نتایج جستجو برای: radiobiological studies
تعداد نتایج: 1427061 فیلتر نتایج به سال:
Purpose: Stereotactic body radiation therapy (SBRT) has emerged as a standard treatment modality for medically inoperable early-stage lung cancer patients. The aim of this paper is to calculate radiobiological parameters for a sample of 39 patients who underwent lung SBRT. Materials and Methods: For SBRT, a typical regimen of 50 Gy in 4 5 fractions results in local tumor control rates around 99...
Abstract Recent oncological studies identified beneficial properties of radiation applied at ultrahigh dose rates, several orders magnitude higher than the clinical standard order Gy min –1 . Sources capable providing these rates are under investigation. Here we show that a stable, compact laser-driven proton source with energies greater 60 MeV enables radiobiological in vivo studies. We perfor...
M. H. SEEGENSCHMIEDT, MD Professor, Dept. of Radiation Oncology and Therapeutic Radiology, Alfried Krupp Hospital, Alfried Krupp Strafle 21, 45117 Essen, Germany 9.5.3 Radiotherapeutic Management 174 9.5.3.1 Radiobiological Rationale 175 9.5.3.2 Radiotherapy Technique 176 9.5.3.3 Results of Radiotherapy in Morbus Dupuytren I77 9.5.3.4 Possible Risks of Radiotherapy 178 9.5.3.5 Own Clinical Resu...
Radiobiological limitations for dose escalation in external radiotherapy are presented. Biological and clinical concept of brachytherapy boost to increase treatment efficacy is discussed, and different methods are compared. Oncentra Prostate 3D conformal real-time ultrasound-guided brachytherapy is presented as a solution for boost or sole therapy.
a large number of single research studies on the effects of strategy-based instruction (sbi) in teaching english as a foreign or second language has been conducted so far. however, the lack of a comprehensive meta-analysis targeting the effectiveness of english language sbi is observed. moreover, the findings of experimental studies regarding the context of the english language, proficiency lev...
BACKGROUND Although two-dimensional (2-D) monolayer cell cultures provide important information on basic tumor biology and radiobiology, they are not representative of the complexity of three-dimensional (3-D) solid tumors. In particular, new models reproducing clinical conditions as closely as possible are needed for radiobiological studies to provide information that can be translated from be...
Nuclear emulsions of the Ilford K series, exposed to X-rays from 15 to 150 kVp and systematically underdeveloped, exhibit supralinear blackness--exposure curves ranging from 1- to 4-hit in character, and whose shape is the same at all excitation voltages. Processing can be so adjusted that the curve shape is well represented by the alpha--beta model, and matches an experimental dose--response c...
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