In clinical practice, radiopharmaceutical dynamic imaging technology requires the bolus injection method to complete injection. Due to the failure rate and radiation damage of manual injection, even experienced technicians still bear a lot of psychological burden. This study combined the advantages and disadvantages of various manual injection modes to develop the radiopharmaceutical bolus injector, and explored the application of automatic injection in the field of bolus injection from four aspects: radiation protection, occlusion response, sterility of injection process and effect of bolus injection. Compared with the current mainstream manual injection method, the bolus manufactured by the radiopharmaceutical bolus injector based on the automatic hemostasis method had a narrower full width at half maximum and better repeatability. At the same time, radiopharmaceutical bolus injector had reduced the radiation dose of the technician's palm by 98.8%, and ensured more efficient vein occlusion recognition performance and sterility of the entire injection process. The radiopharmaceutical bolus injector based on automatic hemostasis has application potential in improving the effect and repeatability of bolus injection.
临床中放射性核素动态显像技术要求使用弹丸注射方法完成注射，由于技师手工弹丸注射存在一定的失败率，即便富有经验的技师仍然承担着很大的心理负担。通过总结各种手工注射模式的优劣势，使用开发的放射性核素弹丸注射仪，从辐射防护性、阻塞响应性、注射过程的无菌性及弹丸注射效果四个方面出发，探究自动注射在弹丸注射领域的应用性。相比于当前主流的人工注射方法，基于自动止血法的放射性核素弹丸注射仪所制造的弹丸具有更窄的半峰全宽和更好的重复一致性，同时能够使技师手掌所受的辐射剂量降低98.8%，并保证了更高效的静脉阻塞识别性能和整个注射过程的无菌性。基于自动止血法的放射性核素弹丸注射仪在提高弹丸效果和重复一致性方面具备应用潜力。.
Keywords: Automatic injection device; Bolus injection; Radiopharmaceutical dynamic imaging.