Radiation therapy (RT) is an essential component in the interdisciplinary treatment of brain tumors. Independently of histology‚ radiation plays a central role and has shown to increase local tumor control. Developments in radiation oncology are always aiming at an increase precision of dose delivery: More conformal coverage of target volumes‚ steep dose gradients to surrounding tissues‚ and sparing of organs at risk (OAR). In photon therapy‚ based on 3D-RT‚ stereotactic radiotherapy was a big step
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Literature The review of related literature in this chapter is composed of principles and discussions of facts about the side effects of radiation therapy to the cancer patients. The chapter begins with a brief history about radiology as a medical science‚ and radiation therapy as a form of medical treatment of diseases. Lastly it enumerates the side effects of radiation therapy and the risks associated with it. Brief History and Definitions of Radiology as a Medical Science In 1895 Roentgen began experiments
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Blackbody radiation is the electro-magnetic radiation emerging from a small hole in a perfectly black box containing electromagnetic radiation at a high temperature. Scientists were interested in setting standards for the electric and thus measured the distribution of the total electromagnetic energy in a black box among the different wavelengths of the light. But not until Max Planck‚ at the turn of the century‚ was a single mathematical formula for the observed distribution of the energy among
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The Effects of Radiation on Cancer There are both negative and positive effects of radiation on cancer. Scientists have discovered that radiation can lessen or increase the chance of obtaining cancer. Radio therapy is a treatment for cancer in which X-rays employ controlled exposure to radiation. Radiation also can save lives. The negative effects on humans are that if over exposed to it‚ it can cause migraines‚ seizures‚ and ultimately‚ death. Firstly‚ external beam radiation therapy used on
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Brachytherapy (also known as internal radiation therapy) is the use of radioactive ‘seeds’ to help destroy cancerous cells. It is commonly used as a treatment for cervical‚ prostate‚ breast and skin cancer. How long the treatment will take will depend on where the tumor is and how large it is. Brachytherapy works from the inside of the body by placing the radioactive ‘seeds’ into the body next to the tumor. About 4/10 people with cancer have some type of radiation therapy as their treatment. History
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Understanding UV radiation The sun sends out different types of radiation – visible light that we see as sunlight‚ infrared radiation felt as heat and UV radiation that we can’t see or feel. Are there different types of radiation in sunlight? Yes. The types of radiation include • visible light‚ which gives us the colours we see‚ • infrared radiation which gives us the warmth we feel‚ and • ultraviolet (UV) radiation. Except in extreme situations‚ neither visible light nor infrared radiation from sunlight
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Is Cell Phone Radiation Really Harmful? With sixty percent of the world’s population using cell phones‚ recent concern has risen from the medical front concerning the harmful effects of cell phone use. All scientific research has concluded that mobile phones do produce RF energy and emit electromagnetic radiation. Studies have also concluded that high levels of RF energy can be harmful to human health. However‚ all scientific studies have not agreed if the levels of RF energy emitted from modern
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The year 2010 was a watershed moment in the field of radiation oncology‚ due to articles written by Walt Bogdanich in the New York Times. These articles critiqued leadership‚ radiation dose‚ and patient safety‚ and accused the community of using unsafe practices (Washington & Leaver‚ 2016). While there had been previous accidents which injured and killed patients during the 1980s‚ those few accidents were attributed to equipment faults‚ as computer equipment was merged with treatment delivery equipment
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Radiation pattern From Wikipedia‚ the free encyclopedia Jump to: navigation‚ search Antenna radiation patterns In the field of antenna design the term ’radiation pattern ’ most commonly refers to the directional (angular) dependence of radiation from the antenna or other source (synonyms: antenna pattern‚ far-field pattern).[1][2][3] Particularly in the fields of fiber optics‚ lasers‚ and integrated optics‚ the term radiation pattern‚ or near-field radiation pattern‚ may also be used as
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claims‚ and studies about the cellphone radiation exposure. Some studies suggest that there is no evidence that cellphone can cause cancer‚ others are saying that there are credible amount of evidence that the use of cell phone cause health complication including cancer. According to the article “Dangers of today technology” Recent research shows that cellular phones can cause health complication‚ including cancer. “Heavy long exposure to cell phone radiation increases risks for certain type of cancer
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