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The results of 526 transrectal prostatic biopsies are available. Mean age of the patients was 64.6 years, mean level of PSA--10.4 ng/ml, mean size of the prostate--56 cm3. Biopsy was made in visualization of the prostate in the sagittal projection (ultrasound devices BruelKjaer 1846 and Kretz Voluson 730). Application of BruelKjaer Medical 2102 Hawk provides visualization of the prostate during biopsy both in sagittal and cross projection. Double visualization significantly improved detectability of prostatic cancer in patients with PSA 4-10 ng/ml. In biopsy of the top and peripheral zone there was lengthening of prostatic tissue fragments, reduced fragmentation of the columns, less frequent blank shots of the biopsy gun. The data obtained supports the importance of isolated placement and marking of prostatic tissue fragments in biopsy and allow to recommend wide clinical use of ultrasonic facilities with biplanic sensors providing online sagittal and cross visualization of the prostate.

Three-dimentional (3D) ultrasound investigation (USI) covered 60 patients with various prostatic diseases. 3D USI was made with a computer tomographic device "Echotom-3D" allowing getting three-dimentinal images on two-dimentional scanners as well as 1846 scanner ("BK Ultrasound Systems", Denmark), sensors 3.5, 5.0 and 7.0 MHz. Transabdominal, perineal and transrectal 3D USI were performed. These proved highly effective in diagnosis of prostatic diseases.