RADIATION THERAPY EXAM QUESTIONS AND ANSWERS 100% PASS

RADIATION THERAPY EXAM QUESTIONS AND ANSWERS 100% PASS What is the Goal of Radiation Therapy - Is to sterilize a targeted tumor completely while preserving the integrity of surrounding normal structures. Principles of Radiation Therapy - High-energy ionizing radiation destroys the cancer cell's ability to grow and multiply. Some cells are directly damaged by the ionizing rays or particles. More cells are indirectly affected when the ionizing rays or particles penetrate the cell's nucleus and interact with the water content of the nucleus to form oxygen radicals. Radiosensitivity of Cancer Cells - Radiosensitivity of cells depend on several factors: Type of Cell Phase of the Cell Cycle 2 100% Pass Guarantee Katelyn Whitman, All Rights Division rate of the cell Degree of differentiation Oxygenation Radiation Therapy Limitations - Body tissues have limits to the amount of radiation that can be tolerated. Exceeding those limits can result in serious complications. Emami Article Qualtrex Principles of Radiation Therapy - Radiation dose is determined by: Radiosensitivity of the tumor. Normal tissue tolerance. Volume of tissue to be irradiated. - Radiation generates highly reactive free radical molecules that irreparably alter the cell's DNA structure, thereby rendering the cell incapable of proliferation. 3 100% Pass Guarantee Katelyn Whitman, All Rights Radiation Therapy - Factors which decide the choice of modality to be used: General condition of patient Extent of Disease Histologic nature of tumor What are the treatment types - Types of Treatment Radical - Curative - Definitive Combined modality Prophylaxis Palliative Radical -Curative -Definitive - An attemp