Gastrointestinal SQUID
Technology Laboratory



PUBLICATIONS

- Journal Articles -

J Erickson, C Obioha, A Goodale, LA Bradshaw, and WO Richards. Detection of Small Bowel Frequencies from Noninvasive Biomagnetic Measurements. IEEE Trans. Biomed. Eng. in press, 2009 [PDF preprint]

LA Bradshaw, LK Cheng, WO Richards, and AJ Pullan. Surface Current Density Mapping for Identification of Gastric Slow Wave Propagation. IEEE Trans. Biomed. Eng. in press, 2009 [PDF preprint]

A. Irimia and J. P. Wikswo, Jr. Gastrointestinal arrhythmias are associated with statistically significant fluctuations in systemic information dimension. Physiol.Meas. 29 (5):N33-N40, 2008

LA Bradshaw, A Irimia, JA Sims, MR Gallucci, RL Palmer, WO Richards 2006 Biomagnetic characterization of spatiotemporal parameters of the gastric slow wave Neurogastroenterology and Motility in press [PDF]

A Irimia, WO Richards, LA Bradshaw 2006 Magnetogastrographic detection of gastric electrical response activity in humans Physics in Medicine and Biology 51 1347-1360 [PDF]

A Irimia, LA Bradshaw 2005 Artifact reduction in magnetogastrography using fast independent component analysis Physiological Measurement 26 1059-1073 [PDF]

A Irimia, LA Bradshaw 2005 Ellipsoidal electrogastrographic forward modelling Physics in Medicine and Biology 50 4429-4444 [PDF]

LA Bradshaw, OP Roy, GP O’Mahony, AG Myers, JG McDowell, JP Wikswo, WO Richards 2005 Biomagnetic detection of injury currents in rabbit ischemic intestine Digestive Diseases and Sciences 50 1561-1568 [PDF]

LA Bradshaw, AG Myers, WO Richards, W Drake, JP Wikswo 2005 Vector projection of biomagnetic fields Medical and Biological Engineering & Computing 43 85-93 [PDF]

A Irimia, JJ Beauchamp, LA Bradshaw 2004 Theoretical and computational multiple regression study of gastric electrical activity using dipole tracing from magnetic field measurements Journal of Biological Physics 30 239-259 [PDF]

ML Buist, LK Cheng, R Yassi, LA Bradshaw, WO Richards, AJ Pullan 2004 An anatomical model of the gastric system for producing bioelectric and biomagnetic fields Physiological Measurement 25 849-861 [PDF]

A Irimia, LA Bradshaw 2004 Theoretical and computational methods for the noninvasive detection of gastric electrical source uncoupling Physical Review E 69 051920 [PDF]

A Irimia, LA Bradshaw 2003 Theoretical ellipsoidal model of gastric electrical control activity propagation Physical Review E 68 051905 [PDF]

JK Ladipo, LA Bradshaw, S Halter, WO Richards 2003 Changes in intestinal electrical activity during ischemia correlate to pathology West Afr J Med 22 1-4 [PDF]

JK Ladipo, SA Seidel, LA Bradshaw, S Halter, JP Wikswo 2003 Histopathologic changes during mesenteric ischemia and reperfusion West Afr J Med 22 59-62 [PDF]

LA Bradshaw, AG Myers, A Redmond, JP Wikswo, WO Richards 2003 Biomagnetic detection of gastric electrical activity in normal and vagotomized rabbits Neurogastroenterology and Motility 15 475-482 [PDF]

LA Bradshaw, AG Myers, JP Wikswo, WO Richards 2003 A spatio-temporal dipole simulation of gastrointestinal magnetic fields IEEE Transactions on Biomedical Engineering 50 836-847 [PDF]

LA Bradshaw, JP Wikswo 2001 Spatial filter approach for evaluation of the surface Laplacian of the electroencephalogram and magnetoencephalogram Annals of Biomedical Engineering 29 202-213 [PDF]

LA Bradshaw, RS Wijesinghe, JP Wikswo 2001 Spatial filter approach for comparison of the forward and inverse problems of electroencephalography and magnetoencephalography Annals of Biomedical Engineering 29 214-226 [PDF]

LA Bradshaw, WO Richards, JP Wikswo 2001 Volume conductor effects on the spatial resolution of magnetic fields and electric potentials from gastrointestinal electrical activity Medical and Biological Engineering & Computing 39 35-43 [PDF]

SA Seidel, SS Hedge, LA Bradshaw, JK Ladipo, WO Richards 1999 Intestinal tachyarrhythmias during small bowel ischemia American Journal of Physiology – Gastrointestinal and Liver Physiology 277 G993-G999 [PDF]

SA Seidel, LA Bradshaw, JK Ladipo, JP Wikswo, WO Richards 1999 Noninvasive detection of ischemic bowel Journal of Vascular Surgery 30 309-319 [PDF]

LA Bradshaw, JK Ladipo, DJ Staton, JP Wikswo, WO Richards 1999 The human vector magnetogastrogram and magnetoenterogram IEEE Transactions on Biomedical Engineering 46 959-970 [PDF]

S Hedge, SA Seidel, JK Ladipo, LA Bradshaw, S Halter, WO Richards 1998 Effects of mesenteric ischemia and reperfusion on small bowel electrical activity Journal of Surgical Research 74 86-95 [PDF]

LA Bradshaw, SH Allos, JP Wikswo, WO Richards 1997 Correlation and comparison of magnetic and electric detection of small intestinal electrical activity American Journal of Physiology – Gastrointestinal and Liver Physiology 272 G1159-G1167 [PDF]

SH Allos, DJ Staton, LA Bradshaw, S Halter, JP Wikswo, WO Richards 1997 Superconducting quantum interference device magnetometer for diagnosis of ischemia caused by mesenteric venous thrombosis World Journal of Surgery 21 173-178 [PDF]

WO Richards, LA Bradshaw, DJ Staton, CL Garrard, F Liu, S Buchanan, JP Wikswo 1996 Magnetoenterography (MENG) – Noninvasive measurement of bioelectric activity in human small intestine Digestive Diseases and Sciences 41 2293-2301 [PDF]

WO Richards, CL Garrard, SH Allos, LA Bradshaw, DJ Staton, JP Wikswo 1995 Noninvasive diagnosis of mesenteric ischemia using a SQUID magnetometer Annals of Surgery 221 696-705 [PDF]

- Book Chapters -

EA Lima, A Irimia, JP Wikswo 2006 The magnetic inverse problem The SQUID Handbook vol. 2: Applications of SQUID Systems (Clarke & Braginski, eds) Wiley-VCH in press

- Conference Articles -

J Erickson, C Obioha, A Goodale, LA Bradshaw, and  WO Richards (2008)  Noninvasive Detection of Small Bowel Electrical Activity from SQUID Magnetometer Measurements using SOBI.  Proc. IEEE-EMBS 2008, Vancouver, B.C., pp 1871-1874

A Goodale, J Erickson, C Obioha, A Irimia,  B Williams, LA Bradshaw, and WO Richards (2008) Partial Mesenteric Ischemia Alters Biomagnetic Slow Wave.  Conference Proceedings: Digestive Diseases Week, San Diego, 2008 (W1289)

T Cordova-Fraga, MR Gallucci, B Berch, LA Bradshaw, WO Richards 2005 Biomagnetic study of ischemia induced in the sigmoidal segment of the intestine: prelimiary results (in Spanish) Proceedings of the 28th Mexican National Congress of Biomedical Engineering 69-72 [PDF]

LA Bradshaw 2004 Biomagnetic techniques for assessing gastric and small bowel electrical activity Medical Physics: Proceedings of the 8th Mexican Symposium on Medical Physics (M Vargas-Luna, G Gutierrez-Juarez, R Huerta-Franco, S Marquez-Gamino, eds) American Institute of Physics [PDF]

A Irimia, LA Bradshaw, JD Fouss 2002 Theoretical models and biomathematical algorithms for identifying multiple gastrointestinal dipoles Proceedings of the IASTED International Conference on Applied Modelling and Simulation November 2002, Cambridge Massachusetts [PDF]

A Irimia 2002 Recursively-applied scanning algorithms for inverse analyses of gastrointestinal biomagnetic fields Proceedings of the IASTED International Conference on Applied Modelling and Simulation November 2002, Cambridge Massachusetts [PDF]

A Irimia 2002 Three-dimensional simulations of gastric biomagnetic dipoles using recursive localization algorithms Proceedings of the IASTED International Conference on Applied Modelling and Simulation November 2002, Cambridge Massachusetts [PDF]

S Scholz, LA Bradshaw, AG Myers, WO Richards 2002 Noninvasive detection of ischemic bowel using a SQUID magnetometer Proceedings of the 2002 German National Surgical Conference [PDF]

AG Myers, LA Bradshaw, JG McDowell, WO Richards 2002 Magnetic vector analysis of gastrointestinal electrical control activity Proceedings of the Second Joint EMBS/BMES Conference, October 23-26 2002, Houston, Texas 1728-1729 [PDF]

LA Bradshaw, JP Wiskwo 1999 Vector or scalar magnetometer arrays? Proceedings of the First Joint BMES/EMBS Conference "Serving Humanity, Advancing Technology" Oct. 13-16 1999, Atlanta, Georgia, USA 888 [PDF]

LK Ladipo, LA Bradshaw, SS Hegde, JP Wikswo, WO Richards 1997 In vivo detection of normal and pathologic bowel electrical activity using a SQUID magnetometer Proceedings of the 19th Annual International Conference of the IEEE Engineering in Medicine and Biology Society [PDF]

WO Richards, LA Bradshaw 1998 Detection of intestinal ischemia using SQUID magnetometers Proceedings of the American Society for Nondestructive Testing Nashville, Tennessee [PDF]

LA Bradshaw, JK Ladipo, JP Wikswo, WO Richards 1997 The vector magnetic field of the human stomach and small bowel Proceedings of the 19th Annual International Confer-ence of the IEEE Engineering in Medicine and Biology Society [PDF]

LA Bradshaw, R Wells, S Paul, WO Richards, JP Wikswo 1997 Noninvasive measurement of gastric propagation using a SQUID magnetometer Proceedings of the 19th International Conference of the IEEE/EMBS Oct. 30-Nov. 2 1997, Chicago, Illinois USA 2392-2393 [PDF]

LA Bradshaw, JP Wikswo 2000 Inverse imaging of distributed oscillatory activity Biomag96: Proceedings of the Tenth International Conference on Biomagnetism ( CJ Aine, Y Okada, G Stroink, SJ Swithenby and CC Wood, eds) Springer-Verlag, New York, 2 923-926 [PDF]

DJ Staton, SH Allos, VK Henry, LA Bradshaw, JK Ladipo, WO Richards, JP Wikswo 1996 Noninvasive measurement of the vector magnetic field from human gastrointestinal sources Biomag96: Proceedings of the Tenth International Conference on Biomagnetism ( CJ Aine, Y Okada, G Stroink, SJ Swithenby and CC Wood, eds) Springer-Verlag, New York, 2 635-637 [PDF]

LA Bradshaw, SH Allos, JP Wikswo, WO Richards 1996 Magnetic field measurement of rabbit colonic electrical activity Biomag96: Proceedings of the Tenth International Conference on Biomagnetism (CJ Aine, Y Okada, G Stroink, SJ Swithenby and CC Wood, eds) Springer-Verlag, New York 2 608-611 [PDF]

O Baffa, M Basile, LA Bradshaw, M Forsman, Y Nakaya, WO Richards 1996 Biomagnetic research in gastroenterology Advances in biomagnetism research (C Aine, Y Okada, G Stroink, S Swithenby and C Wood, eds.) Springer Verlag, New York, New York [PDF]

LA Bradshaw, JP Wikswo 1995 Autoregressive and eigenfrequency spectral analysis of magnetoenterographic signals Proceedings of the 17th Annual International Conference of the IEEE Engineering in Medicine and Biology Society CD ROM [PDF]

LA Bradshaw, CL Garrard, SH Allos, JP Wikswo, WO Richards 1995 Magnetoenterography for detection of intestinal ischemia in rabbits Proceedings of the 17th Annual International Conference of the IEEE Engineering in Medicine and Biology Society CD ROM [PDF]

LA Bradshaw, RS Wijesinghe, JP Wikswo 1994 A spatial filtering forward and inverse model of EEG and MEG Proceedings of the 16th Annual International Conference of the IEEE Engineering in Medicine and Biology Society16 167-168 [PDF]

- Conference Abstracts -

LK Cheng, ML Buist, JA Sims, RL Palmer, LA Bradshaw, WO Richards, AJ Pullan 2004 Spatial localization of gastric electrical activity using noninvasive magnetic field recordings Gastroenterology Suppl 126 A39

AG Myers, JG McDowell, LA Bradshaw, WO Richards 2002 Simultaneous magnetic identification of human gastrointestinal frequency gradients Gastroenterology Suppl122 A325

J McDowell, A Myers, LA Bradshaw, WO Richards 2002 Noninvasive detection of mesenteric ischemia using a superconducting quantum interference device Gastroenterology Suppl 122 A436

OP Roy, AG Myers, JG McDowell, LA Bradshaw, WO Richards 2002 Measurement of DC injury currents using the SQUID magnetometer Gastroenterology Suppl 122 A438

LA Bradshaw, JK Ladipo, WO Richards 1999 Characterization of gastric electrical activity using a SQUID magnetometer Gastroenterology Suppl116 A96

WB Drake, LA Bradshaw, FA Fish, BG Mellen, JP Wikswo 1998 Magnetocardiographic assessment of developmental changes in fetal cardiac intervals Circulation Suppl. S98 835

JK Ladipo, LA Bradshaw, SS Hedge, S Halter, SA Seidel, JP Wikswo, WO Richards 1998 Non-invasive detection of normal and ischemic bowel in vivo using a SQUID Gastroenterology Suppl. S 114 A389

LA Bradshaw, JK Ladipo, CD Haupt, SA Seidel, P van Leeuwen, JP Wikswo, WO Richards 1998 Noninvasive measurement of gastric propagation using a multichannel SQUID magnetometer Gastroenterology Suppl 114 A727

SA Seidel, LA Bradshaw, JK Ladipo, JP Wikswo, WO Richards 1998 Vector magnetogastrography: the gastric slow wave vector Gastroenterology Suppl 114 A836 tachyarrhythmias during small bowel ischemia Gastroenterology Suppl 112 A368

JK Ladipo, SA Seidel, LA Bradshaw, S Halter, WO Richards 1998 Basic electrical rhythm (BER) activity as a measure of bowel viability during mesenteric ischemia and reperfusion Gastroenterology Suppl 114 A1403

SS Hedge, LA Bradshaw, JK Ladipo, JP Wikswo, WO Richards 1997 Intestinal tachyarrhythmias during small bowel ischemia Gastroenterology Suppl 112 A368

LA Bradshaw, JK Ladipo, SS Hedge, S Just, JP Wikswo, WO Richards 1997 The vector magnetic field of the human stomach Gastroenterology Suppl 112 A704

SS Hedge, LA Bradshaw, JK Ladipo, WO Richards 1997 Effects of mesenteric ischemia on small bowel basic electrical rhythm Gastroenterology Suppl 112 A1447

LA Bradshaw, JP Wikswo, WO Richards 1996 The effect of abdominal layers on electric and magnetic fields from gastrointestinal electrical activity: computer simulations Gastroenterology Suppl 110 A 639

LA Bradshaw, SH Allos, JP Wikswo, WO Richards 1996 The effect of abdominal layers on electric and magnetic fields from gastrointestinal electrical activity Gastroenterology Suppl 110 A640

WO Richards, CL Garrard, SH Allos, LA Bradshaw, DJ Staton, JP Wikswo 1994 Nonin-vasive measurement of electrical activity in acutely ischemic small bowel Southern Surgical Society [PDF]

LA Bradshaw, CL Garrard, JP Wikswo, WO Richards 1994 Transabdominal magnetic recording of small-bowel ischemia in anesthetized rabbits Gastroenterology 104 1234

LA Bradshaw, RS Wijesinghe, JP Wikswo 1993 A spatial filtering model for comparison of the forward and inverse problems for the electroencephalogram and the magnetoencephalogram Ninth International Biomagnetism Conference Vienna, AUSTRIA [PDF]

LA Bradshaw, RS Wijesinghe, JP Wikswo 1993 A spatial filtering model for comparison of the forward and inverse problems for EEG and MEG 23rd Annual Meeting of the Society for Neuroscience, Washington, DC [PDF]

- Conference Posters -

A Irimia, WO Richards, LA Bradshaw 2006 Noninvasive recordings of gastric electrical response activity using a SQUID biomagnetometer Digestive Diseases Week 2006 [PDF]

LA Bradshaw, A Irimia, MR Gallucci, WO Richards 2006 Biomagnetic assessment of gastrointestinal physiology and pathophysiology Lipscomb University Presidential Inauguration [PDF]

A Irimia, LA Bradshaw, AJ Pullan, WO Richards, JP Wikswo 2005 Modeling gastrointestinal electrical activity in the Vanderbilt GIST Laboratory Second Annual Retreat of the Vanderbilt Institute of Imaging Science Memphis, Tennessee [PDF]

JA Sims, RL Palmer, LA Bradshaw, WO Richards 2004 Identification of intestinal ischemia using magnetic vector projection analysis Digestive Diseases Week 2004 [PDF]

Disclaimer. These articles are reprinted with permission of the respective publication in which they originally appeared. As a consequence, they may be downloaded for personal use only. Any other use requires the written permission of the original publishing authority.

(c) Gastrointestinal SQUID Technology Laboratory, Vanderbilt University - all rights reserved