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Image-Guided Radiation Therapy Report

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One of the greatest obstacles in the treatment of cancer is targeting the tumor or cancer cells, without causing damage to the surrounding healthy cells. Some cancer cells are so powerful and fast growing, that an aggressive approach is the only way to remove it. Unfortunately, this approach can also lead to destruction of the normal cells, tissues, and organs. Radiation therapy is a treatment that delivers high doses of radiation to a tumor or an area of cancer cells in order to shrink the tumor or eliminate it completely. When cells are exposed to high-energy radiation, the deoxyribonucleic acid (DNA) is targeted and damaged. Once that DNA is damaged beyond repair, the cells either stop dividing, or die off completely. To prevent healthy cells from being targeted, image-guided radiation therapy (IGRT) has been implemented into the treatment plan for some patients. IGRT utilizes positron emission tomography (PET), magnetic resonance imaging (MRI), ultrasound, and computed tomography (CT) to obtain images of the area where the tumor or cancer is located (National Cancer Institute). These images are obtained before every treatment session so that the exact location of the cancer can be identified and targeted. These …show more content…
The goal is that very little or none of the surrounding tissue will be affected because the exact location of the cancer is identified. Another objective is that the dose to the tumor itself can be higher because the focus has been narrowed. A higher radiation dose translates to a higher chance of cancer cell destruction and a possibility of fewer treatment sessions (Mayo Clinic Staff). A few situations where IGRT is especially helpful is when the tumor is situated very close to a sensitive organ or group of tissues, or the tumor is expected to move or change size or shape between sessions. An example of this would be the lungs, heart, or

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