There are several ways to give a dose of radiation to a cancerous tumor. The most common method of radiation is to provide the necessary dose unit generates a carrier body outside. In this case, the beam of radiation is 80-100 source of radiation from the body of the person to obtain cm. Sometimes placing the source of radiation within the tumor might have advantages compared to radiation from external supplies. This required to submit to an internal source embedded in the radiation cancer called brachytherapy, the procedure.
If you know the square in physics you should know the purpose of altering the dose of radiation over a large part depends on the distance of the source of radiation, which are known. In brachytherapy, the radiation source inside the tumor volume and the correct positioning of these sources> Radiation within the tumor is of crucial importance.
There are several radioactive isotopes used in brachytherapy. These include radium-226, cesium 137, cobalt-60, iridium192, iodine 125, gold-198 and Palladium-103. Radium has led to some a longer half-life than other radioactive isotopes. In the past, the primary isotope of radium in brachytherapy, but has recently been largely on radio cesium, iridium and gold, which have relatively short half-life and replacedlower energies and radiation of these isotopes can be easily shielded from this earth.
Brachytherapy can be provided with devices known plants. These devices can be in the form of seeds or needles or ribbons. Brachytherapy with permanent or temporary facilities can be provided. These systems may be temporary or permanent. Temporary facilities usually have a longer half-life and higher energies in comparison with permanent installations. All the plants are placed in temporarythe tumor during surgery. The duration of treatment for the temporary plant is usually 1-3 days.
Interstitial low dose rate (LDR) brachytherapy is generally of cancers of the mouth and oral cavity, throat used. This type of treatment is often used in the treatment of sarcomas. The treatment of prostate cancer is the most common form of LDR brachytherapy with seeds. Cervical cancer is the most common application of LDR intracavitary treatment. These patients are often isolated to preventRadiation exposure of nurses and other support personnel during the care of the person.
The most common use of high dose rate (HDR) brachytherapy includes the treatment of esophageal cancer, lung cancer and breast cancer and prostate cancer recently. Most of the HDR treatments are outpatient procedures performed, the patient returned home the same day of treatment. Patients is a treatment for prostate cancer an exception, which can remain in hospital for 2-3 daysduring treatment.
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