#Mass effect 2 hold the line calculator skin

This may allow for radiation to be even more precisely focused. For this treatment, the radiation machine delivers many small beams of radiation at the tumor from different angles around the body. Helical-tomotherapy a form of IMRT that delivers radiation in a special way. This allows stronger doses to get to certain parts of the tumor and helps lessen damage to nearby normal body tissues. Intensity modulated radiation therapy (IMRT) is like 3D-CRT, but it also changes the strength of some of the beams in certain areas. This allows the radiation oncologist to adjust the position of the patient or re-focus the radiation as needed to be sure that the radiation beams are focused on the tumor exactly and that exposure to normal tissues is limited. Image guided radiation therapy (IGRT) is a form of 3D-CRT where imaging scans (like a CT scan) are done before each treatment. This helps to reduce radiation damage to normal tissues and better kill the cancer by focusing the radiation dose on the tumor's exact shape and size. Three-dimensional conformal radiation therapy (3D-CRT) delivers radiation beams from different directions designed to match the shape of the tumor.

#Mass effect 2 hold the line calculator skin

Electron beams can be given from a linear accelerator or a particle accelerator. The electron beams are invisible and cannot be felt when they are passing through the skin to the cancer. Electrons do not travel very far so they are most often used to treat cancers on the skin or near the surface of the body. The particle beams are invisible and cannot be felt when they are passing through the skin to the cancer.Įlectron beam radiation therapy: Electron beams are also separate units of energy and can act like particle beams or can be converted into photon beam radiation. Particle beams are given by special types of machines called particle accelerators, like a cyclotron or synchrotron. This means that this type of radiation is often able to deliver more radiation to the tumor while reducing its effects on normal tissues in front of and behind the tumor. Particle beam radiation can also travel deep into the body like photon beams but their energy is released at a certain distance. The radiation is released from the machine as a stream of high-energy particles. Particle beam radiation therapy: Particle beams are separate units of energy like a proton or neutron. The photon beams are invisible and cannot be felt when they are passing through the skin to the cancer. Photons are given by a machine called a linear accelerator. Photon beams can travel deep into the body to the tumor but can also damage healthy tissue in front of and behind the tumor. The radiation is released from the machine as a wave of energy. Photon beam radiation therapy: Photon beams are the same type of radiation that is used during an x-ray, like a chest x-ray, but at a much higher amount. Types of beams used in external radiation therapy Your cancer care team will help decide how much radiation is needed to treat your cancer and how often you need to get it. But some people may need to go to the treatment center twice a day for a fewer number of weeks. Usually, they visit the treatment center every weekday (Monday through Friday) for a certain number of weeks. Most people get external radiation therapy over many weeks. The machines focus the radiation beam on the exact location in such a way to maximize the radiation reaching the cancer, but also to limit the effect on normal tissues as little as possible.Įxternal radiation is usually done during outpatient visits to a hospital or treatment center. Radiation technology allows the very careful delivery of external beam radiation therapy. External beam radiation is given most often as photon (x-ray) beams and less often as particle (proton, neutron) or electron beams (see below). A machine is used to aim high-energy rays or particles from outside the body into the tumor. External radiation (or external beam radiation) is the most common type of radiation therapy used for cancer treatment.