Abstract
Standard prostate cancer treatments treat the entire gland because of the known multifocal nature of prostate cancer and the inability to image the discrete tumors with standard imaging. Some have recently proposed focal treatment in which only the dominant tumor is treated. We propose an alternative approach in which the tumor areas are treated with a higher than standard dose of radiotherapy and the remainder of the prostate with a lesser, microscopically adequate, dose. Ultrasound spectrum analysis (USA) is an imaging method which analyzes the spectrum of the radiofrequency signal of an ultrasound to identify the tumor area.
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