Digital SQUID Array for Portable Low-Field MRI System for Combat Diagnostics

Award Information
Agency: Department of Defense
Branch: Defense Health Program
Contract: N00014-12-M-0103
Agency Tracking Number: O112-H18-3027
Amount: $149,959.00
Phase: Phase I
Program: SBIR
Awards Year: 2012
Solicitation Year: 2011
Solicitation Topic Code: OSD11-H18
Solicitation Number: 2011.2
Small Business Information
175 Clearbrook Road, Elmsford, NY, -
DUNS: 103734869
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Masoud Radparvar
 Vice President of Engineering
 (914) 592-1190
Business Contact
 Steve Damon
Title: Assistant Controller
Phone: (914) 592-1190
Research Institution
Recent research has shown that Superconducting Quantum Interference Devices (SQUIDs) may be used to measure the very weak magnetic signal in Magnetic Resonance Imaging at ultra-low magnetic fields in the milli-tesla range or below. However, the signal-to-noise ratio (SNR) is quite low, requiring very long averaging times to obtain reasonable spatial resolution. The use of large arrays of SQUIDs would be expected to enhance the SNR, but feedback control circuitry and inter-channel crosstalk in conventional analog SQUIDs would make scaling to large arrays difficult to implement in a practical system. Hypres proposes to make use of fully integrated digital SQUID systems, based on Rapid Single Flux Quantum (RSFQ) digital logic, without external feedback loops and crosstalk issues. Furthermore, the digital outputs can be multiplexed in flexible and scalable ways, so that the number of input/output lines may be dramatically reduced. In Phase I, we propose to design, fabricate, and test a digital SQUID array with 4 sensors, and demonstrate how digital multiplexing may be achieved. In Phase II, we will extend these results to an array of at least 128 elements, and demonstrate this in a prototype MRI system.

* Information listed above is at the time of submission. *

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