A method for making a disposable absorbent core comprises depositing absorbent particulate polymer material from a plurality of reservoirs in a printing roll onto a substrate disposed on a grid of a support which includes a plurality of cross bars extending substantially parallel to and spaced from one another so as to form channels extending between the plurality of cross bars. The safety apparatus includes a hollow body having a distal end that will partially envelope the test fixture to catch the test fixture once the test fixture is released from the downhole tool. One of the pile cages is lifted into a pile hole with its end projecting therefrom, and the second pile cage is lifted over the first pile cage and lowered until a part of the cage bars of the second pile cage overlap a part of the cage bars of the first pile cage, and the hole in the support plate lies below the suspension band. The selected copy is sent through a first transmit pipe of the first ring. Ultimately, vessel centerline points are detected using a vessel tracking method, and linked together to form a complete coronary artery tree.