National Cancer Institute, Research Contracts Branch, PSCS, 6120 Executive Blvd, Eps/room 638, Bethesda, MD 20892-7227

66 -- AMENDED ELECTRONIC PARAMAGNETIC RESONANCE (EPR) MAGNETIC/GRADIENT COIL SYSTEM SOL RFQ-70150-NV DUE 090897 POC Debbie Moore, Purchasing Agent, 301-402-4509, Trish Haun, Contracting Officer, 301-402-4509 This is an amendment to the combined synopsis/solicitation for an electronic paramagnetic resonance (EPR) magnetic/gradient coil system that was published in the CBD on August 12, 1997. The system is being procured as a commercial item, and a separate written solicitation will not be issued. The August 12 synopsis/solicitation is amended to include the following additional equipment: Since the required EPR system will provide RF pulsed EPR imaging of objects the size of a human head, a magnet/gradient system must be added to house a transmit/receive arm and a resonator coil capable of accommodating an object approximately 20 cm in diameter. The EPR magnet and gradient system that is the subject of this amendment must be compatible with the existing RF electronics in terms of homogeneity and linearity of gradient fields. In addition, long term stability of the magnetic fields is a necessity. The specific requirements of the EPR magnet and gradient system are as follows: Components: Main Magnet power supply and Gradient power supplies. (1) General: (a) Active Volume: Active volume for magnet and gradient coils; Cylinder of 20 cm diameter and 20 cm length. (2) Main Magnet: (a) Type: Electromagnet, water cooled. (b) Magnetic Field Strength: 150 G max. (c) Active Volume: Cylinder of 20 Cm diameter and 20 cm length. (d) Uniformity: less that 20 ppm over the active volume, shim capabilities necessary and system integration. (e) Gradients: static, three axes. (f) Shielding: self shielding, gradient settling time less than ms. (g) Strength: 3 G/cm, linearity better than +/- 5% over active volume, water cooled, to be integrated with main magnet. The original synopsis/solicitation required that all capability statements be received within 20 days after the August 12 publication date. That date is being extended by 6 days, to Sept. 8, 1997 (5:00 PM EST.) as a result of this amendment. See the August 12 notice for other information pertaining to the procurement. All other requirements of the August 12 combined synopsis/solicitation remain in effect. (0238)

Loren Data Corp. http://www.ld.com (SYN# 0294 19970828\66-0008.SOL)