What is Radiotherapy?
There are various methods of radiation therapy, the most commonly used is a linear accelerator to emit a large number of photon (-ray) beams. And neutron beam radiation therapy can be used for certain cancers with narrow tissue edges. Electron beam radiation therapy has penetration Very shallow tissue, suitable for skin or superficial cancers. Proton radiation therapy is limited, but it can provide a sharp ray periphery for brachytherapy fields that require depth and a narrow range. Brachytherapy will be a powerful radiation source. Needles are implanted into the tumor tissue itself (such as the prostate or lungs) to achieve a small range of high-dose effects. Systemic radionuclide therapy can be used for nuclide-adsorbed organ receptors (such as thyroid cancer) or to inhibit whole-body bones. Receptors (such as radioactive strontium for the treatment of metastatic prostate cancer). Curative radiotherapy generally requires the tumor locality or its local area to be included in the irradiation field.
Cancer radiotherapy
- Chinese name
- Cancer radiotherapy
- Content
- Linear Accelerator
- Point
- -ray
- Treatment
- brain tumor
- There are various methods of radiation therapy, the most commonly used is a linear accelerator to emit a large number of photon (-ray) beams. And neutron beam radiation therapy can be used for certain cancers with narrow tissue edges. Electron beam radiation therapy has penetration Very shallow tissue, suitable for skin or superficial cancers. Proton radiation therapy is limited, but it can provide a sharp ray periphery for brachytherapy fields that require depth and a narrow range. Brachytherapy will be a powerful radiation source. Needles are implanted into the tumor tissue itself (such as the prostate or lungs) to achieve a small range of high-dose effects. Systemic radionuclide therapy can be used for nuclide-adsorbed organ receptors (such as thyroid cancer) or to inhibit whole-body bones. Receptors (such as radioactive strontium for the treatment of metastatic prostate cancer). Curative radiotherapy generally requires the tumor locality or its local area to be included in the irradiation field.
- Radiation cell damage is non-selective and non-specific, and has a complex effect on DNA. The effectiveness of treatment depends on how much the cell damage exceeds its ability to repair. Generally speaking, the repair efficiency of normal tissues is higher than that of cancer. Thereby assessing the difference in cell death.
- Radiation therapy can cure many cancers (Table 144-1). Radiation therapy can be combined with surgery (treatment of head and neck, throat, or uterine cancer) or chemotherapy and surgery (treatment of sarcoma or breast, esophagus, lung or rectum, etc.) Cancer). The cure rate of combined therapy exceeds that of traditional monotherapy. Phototherapy is the latest multi-disciplinary physical therapy, which uses a porphyrin derivative (protoporphyrin) to adhere to the tumor for irradiation, making the tumor selective Intake of radiation.
- Even when the hopeless cases are cured, radiation therapy can still provide effective palliative control of cancer. For brain tumors, radiation therapy can prolong the function of patients. For compression tumors of the spinal cord, radiation therapy can eliminate neurological disorders. For superior vena cava syndrome , You can avoid sudden death. Symptomatic or painful metastatic cancer, radiation therapy can often control various symptoms.