Figure 6From: Transperineal prostate biopsy: analysis of a uniform core sampling pattern that yields data on tumor volume limits in negative biopsiesUniform grid for cores spaced S cm apart, with a transverse-plane section approximating an enlarged prostate, shown centered on the midline. Open circles represent initial biopsy cores. Open squares represent repeat biopsy cores. Lines aa' and bb' illustrate the edge effect.Back to article page