Welcome to Proportional Technologies, Inc.

We welcome straw neutron detector purchase inquiries at This e-mail address is being protected from spambots. You need JavaScript enabled to view it . See  PTI's Standard Terms and Conditions of Sale.

Tumor perfusion imaging with 62Cu-ETS

January 2015 Update New published study demonstrates the feasibility of whole-body (62)Cu-ethylglyoxal bis(thiosemicarbazonato)copper(II) ((62)Cu-ETS) PET/CT tumor perfusion imaging in patients with metastatic renal carcinoma: 

Fletcher JW, Logan TF, Eitel JA, Mathias CJ, Ng Y, et al. Whole-body PET/CT evaluation of tumor perfusion using generator-based 62Cu-ethylglyoxal bis(thiosemicarbazonato)copper(II): validation by direct comparison to 15O-water in metastatic renal cell carcinoma. J Nucl Med, 2015; 56(1):56-62. [Pubmed]

See list of publications under Resources/Publications for more.

Neutron Detection

Proportional Technologies, Inc. (PTI) is introducing a line of neutron detection products based on its patented boron-coated straw (BCS) detector (U.S. Patent 7,002,159). The BCS is a low-cost, reliable technology that converts neutrons in boron (B-10), a material that is high in natural abundance, and has easy, economical isotopic separation methodology.


  • Intrinsically insensitive to gamma radiation; requires no signal processing to reject gammas
  • Achieves >70% intrinsic efficiency, higher than any other technology
  • Very long 30-year lifetime (99%) estimated from rigorous ALT. No scintillators or photomultipliers, known to have lifetime issues
  • Advantages over competing technologies (follow link for an overview)

The BCS is an excellent alternative to 3He-based detectors in large-scale / wide-deployment applications, such as portal monitoring, long-range detection, and portable or handheld devices. The following products are currently available in customized configurations:

Neutron Science
PTI is continuing development of its large-scale, BCS-based detector panels for neutron scattering instruments. Our new design addresses the need for 3He-free, large detector coverage at the Spallation Neutron Source at Oak Ridge National Laboratory, and other neutron science facilities worldwide:

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