نتایج جستجو برای: megavoltage energy lung cancer
تعداد نتایج: 1754512 فیلتر نتایج به سال:
objective: people are usually susceptible to carcinogenic aromatic amines, present in cigarrette smoke and polluted environment, which can cause dna damage. therefore, maintenance of genomic dna integrity is a direct result of proper function of dna repair enzymes. polymorphic diversity could affect the function of repair enzymes and thus augment the risk of different cancers. xeroderma pigment...
background: several epidemiological studies conducted on underground miner’s show that exposure to elevated levels of radioactive radon gas is expected to increase the risk of lung cancer. relative risk of lung cancer is almost linear with radon exposure. elevated concentrations of radon are not only reported within mines but also for closed indoor environment of general public houses. measurem...
objective: using megavoltage photons generated by medical linear accelerator is a common modality for the treatment of malignant. the crucial problem for using photon beams >8mv is the photoneutron yields that increase the risk of secondary cancer that treated with high-energy photon beams. the contaminated neutrons produced in different components of the accelerator head and rely on many param...
PURPOSE Ghrelin, a novel growth hormone-releasing peptide,has been shown to cause a positive energy balance by stimulating food intake and inducing adiposity. We sought to investigate the pathophysiology of ghrelin in cachexia associated with lung cancer. EXPERIMENTAL DESIGN Plasma ghrelin level was measured in 43 patients with lung cancer and 21 control subjects. Patients with lung cancer we...
The major cause of cancer-related deaths is due to lung cancer. Lung cancer is caused by various abnormalities and one such abnormality is the lung nodule. When these lung nodules are detected at an early stage the survival rate is improved. CT image is having a large no of slices of images which makes the manual diagnosis a tedious process. It also takes a large time and energy of the radiolog...
Introduction: Occupational exposure to crystalline silica increases the risk of lung cancer and restrictive lung disease with extensive fibrosis. Silica dust is a major health hazard in foundry factories. The aim of this study was to determine core making workers’ exposure to respirable crystalline silica dust in a foundry factory. Material and Method: This cross-sectional study was conducte...
Background & Aims: Lung cancer as the most common cancer leads to 30% and 26% of deaths in men and women, respectively. Most patients with lung cancer are diagnosed in advanced stages, so their surgical procedures are not often successful. Therefore, early diagnosis has the key role in treatment and life expectancy of patients. The aim of this study was to determine sensitivity, specificit...
Abstract Background: Several single nucleotide polymorphisms have been found in CYP1A1 gene and it was reported that C allele in T/C gene polymorphism is associated with lung cancer. Current study investigates interaction between cigarette factor and C/T polymorphism in the m1 locus. Methods: Present study is a case-control and retrospective study. T/C polymorphism in 112 patients with lung...
cancer starts with a change in one single cell. this change may be initiated by external agents and genetic factors. cancer is a leading cause of death worldwide and accounts for 7.6 million deaths (around 13% of all deaths) in 2008. lung, stomach, liver, colon and breast cancer cause the most cancer deaths each year. in this review, different aspects of gastric cancer; including clinical, path...
Dichloroacetate (DCA) as a small, cheap and available anticancer agent, is a pyruvate mimetic compound that stimulates the activity of pyruvate dehydrogenase (PDH) enzyme through inhibition of pyruvate dehydrogenase kinases (PDHK1-4). DCA turns on programed cell death (apoptosis) which suppressed in tumor cells and therefore inhibits tumor growth. DCA also interferes with the glucose uses of ca...
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