Appreciated your link for "SQUID-based ULF MRI and Superparamagnetic Relaxometry for Early Cancer Diagnostics"
Got me looking and I found this paper, "SQUID Instrumentation for Early Cancer Diagnostics: Combining SQUID-Based Ultra-Low Field MRI and Superparamagnetic Relaxometry", http://www.osti.gov/scitech/servlets/purl/1094826
by those same LANL Applied Modern Physics Group scientists credited in your linked paper. This linked paper was presented at the International Superconducting Electronics Conference, held 7-7-2013 in Cambridge, Mass.
Text within includes, "In this presentation we use the most recent publications from Dr. Edward R. Flynn group". Dr. Flynn's research referenced several places and Senior Scientific, LLC is named twice.
In your article, under Acknowledgment it reads, "The authors also thank Petr Volegov for his data analysis tools that were invaluable in the creation of the algorithms for this work."
This dated 2011 article titled, "Atomic magnetometers used to make ultra-low field MRI", http://www.domain-b.com/technology/Health_Medicine/20111111_magnetometers_2.html is about non-cryogenic anatomical imaging efforts by LANL Applied Modern Physics group. Those named in the work are many of these same authoring scientists, algorithmist Petr Volegov and one of Senior Scientifics recently added researchers, Todor Karaulanov.