نتایج جستجو برای: megavoltage energy lung cancer
تعداد نتایج: 1754512 فیلتر نتایج به سال:
Introduction: lung cancer is the most deadly and the most expensive cancer all around the world. Limited studies have been conducted in the survey of incidence rate for lung cancer in IRAN. National report of cancer registry in IRAN (report 2008) indicates that mean value of ASR of lung cancer is 5.23 for men and women (7.09 for men and 3.38 for women). These values are so different from the va...
Tumor-targeted therapies are playing growing roles in cancer research. The exploitation of these powerful therapeutic modalities largely depends on the discovery of tumor-targeting ligands. Phage display has proven a promising high throughput screening tool for the identification of novel specific peptides with high binding affinity to cancer cells. In the present study, we describe the use of ...
INTRODUCTION Correct target positioning is crucial for accurate dose delivery in breast radiotherapy resulting in utilisation of daily imaging. However, the radiation dose from daily imaging is associated with increased probability of secondary induced cancer. The aim of this study was to quantify doses associated with three imaging modalities and investigate the correlation of dose and varying...
Introduction: lung cancer is the deadliest and the costliest cancer in the world. In this study, we have tried to compare the situation of this disease in several countries by considering the most important risk factor of lung cancer (smoking cigarette). Method: This is a comparative study, a comprehensive one which was done on lung cancer rates in four countries, Iran, Turkey, England and UAS...
Background: Epidemiological studies have probed the correlation between telomere length and the risk of lung cancer, but their findings are inconsistent in this regard. The present meta-analysis study has been carried out to demonstrate the association between relative telomere length in peripheral blood leukocytes and the risk of lung cancer using an established Q-PCR technique. Methods:...
Unlike proton therapy, conventional radiation therapy directs X-rays not only at the tumor but also unavoidably at nearby healthy tissue. Protons deliver radiation to tumor tissue while the healthy structures will be spared during proton therapy. When protons travel through matter, secondary particles like neutrons and photons are produced. It is believed that the secondary dose can lead to sec...
Summary: Adenosine through adenosine receptor have a crucial role in biology of lung cancer. Recent study indicated adenosine receptors have a crucial role in various aspect of lung cancer from cell growth and metastasis to modulation of apoptosis and it could be considered as a potential candidate for treatment of the lung cancer.
Medical electronlinear accelerators are the most practical radiotherapy facilities in cancer treatment. About 52 percent of patients are treated by these radiotherapy systems during their treatment process. However, in developing countries there are not enough systems and recent studies reported the shortage of 5000 megavoltage radiotherapy accelerators all over the world. According to internat...
The determination of the dose to organs from diagnostic x rays has become important because of reports of radiation injury to patients from fluoroscopically guided interventional procedures. We have modified a convolution/superposition-based treatment planning system to compute the dose distribution for kilovoltage beams. We computed lung doses using this system and compared them to those calcu...
Stereotactic body radiation therapy (SBRT) has quickly become a preferred treatment option for early-stage lung cancer patients who are ineligible for surgery. This technique uses tightly conformed megavoltage (MV) x-ray beams to irradiate a tumour with ablative doses in only a few treatment fractions. Small high energy x-ray fields can cause lateral electron disequilibrium (LED) to occur withi...
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