Figure 0-1. (Cover illustration). The innovation of this project, compared to current medical imaging devices, lies in its elimination of two bottlenecks and two "brick walls" in the electronics, allowing a much lower radiation dose to the patient and the extension of the field of view of the detector from about 20 cm to over 150 cm. The result is that the radiation exposure of the patient, as well as the scanning time and the cost per examination are greatly reduced, while the quality of the image is greatly improved. An excerpt of the project can be found in the PREFACE; the scope of the book is described in Section 1.2; the advantages are described in Section 14, Section 1.3, and shown in Figure 14-1 and Figure 1-3. The elimination of the bottleneck on input is described in Section 14.7.1.3; the elimination of the bottleneck on output is described in Section 14.7.2.4. The elimination of the brick wall on the detector boundaries is described in Section 13.3.8, and its implementation is shown in Figure 15-7; and the elimination of the brick wall on the coincidence detection is described in Section 14.7.2, and in Section 13.3.14. Cover illustration composed by Laurie Adams 400 + times improved PET efficiency for lower-dose radiation, lower-cost cancer screening