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Search Publications by: Kathryn Keenan (Fed)

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Displaying 1 - 25 of 62

Breast imaging with ultra-low field MRI

February 19, 2026
Author(s)
Sheng Shen, Neha Koonjoo, Friderike Longarino, Mansi Saksena, Torben Hornung, Stephen Ogier, Susu Yan, Thomas Bortfeld, Kathryn Keenan, Matthew Rosen

Enhanced Detection of Acute Ischemic Stroke With Low-Field MRI

February 6, 2026
Author(s)
Annabel Sorby-Adams, Nandor Pinter, John Kirsch, Vinay Jaikumar, Olivia Nelson, Stephen Bacchi, Jennifer Guo, John Pitts, Vivien Lee, Keith Muir, Shahid Nimjee, Kathryn Keenan, Matthew Rosen, J. Eugenio Iglesias, Kevin Sheth, Joshua Goldstein, W. Taylor Kimberly

Database of Diffusion MRI Brain Scans at 64 mT and 3 T

January 8, 2026
Author(s)
Andrew Dienstfrey, Zydrunas Gimbutas, Joe Chalfoun, Adele Peskin, Kalina Jordanova, Kathryn Keenan, Stephen Ogier
Low-field magnetic resonance imaging offers the promise to significantly increase access to in vivo soft tissue imaging. The technology is both portable and low-cost in relation to the high-field scanners in clinical use today. However, these gains are

METROLOGY FOR MRI: THE FIELD YOU'VE NEVER HEARD OF

March 19, 2025
Author(s)
Kathryn Keenan, Stephen Russek, Matt Hall
Quantitative MRI has been an active area of research for decades and has produced a huge range of approaches with enormous potential for patient benefit. In many cases, however, there are challenges with reproducibility which has hampered clinical

Color-map recommendation for MR relaxometry maps

October 16, 2024
Author(s)
Miha Fuderer, Fabio Crameri, Nandita deSouza, Bettina Baessler, Vikas Gulani, Meiyun Wang, Ruud de Boer, Matt Cashmore, Wolter de Graaf, Kathryn Keenan, Dan Ma, Carolin Pirkl, Nico Sollmann, Sebastian Weingartner, Stefano Mandija, Xavier Golay

Traceability and Uncertainty in NMR and MRI measurements

January 1, 2024
Author(s)
Stephen Russek, Karl Stupic, Kathryn Keenan
Magnetic resonance imaging (MRI) is increasingly used for quantitative in-vivo measurements, including biomarkers based on relaxation times, diffusion, flow, temperature, local concentration of neurotransmitters and metabolites, tissue conductivity

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
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