Problems were studied of three dimensional medical image reconstr-uction from serial cross-sections on microcomputer. First we used obj-ect interpolation to yield binary volme data of the organ studied,thus overcoming the shortcoming of linear gray-scale interpolationand redcing, the preprocessing time,Using improved scan-line coding'for data compression, the volume data was held in the basic memoryof PC, and fast object rotation and manipulation were realized in thelimited memory and porcessing source of t...