What is Brachytherapy? For Prostate Cancer

There are several ways of initiating radiation dosage to a cancerous tumor. The many rampant method is to deliver the required dosage from an external beam of radiation programmed outside the body. In some cases the source of radiation beam is located 80-100 cm from the body receiving radiation. Sometimes placing the source of radiation within the duration of the tumor might have advantages in delivering radiation from an external source. This method of delivering required radiation out of an internal source embedded within the tumor is called brachytherapy.

If you are aware of the inverse square law in physics you know the dosage of radiation therapy delivery unrest by a sharp proportion depending upon the distance of the radiation source to the implemented target. In brachytherapy the source of radiation is within the tumor volume and the proper placement of these resources of radiation during the tumor is of crucial importance.

There are several radioactive isotopes used in the brachytherapy. These include radium-226, cesium-137, cobalt-60, iridium192, iodine-125, gold-198 and palladium-103. Radium has a longer half-life compared specifics of the other radioactive isotopes. In the past radium was the primary isotope used in brachytherapy, but just now radium has been traditionally replaced by cesium, gold and iridium, which have relatively shorter half-life and less significant energies and as of this the radiation from these isotopes can be easily shielded.

Brachytherapy can be delivered with devices known as implants. These devices may be in the build of needles or seeds or ribbons. Brachytherapy can be delivered with permanent or temporary implants. These implants ought to be temporary or permanent. Temporary implants largely have a longer half-life and higher energies compared to the permanent implants. All temporary implants are inserted to the tumor during surgery. The duration of care for the temporary implant is usually 1-3 days.

Interstitial low-dose rate (LDR) brachytherapy is usually used for cancers involving the mouth and oral cavity, pharynx. This mode of treatment is often exhausted in the treatment of sarcomas. Prostate cancer treatment is the most common form of LDR brachytherapy using seeds. Uterine cancer is the most common application of intracavitary LDR treatment. These patients are often isolated to prevent radiation exposure to nursing and supplementary supportive staff within the care of the person.

The most common uses of high-dose amount (HDR) brachytherapy includes care of esophageal cancer, lung cancer and recently breast cancer and prostate cancer. Most HDR treatments are done as outpatient procedures permitting the patients to return to real estate the same day as treatment. Patients who are obtaining treatment for prostate cancer is an exception who may remain in the hospital for 2-3 days during the treatment.