and construct a S-band electron linear accelerator in such a way that all its parts be designed and built in Iran as much as possible. For more detailed evaluations and assurance, a cooper accelerating tube with the exact same specification of the main accelerating tube ...
Measurements of the spatial and temporal coherence of single, femtosecond x-ray pulses generated by the first hard x-ray free-electron laser, the Linac Coherent Light Source, are presented. Single-shot measurements were performed at 780 eV x-ray photon energy using apertures containing double pinholes in "diffract-and-destroy" mode. We determined a coherence length of 17 μm in the vertical dir...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید