Radiofrequency ablation rfa is a type of interstitial hyperthermia that uses radio waves to heat and kill cancer cells in regional hyperthermia various approaches may be used to heat large areas of tissue such as a body cavity organ or limb. In this explanation of brachytherapy and interstitial hyperthermia dr chong describes the differences between low dose and high dose rates of brachytherapy a special iridium 192 treatment unit used in high dose brachytherapy is designed to reduce the impact on surrounding areas like the rectum . Interstitial hyperthermia milligan aj dobelbower rr jr the effectiveness of hyperthermia as a treatment modality for cancer continues to gain popularity in the medical community one of the disappointing findings has been the inability to deliver uniform thermal doses to tumor volumes. Performing interstitial hyperthermia requires the use for the bsd 500 built in treatment planning program using this software the size and shape of the tumor can be traced on a grid on the computers screen treatment plans can ten be made by simulating the placement of antennae in and around the tumor. Local hyperthermia confines the treatment to a small area such as a tumor approaches to local hyperthermia include external approach which is used to treat tumors that are near the body surface in which external applicators are placed to raise the temperature of the tumor interstitial approach used to treat tumors deep within the body eg brain tumors where probes or needles are
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