The Department of the Interior, Interior Business Center, Acquisition Services Directorate seeks acquisition and installation of an integrated Magnetic Resonance (MR) Linac system for radiation therapy for NCI. The system must include a 1.5 Tesla MR imaging scanner with an integrated digital linear accelerator producing a 7 MV photon beam, a 160-leaf multi-leaf collimator, a fixed reference coordinate system, and an on-line adaptive planning server and treatment planning/review workstation. It must enable precise, concurrent imaging and treatment of cancer patients with images directly mapped to the radiation treatment plan. Questions may be emailed to Timothy Murphy and David Whitby until 16 September 2026 at 3:00 PM EDT. Proposals should be submitted by email to Timothy Murphy and David Whitby.