- Journal Articles -
Somarajan S, Muszynski ND, Hawrami D, Olson JD, Cheng LK, and Bradshaw LA. Detection of Small Bowel Frequencies from Noninvasive Biomagnetic Measurements. Ieee T Bio-Med Eng in press, 2018 [PDF preprint]
Bradshaw LA, Cheng LK, Chung E, Obioha CB, Erickson JC, Gorman BL, Somarajan S, and Richards WO.Diabetic gastroparesis alters the biomagnetic signature of the gastric slow wave. Neurogastroent Motil 28 837-848, 2016. [PDF]
Bradshaw LA, Kim JH, Somarajan S, Richards WO, and Cheng LK. Characterization of Electrophysiological Propagation by Multichannel Sensors. Ieee T Bio-Med Eng 63 1751-1759, 2016. [PDF]
Somarajan S, Muszynski ND, Cheng LK, Bradshaw LA, Naslund TC, and Richards WO. Noninvasive biomagnetic detection of intestinal slow wave dysrhythmias in chronic mesenteric ischemia. Am J Physiol-Gastr L 309 G52-G58, 2015. [PDF]
Somarajan S, Cassilly S, Obioha C, Richards WO, and Bradshaw LA. Effects of body mass index on gastric slow wave: a magnetogastrographic study.Physiol Meas 35 205-215, 2014.[PDF]
Somarajan S, Cassilly S, Obioha C, Bradshaw LA, and Richards WO. Noninvasive Biomagnetic Detection of Isolated Ischemic Bowel Segments. Ieee T Bio-Med Eng 60 1677-1684, 2013. [PDF]
Obioha C, Erickson J, Somarajan S, Richards WO, and Bradshaw LA. Effect of Body Mass Index on the sensitivity of Magnetogastrogram and Electrogastrogram. J of Gastroenterology and Hepatology Research 2 513-519, 2013. [PDF]
Somarajan S, Muszynski ND, Obioha C, Richards WO, and Bradshaw LA. Biomagnetic and bioelectric detection of gastric slow wave activity in normal human subjects-a correlation study. Physiol Meas 33 1171-1179, 2012. [PDF]
Kim JHK, Bradshaw LA, Pullan AJ, and Cheng LK. Characterization of Gastric Electrical Activity Using Magnetic Field Measurements: A Simulation Study. Ann Biomed Eng 38 177-186, 2010. [PDF]
Erickson JC, O'Grady G, Du P, Obioha C, Qiao WL, Richards WO, Bradshaw LA, Pullan AJ, and Cheng LK. Falling-Edge, Variable Threshold (FEVT) Method for the Automated Detection of Gastric Slow Wave Events in High-Resolution Serosal Electrode Recordings.Ann Biomed Eng 38 1511-1529, 2010. [PDF]
Erickson JC, Obioha C, Goodale A, Bradshaw LA, and Richards WO. Detection of Small Bowel Slow-Wave Frequencies From Noninvasive Biomagnetic Measurements. Ieee T Bio-Med Eng 56 2181-2189, 2009. [PDF]
Bradshaw LA, Irimia A, Sims JA, and Richards WO. Biomagnetic signatures of uncoupled gastric musculature. Neurogastroent Motil 21 778-E750, 2009.[PDF]
Bradshaw LA, Cheng LK, Richards WO, and Pullan AJ. Surface Current Density Mapping for Identification of Gastric Slow Wave Propagation. Ieee T Bio-Med Eng 56 2131-2139, 2009. [PDF]
Irimia A, Richards WO, and Bradshaw LA. Comparison of Conventional Filtering and Independent Component Analysis for Artifact Reduction in Simultaneous Gastric EMG and Magnetogastrography From Porcines. Ieee T Bio-Med Eng 56 2611-2618, 2009.[PDF]
Irimia A and Wikswo JP. Gastrointestinal arrhythmias are associated with statistically significant fluctuations in systemic information dimension. Physiol Meas 29 N33-N40, 2008.[PDF]
Irimia A, Richards WO, and Bradshaw LA. Magnetogastrographic detection of gastric electrical response activity in humans. Phys Med Biol 51 1347-1360, 2006.[PDF]
Bradshaw LA, Irimia A, Sims JA, Gallucci MR, Palmer RL, and Richards WO. Biomagnetic characterization of spatiotemporal parameters of the gastric slow wave.Neurogastroent Motil 18 619-631, 2006.[PDF]
Irimia A and Bradshaw LA. Artifact reduction in magnetogastrography using fast independent component analysis Physiol Meas 26 1059-1073, 2005.[PDF]
Bradshaw LA, Roy OP, O'Mahony GP, Myers AG, McDowell JG, Wikswo JP, and Richards WO. Biomagnetic detection of injury currents in rabbit ischemic intestine. Digest Dis Sci 50 1561-1568, 2005 [PDF]
Irimia A and Bradshaw LA. Ellipsoidal electrogastrographic forward modelling. Phys Med Biol 50 4429-4444, 2005.[PDF]
Bradshaw LA, Myers A, Richards WO, Drake W, and Wikswo JP. Vector projection of biomagnetic fields. Med Biol Eng Comput 43 85-93, 2005[PDF]
Buist ML, Cheng LK, Yassi R, Bradshaw LA, Richards WO, and Pullan AJ. An anatomical model of the gastric system for producing bioelectric and biomagnetic fields. Physiol Meas 25 849-861, 2004.[PDF]
Irimia A, Beauchamp JJ, and Bradshaw LA. Theoretical and computational multiple regression study of gastric electrical activity using dipole tracing from magnetic field measurements. J Biol Phys 30 239-259, 2004.[PDF]
Irimia A and Bradshaw LA. Theoretical and computational methods for the noninvasive detection of gastric electrical source coupling. Phys Rev E 69 051920 2004.[PDF]
Ladipo JK, Seidel SA, Bradshaw LA, Halter S, and Wikswo JP. Histopathologic changes during mesenteric ischemia and reperfusion West Afr J Med 22 59-62, 2003. [PDF]
Bradshaw LA, Myers AG, Redmond A, Wikswo JP, and Richards WO. Biomagnetic detection of gastric electrical activity in normal and vagotomized rabbits. Neurogastroent Motil 15 475-482, 2003. [PDF]
Ladipo JK, Bradshaw LA, Halter S, and Richards WO. Changes in intestinal electrical activity during ischemia correlate to pathology West Afr J Med 22 1-4, 2003. [PDF]
Irimia A and Bradshaw LA. Theoretical ellipsoidal model of gastric electrical control activity propagation Phys Rev 68 051905, 2003.[PDF]
Bradshaw LA, Myers A, Wikswo JP, and Richards WO. A spatio-temporal dipole simulation of gastrointestinal magnetic fields. Ieee T Bio-Med Eng 50 836-847, 2003. [PDF]
Bradshaw LA, Richards WO, and Wikswo JP. Volume conductor effects on the spatial resolution of magnetic fields and electric potentials from gastrointestinal electrical activity. Med Biol Eng Comput 39 35-43, 2001. [PDF]
Bradshaw LA, Wijesinghe RS, and Wikswo JP. Spatial filter approach for comparison of the forward and inverse problems of electroencephalography and magnetoencephalography. Ann Biomed Eng 29 214-226, 2001.[PDF]
Bradshaw LA and Wikswo JP. Spatial filter approach for evaluation of the surface Laplacian of the electroencephalogram and magnetoencephalogram Ann Biomed Eng 29 202-213, 2001.[PDF]
Seidel SA, Bradshaw LA, Ladipo JK, Wikswo JP, and Richards WO. Noninvasive detection of ischemic bowel. J Vasc Surg 30 309-319, 1999. [PDF]
Bradshaw LA, Ladipo JK, Staton DJ, Wikswo JP, and Richards WO. The human vector magnetogastrogram and magnetoenterogram. Ieee T Bio-Med Eng 46 959-970, 1999. [PDF]
Seidel SA, Hegde SS, Bradshaw LA, Ladipo JK, and Richards WO. Intestinal tachyarrhythmias during small bowel ischemia Am J Physiol-Gastr L 277 G993-G999, 1999.[PDF]
Hegde SS, Seidel SA, Ladipo JK, Bradshaw LA, Halter S, and Richards WO. Effects of mesenteric ischemia and reperfusion on small bowel electrical activity. J Surg Res 74 86-95, 1998. [PDF]
Allos SH, Staton DJ, Bradshaw LA, Halter S, Wikswo JP, and Richards WO. Superconducting quantum interference device magnetometer for diagnosis of ischemia caused by mesenteric venous thrombosis. World J Surg 21 173-178, 1997.[PDF]
Bradshaw LA, Allos SH, Wikswo JP, and Richards WO. Correlation and comparison of magnetic and electric detection of small intestinal electrical activity. Am J Physiol-Gastr L 272 G1159-G1167, 1997.[PDF]
Richards WO, Bradshaw LA, Staton DJ, Garrard CL, Liu F, Buchanan S, and Wikswo JP. Magnetoenterography (MENG) - Noninvasive measurement of bioelectric activity in human small intestine. Digest Dis Sci 41 2293-2301, 1996.[PDF]
Richards WO, Garrard CL, Allos SH, Bradshaw LA, Staton DJ, and Wikswo JP. Noninvasive Diagnosis of Mesenteric Ischemia Using a Squid Magnetometer. Ann Surg 221 696-705, 1995.[PDF]
- Conference Abstracts (Most Recent) -
Somarajan S, Muszynski ND, Russell A, Gorman B, Acra S, Cheng LK, and Bradshaw LA. High-Density Electrogastrogram Identifies Spatial Dysrhythmias in Adolescent Patients With Chronic Idiopathic Nausea: A Preliminary Study. Gastroenterology Suppl 150 S356-S356, 2016.
Muszynski ND, Paskaranandavadivel N, Togrye CT, Somarajan S, Williams P, Bradshaw LA, and Cheng LK. Spatiotemporal and Morphological Differences in Serosal and Mucosal Electrical Recording of Porcine Colonic Slow Wave. Gastroenterology Suppl 150 S350-S351, 2016.
Somarajan S, Muszynski ND, Richards WO, Cheng LK, and Bradshaw LA. Noninvasive Biomagnetic Assessment of the Effects of Erythromycin on the Gastric Slow Wave. Gastroenterology Suppl 148 S511-S511, 2015.
Muszynski ND, Somarajan S, Richards WO, and Bradshaw LA. Noninvasive Measurement of Gastric Slow Wave Dysrhythmia in Porcine. Gastroenterology Suppl 146 S616-S616, 2014.
Muszynski ND, Somarajan S, Richards WO, and Bradshaw LA. Cholecystokinin Alters Serosal EMG but Not MGG in Porcine Subjects. Gastroenterology Suppl 146 S616-S616, 2014.
Somarajan S, Cassilly S, Obioha CB, Bradshaw LA, and Richards WO. Magnetoenterography for the Detection of Segmental Intestinal Ischemia. Gastroenterology Suppl 144 S734-S734, 2013.
Bradshaw LA and Richards WO. Multichannel Mgg Identifies Intestinal Slow Wave Dysrhythmias in Chronic Meseneteric Ischemia. Gastroenterology Suppl 142 S366-S366, 2012.
Martin CD, Bradshaw LA, Somarajan S, and Richards WO. Progressive Occlusion of Mesenteric Artery Changes Biomagnetic Signature of Intestinal Slow Wave. Gastroenterology Suppl 142 S846-S846, 2012.
Bradshaw LA, Erickson JR, Chung E,and Richards WO. Gastroparesis alters magnetogastrogram propagation patterns. Neurogastroent Motil Suppl 23 7-7, 2011.
Bradshaw LA, Obioha CB, Chung E, Erickson J, and Richards WO. Biomagnetic Signatures of Diabetic Gastroparesis. Gastroenterology Suppl 136 A785-A785, 2009.
Erickson J, Obioha CB, Bradshaw LA, and Richards WO. Detection of Small Bowel Slow Wave Frequencies with Noninvasive Biomagnetic Recording and Semi-Blind Signal Processing. Gastroenterology Suppl 136 A646-A646, 2009.
- 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[PDF]
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)[PDF]
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 1995-2-BradshawCVerlag, 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]
- 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 Verlag GmbH & Co. KGaA
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