FIELD: medicine.SUBSTANCE: invention refers to medicine and to information and measuring equipment used in medical research and diagnostics. Disclosed is an information-logic measuring decision support system for diagnosing the prostate, comprising an ultrasound investigation subsystem of prostate cancer with ultrasonography sensors and transrectal ultrasound investigation (TRUI) and a software and hardware unit connected to the input of the primary processing subsystem of the visualized information, the information output of which is connected to the secondary processing subsystem, wherein the primary processing subsystem comprises random-access memory (RAM), an image background selection unit, a prostate image image foreknowledge unit, a unit for line differentiation of an image, an adder, a unit for scaling (scanning) of the video frame and a block for clustering of the foreground of the image of the front image of the prostate.EFFECT: invention provides more reliable decision-making by a medical specialist and shorter time for processing information.1 cl, 2 dwg