Diet for patients in radiotherapy
Isotopes, such as radium-226, cesium-137, iridium-192, and iodine-125, are introduced either temporarily or permanently into body tissues (interstitial radiation therapy) or body cavities (intracavitary radiation therapy). Permanent sources have a short half-life so that the dose received by the patient is limited. So finding a way to make the process more efficient and less taxing on the body would be incredible for anyone living with blood cancer, such as leukaemia. New evidence suggests a change of diet could help blood cancer and transplant patients. Blood stem cells - or haematopoietic stem cells. Megavoltage radiation is more penetrating than lower energy radiation. Another form of internal radiation therapy is the administration of radioactive materials into the bloodstream or a body cavity. If the same thing works in humans, it would mean patients could make a simple change of diet a few weeks before a bone marrow transplant, instead of going through rounds of chemo or radiotherapy to wipe out old blood cells and make room for new, healthy ones. Dictionary Thesaurus Medical Dictionary Legal Dictionary Financial Dictionary Acronyms Idioms Encyclopedia Wikipedia Encyclopedia. Because of improvements in tumor localization, beam direction, planning and prescribing the field to be irradiated, and determining the precise dosage needed, radiation therapy is far more effective and less harmful now than when it was first introduced. The new research focussed on an amino acid called valine, which people get from eating protein. This can involve the implantation of sealed radiation sources in or near cancerous tissue.
Nakauchi and his colleagues expanded on these experiments in the lab with human blood stem cells, and showed that when deprived of valine, they stopped proliferating - a promising sign that the same thing could work in humans. These high voltages are produced by linear accelerators or by cobalt-60 teletherapy units. If it does, it would change the way we treat patients with blood cancer, and could greatly simplify their transplant procedure. Hospital personnel concerned with the care of patients receiving radiation therapy must be aware of the hazards of radiation and the protective policies and procedures established to reduce these hazards. The team found that if they deprived mice of valine via their diet, within two to four weeks, they stopped making new blood stem cells altogether. It produces less damage to the skin at the entry port, is absorbed less in bone, and is scattered less, thus reducing the exposure to tissues outside the x-ray beam. Dictionary, Encyclopedia and Thesaurus - The Free Dictionary. Low-energy x-rays that do not penetrate are used for treatment of superficial skin lesions. The source of radiation may be outside the body of the patient ( external beam irradiation ) or it may be an isotope that has been implanted or instilled into abnormal tissue or a body cavity. Phosphorus-32, a pure beta emitter, is injected intravenously for the treatment of various myeloproliferative diseases, leukemias, and lymphomas. That might sound like a bad thing, but would be incredibly beneficial for patients who are about to get a bone marrow transplant.
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