نتایج جستجو برای: radiation tolerance
تعداد نتایج: 361524 فیلتر نتایج به سال:
Neoplasms of the central nervous system (CNS) are a pathologically diverse group of benign and malignant tumors for which a variety of management strategies, including observation, surgery, radiation therapy, and/or chemotherapy, are employed. Shown in Table 1 are the usual radiation doses used to treat primary and metastatic brain and spinal cord tumors, which span a broad range of total doses...
as technology scales deep into the nanometer regime, on-chip communication becomes more susceptible to transient noise sources, such as crosstalk, external radiation, and spurious voltage spikes. the network on chip s modularity and reusability has brought about the use of error control methods to address transient errors in network on chip links.in this work, we design a fault tolerance router...
Silicon photonics (SiPh) shows considerable potential as a radiation-hard technology for building the optical data transmission links future high-energy physics (HEP) experiments at CERN. Optical modulators are key component of links, which will need to withstand radiation doses in excess 10 MGy. The geometrical parameters and doping concentrations two popular types SiPh modulators, Mach–Zehnde...
Radiotherapy is not currently informed by the genetic composition of an individual patient's tumour. To identify genetic features regulating survival after DNA damage, here we conduct large-scale profiling of cellular survival after exposure to radiation in a diverse collection of 533 genetically annotated human tumour cell lines. We show that sensitivity to radiation is characterized by signif...
HE characteristics of mutational damage recovered from spermatogonial cells Tare important for considerations of genetic risks from radiation. The genetic and cytological types of mutations recovered from spermatogonia determine the chances of genetic damage offered the ensuing populations. To study these characteristics, radiation studies were carried out in Drosophila where well defined genet...
A reliable and reproducible method to automatically characterize the radiation sensitivity of macromolecular crystals at the ESRF beamlines has been developed. This new approach uses the slope of the linear dependence of the overall isotropic B-factor with absorbed dose as the damage metric. The method has been implemented through an automated procedure using the EDNA on-line data analysis fram...
Background: The development of intensity-modulated radiotherapy (IMRT) has revolutionized the management of nasopharyngeal carcinoma (NPC). The purpose of this study was to investigate the impact of clinical stage on radiation doses to organs at risk (OARs) in NPC. Material and Methods: One hundred and forty-eight patients with newly diagnosed and untreated NPC were prospectively enrolled. Base...
UV exposure suppresses the immune response to a variety of microbial, fungal, and viral Ags. In addition, UV radiation is a complete carcinogen and the immune suppression induced by UV radiation is a major risk factor for skin cancer induction. In this study, we examined the mechanisms underlying the induction of immune suppression and tolerance induction by UV radiation. Transferring lymph nod...
Normal tissue complication probability (NTCP) results were detailed in the July 2001 issue of Seminars in Radiation Oncology for conventionally fractionated radiation therapy. After 7 years, an extensive collection of stereotactic ablative body radiotherapy (SABR) or stereotactic body radiation therapy (SBRT) dose-tolerance limits was presented in the October 2008 issue of Seminars in Radiation...
where S is the survival ratio (number of plaque forming phage particles after exposure to a dose D of radiation) /(number of plaque-forming phage particles before exposure), and R is the radiosensitivity of the phage (for a recent discussion of this subject, see Pollard, 1954). The radiosensitivities of a number of bacteriophage species have been measured, and are presented here and compared wi...
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