Method and apparatus for preparing bone and cartilage transplants for the reconstruction of the acetabulum, femoral head, or both with tissue engineered osteochondral constructs or and osteochondral allograft transplant. A fluidization chamber is provided with a fluidizing medium directed in a first fluidizing direction, e. With its use sectional tissue images produced according to the optical coherence tomography principle can be superimposed with fluorescent images. Said computers use the time limit to determine the executability of computer code.