Proportional Technologies, Inc. (PTI) provides reliable, high-performing radiation-related technologies for the homeland security, defense, and clinical research communities. As a pioneer and developer of a cutting-edge, breakthrough Boron-straw neutron detector technology, PTI strives to produce practical detection technologies to meet the demands of today's changing defense and domestic homeland security communities. PTI has since established itself as a leader in the field of neutron detection for security and basic research applications in response to growing concerns over dwindling 3He supplies. Worldwide stockpiles of 3He, a key component in detectors that represent the gold standard for neutron detection, have become nearly depleted in recent decades because of increasing nuclear security and counter-terrorism concerns. In response to the decreasing availability and high cost of 3He detectors, PTI has made significant advances in the development and manufacture of boron-coated straws (BCS) for neutron detection. In clinical research, PTI offers innovative radiopharmaceutical product and imaging detector solutions to advance and support PET imaging research in today's rapidly advancing medical imaging field.