Figure 1From: Transperineal prostate biopsy: analysis of a uniform core sampling pattern that yields data on tumor volume limits in negative biopsiesA. A 3D cutout view of a prostate showing the maximum spherical tumor that can avoid detection in a uniform grid of cores with spacing, S , between core centers. B. The grey quarter-cylinders denote the volume in which a small spherical tumor of diameter D T would be detected.Back to article page