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Search Publications by: Kathryn Keenan (Fed)

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Displaying 1 - 25 of 47

Low-field MRI: A report on the 2022 ISMRM workshop

June 22, 2023
Author(s)
Adrienne Campbell-Washburn, Katy Keenan, Peng Hu, John Mugler, Krishna Nayak, Andrew Webb, Johnes Obungoloch, Kevin Sheth, Jurgen Hennig, Matthew Rosen, Najat Salameh, Daniel Sodickson, Joel Stein, Jose Marques, Orlando Simonetti

In Vivo Quantitative MRI T1 and T2 Measurements of the Human Brain at 0.064 T

May 20, 2023
Author(s)
Kalina Jordanova, Michele Martin, Stephen Ogier, Megan Poorman, Katy Keenan
Object : Tissue relaxation of the brain is measured in vivo at 0.064 T. This work contributes to research efforts targeted at measuring quantitative magnetic resonance imaging properties of the human body at lower field strengths, thereby increasing the

Relaxation measurements of an MRI system phantom at low magnetic field strengths

May 20, 2023
Author(s)
Michele Martin, Kalina Jordanova, Anthony Kos, Stephen E. Russek, Katy Keenan, Karl Stupic
Abstract Objective Temperature controlled T 1 and T 2 relaxation times are measured on NiCl 2 and MnCl 2 solutions from the ISMRM/NIST system phantom at low magnetic field strengths of 6.5 mT, 64 mT and 550 mT. Materials and methods The T 1 and T 2 were

Magnetic Resonance Imaging Biomarker Calibration Service: NMR Measurement of Isotropic Water Diffusion Coefficient

March 30, 2023
Author(s)
Stephen E. Russek, Katy Keenan, Karl Stupic, Nikki Rentz, Michael Boss, Kevin J. Coakley, Amanda Koepke, Cassandra Stoffer
This document describes a calibration service to measure the water diffusion coefficient, or diffusivity, in reference materials and tissue mimics using nuclear magnetic resonance (NMR) techniques. This calibration is restricted to materials which exhibit

Development and Evaluation of Bluetooth Low-Energy Device for Electronic Encounter Metrics

January 20, 2022
Author(s)
Katy Keenan, Joe Aumentado, Harold Booth, Kimberly Briggman, Mikail Kraft-Molleda, Michele Martin, Rene Peralta, Angela Robinson, Krister Shalm, Michelle Stephens, Emily Townsend, Sae Woo Nam
The coronavirus disease 2019 (COVID-19) pandemic led to the need for tracking of physical contacts and potential exposure to disease. Traditional contact tracing can be augmented by electronic tools called "electronic contact tracing" or "exposure

Workshop Report: Challenges for Digital Proximity Detection in Pandemics: Privacy, Accuracy, and Impact

May 24, 2021
Author(s)
Michelle Stephens, Gregory (Greg) C. Cala, Kristen K. Greene, Katy Keenan, Angela Robinson, Donald Ufford, Zachary Valdez, Lu Shi
NIST held a three-day workshop, "Challenges for Digital Proximity Detection in Pandemics: Privacy, Accuracy, and Impact" Jan. 26th – 28th, 2021. Members of industry, academia, non-profits, state, and federal government were brought together to discuss

A Standard System Phantom for Magnetic Resonance Imaging

April 13, 2021
Author(s)
Maureen Ainslie, Michael A. Boss, Cecil Charles, Laurence Clarke, Jeffrey L. Evelhoch, Paul Finn, Derek L. Hill, Katy Keenan, Guoying Liu, Karl Stupic, Chun Yuan, Michele Martin, Maureen Ainslie, Nikki Rentz
A standard MRI system phantom has been designed and fabricated to assess scanner performance, scanner stability, scanner inter-comparability and accuracy of quantitative relaxation time imaging. The phantom is unique in having SI-traceability, a high level