A system for treating a cancerous state, precancerous, prebenigno or benign prostates by irradiation of the prostate with concentrated energy, the system comprising at least one energy applicator (110, 111) for irradiating the prostate with energy, means for setting the power of the initial energy delivered to said at least one energy applicator, means (410) for monitoring temperatures of walls of the urethra and the adjacent straight to the prostate and means for adjusting the power of relative power supplied to said at least single applicator (110, 111) during treatment based on the monitored temperatures of the urethral and rectal walls, characterized by a) means for monitoring the power supplied to said at least one energy applicator; b) means for automatically completing the treatment when a desired total energy dose has been delivered by said at least one energy applicator to the prostate.
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