1. A method of manufacturing a biopsy grid, the grid adapted to be arranged on a patient's skin to provide positioning information in a medical imaging procedure, the method comprising the steps of: a) combining at least one contrast agent with a hydrogel to form a mixture, the hydrogel providing sufficient tack to stick directly to a frame and the at least one contrast agent visible in the medical imaging procedure, wherein the frame comprises a top and a bottom surface and a central opening; b) coating the mixture onto a carrier sheet in an uncured state; c) curing the mixture; d) cutting hydrogel strips after curing; and e) releasably attaching the hydrogel strips to opposite sides of the frame extending across the central opening of the frame so that, in use, the hydrogel strips can be moved by a medical technician from the frame, when the frame is attached to the patient's skin, so that an area underneath the hydrogel strips may be accessed to provide the positioning information without removing the frame from the patient's skin.