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Description

InterSource implants are hollow, hermetically sealed radiotherapeutic sources containing iodine-125 (0.8mm OD x 4.5mm long). InterSource implants can be used with standard implant instruments and needles.

I-125 has a half-life of 59.4 days and decays by electron capture to stable Tellurium-125 with the emission of characteristic x-rays and a low energy (35.5 keV) gamma ray. The electrons and L-x-rays emitted from I-125 are absorbed by the titanium walls of the seed. All the remaining photons produced are in the range of 27.4 to 35.5 keV.

Indications

InterSource implants are indicated for interstitial implantation of select localized tumors with low to moderate radiosensivity. They are used either as primary treatment for tumors such as those of the head, lung, neck, pancreas, prostate and unresectable tumors, or for residual disease after excision of the primary tumor.

InterSource implants are indicated for use concurrent with or at the completion of other treatment modalities, such as external beam radiation therapy.