willig@grinnell.edu
Campus Phone: 
641-269-4873
Associate Professor of Physics
On-Campus Address: 
Science 1033
Education / Degrees: 
Postdoc (MRI), 2001-2003, Harvard Medical School/Beth Israel Deaconess Medical Center
Ph.D., Physics, Case Western Reserve University, 2001
M.S., Physics, University of Iowa, 1997
B.A., Grinnell College, 1995
Publications: 
TitleURLSynopsis
Computationally rapid method of estimating signal-to-noise ratio for phased array image reconstructionsWiens C, Kisch S, Willig-Onwuachi J, and McKenzie C. Magnetic Resonance in Medicine 2011; 66: 1192-1197
Studies of the interactions of an MRI system with the shielding in a combined PET/MRI scannerPeng B, Walton J, Cherry S, Willig-Onwuachi J. Physics in Medicine and Biology 2010; 55: 265-280.
Designer RF Field Profiles for Parallel Imaging ApplicationsWillig-Onwuachi J, Eagan TP, Shvartsman ShM, Brown RW. Concepts in Magnetic Resonance Part B: Magnetic Resonance Engineering 2005; 27B: 75-85.
Phase-constrained parallel MR image reconstructionWillig-Onwuachi J, Yeh EN, Grant AK, Ohlinger MA, McKenzie CA, Sodickson DK. Journal of Magnetic Resonance 2005; 176:187-198.
Inherently self-calibrating spiral parallel imagingYeh EN, Stuber M, McKenzie CA, Botnar RM, Ohlinger MA, Grant AK, Willig J, Sodickson DK. Magnetic Resonance in Medicine 2005; 54:1-8.
Toward shielding improvements in MRI gradients and other systems.Brown RW, Cheng Y-CN, Eagan TP, Kidane TK, Mathur H, Petschek RG, Sherwin WG, Shvartsman ShM, Willig JD. Magnetic Resonance Materials in Physics, Biology and Medicine (MAGMA) 2002; 13:186-192.
Supershielding: trapping of magnetic fieldsShvartsman ShM, Brown RW, Eagan TP, Willig JD. IEEE Transactions on Magnetics 2001; 37:3116-3119.
Application of the SUSHI method to the design of gradient coilsShvartsman ShM, Brown RW, Cheng Y-CN, Eagan TP, Fujita H, Morich MA, Petropoulos LS, Willig JD. Magnetic Resonance in Medicine 2001; 45:147-155.
Curriculum Vitae/Resume: 
application/pdf iconCV_JWillig.pdf
Courses Taught: 
Phy-131: General Physics I with Lab
Phy-132: General Physics II with Lab
Phy-335: Electromagnetic Theory
Phy-462: Advanced Laboratory
Tutorial: "The Social Construction of Obama"
Primary Academic Interest: 
Magnetic Resonance Imaging
Other Academic Interests: 
Medical physics
Computational physics and electrodynamics
Inverse problems
Constrained and specialized image reconstruction
MR hardware design and optimization

Selected Research Projects and Students

  • Non-proton NMR/MRI - Fatemeh Elahi '12, Andrew Marcum '12
  • Quantum vs Classical: an exploration of spin coherence - Wenyang Qian '12
  • MRI motion correction using multiple detectors - Paden Roder '10, Illya Tyschenko '11
  • MRI radiofrequency coil characterization, how to measure quality factor - Geoff Jacobs '09, Abel Assefa '08
  • Imaging on a tabletop with Magritek's Terranova earth's field scanner - Yuyang Fan '11
  • Dielectric resonance and wavelength effects - Prabal Adhikari '09

Other Publications

  • Rosenblum D, with Ben-Asher N, Case M, Emens E, Hernandez-Truyol B, Gutierrez V, Ikemoto L, Onwuachi-Willig A, Willig-Onwuachi J, Mutcherson K, Siegelman P, and Jones B. Pregnant Man?: A Conversation. Yale Journal of Law and Feminism 2010; 22: 207-278.
  • Onwuachi-Willig A, Willig-Onwuachi J. A House Divided: Housing Discrimination and the Invisibility of the Multiracial Family. Harvard Civil Rights Civil Liberties Law Review 2009; 44: 231-253.
  • Acknowledging Loving in the Multiracial Family, in LOVING IN A "POST-RACIAL" WORLD: RETHINKING RACE, SEX AND MARRIAGE (Kevin Noble Maillard & Rose Cuison Villazor, eds., forthcoming Cambridge University Press 2011).
  • Onwuachi-Willig A, Willig-Onwuachi J. “Now Each Citizen Can Proclaim ‘I Love You, and We Can Live in Iowa.’” Iowa City Press Citizen. Apr. 4, 2009. (Invited)
  • Onwuachi-Willig A, Willig-Onwuachi J. “Iowa Supreme Court Should Again Be a Pioneer.” Iowa City Press Citizen. Dec. 9, 2008: 9A.