[en] The past year has seen gratifying results in the performance of PCR-I, the single ring analog coded positron tomograph, and in the development of the design of PCR-II, a cylindrical positron tomograph using two-dimensional analog coding. Analog coding provides high resolution imaging together with high count-rate capability. A computer system capable of handling the enormous amount of data generated by PCR-II is being developed. It will also be used to simulate the performance of the final system during its development. 2 figs