L. Bradshaw
Last active: 2/19/2015

Profile

We study the magnetic fields generated by the electrical activity of smooth muscle in the stomach and small bowel, and their potential in developing noninvasive methods to diagnose abnormal gastric and intestinal function.

Publications

The following timeline graph is generated from all co-authored publications.

Featured publications are shown below:

  1. Effects of body mass index on gastric slow wave: a magnetogastrographic study. Somarajan S, Cassilly S, Obioha C, Richards WO, Bradshaw LA (2014) Physiol Meas 35(2): 205-15
    › Primary publication · 24398454 (PubMed) · PMC4012612 (PubMed Central)
  2. Theoretical and computational multiple regression study of gastric electrical activity using dipole tracing from magnetic field measurements. Irimia A, Beauchamp JJ, Bradshaw LA (2004) J Biol Phys 30(3): 239-59
    › Primary publication · 23345871 (PubMed) · PMC3456086 (PubMed Central)
  3. Noninvasive biomagnetic detection of isolated ischemic bowel segments. Somarajan S, Cassilly S, Obioha C, Bradshaw LA, Richards WO (2013) IEEE Trans Biomed Eng 60(6): 1677-84
    › Primary publication · 23335661 (PubMed) · PMC3903407 (PubMed Central)
  4. Biomagnetic and bioelectric detection of gastric slow wave activity in normal human subjects--a correlation study. Somarajan S, Muszynski ND, Obioha C, Richards WO, Bradshaw LA (2012) Physiol Meas 33(7): 1171-9
    › Primary publication · 22735166 (PubMed) · PMC3426859 (PubMed Central)
  5. Influence of body parameters on gastric bioelectric and biomagnetic fields in a realistic volume conductor. Kim JH, Pullan AJ, Bradshaw LA, Cheng LK (2012) Physiol Meas 33(4): 545-56
    › Primary publication · 22415019 (PubMed) · PMC3359963 (PubMed Central)
  6. Falling-edge, variable threshold (FEVT) method for the automated detection of gastric slow wave events in high-resolution serosal electrode recordings. Erickson JC, O'Grady G, Du P, Obioha C, Qiao W, Richards WO, Bradshaw LA, Pullan AJ, Cheng LK (2010) Ann Biomed Eng 38(4): 1511-29
    › Primary publication · 20024624 (PubMed) · PMC2855965 (PubMed Central)
  7. Characterization of gastric electrical activity using magnetic field measurements: a simulation study. Kim JH, Bradshaw LA, Pullan AJ, Cheng LK (2010) Ann Biomed Eng 38(1): 177-86
    › Primary publication · 19774463 (PubMed) · PMC2855966 (PubMed Central)
  8. Detection of small bowel slow-wave frequencies from noninvasive biomagnetic measurements. Erickson JC, Obioha C, Goodale A, Bradshaw LA, Richards WO (2009) IEEE Trans Biomed Eng 56(9): 2181-9
    › Primary publication · 19497806 (PubMed) · PMC2760223 (PubMed Central)
  9. Surface current density mapping for identification of gastric slow wave propagation. Bradshaw LA, Cheng LK, Richards WO, Pullan AJ (2009) IEEE Trans Biomed Eng 56(8): 2131-9
    › Primary publication · 19403355 (PubMed) · PMC2722927 (PubMed Central)
  10. Comparison of conventional filtering and independent component analysis for artifact reduction in simultaneous gastric EMG and magnetogastrography from porcines. Irimia A, Richards WO, Bradshaw LA (2009) IEEE Trans Biomed Eng 56(11): 2611-8
    › Primary publication · 19398400 (PubMed) · PMC2855971 (PubMed Central)
  11. Biomagnetic signatures of uncoupled gastric musculature. Bradshaw LA, Irimia A, Sims JA, Richards WO (2009) Neurogastroenterol Motil 21(7): 778-e50
    › Primary publication · 19222760 (PubMed) · PMC2855967 (PubMed Central)
  12. Separation of gastric electrical control activity from simultaneous MGG/EGG recordings using independent component analysis. Irimia A, Gallucci MR, Richards WO, Bradshaw LA (2006) Conf Proc IEEE Eng Med Biol Soc : 3110-3
    › Primary publication · 17946157 (PubMed)
  13. Biomagnetic investigation of injury currents in rabbit intestinal smooth muscle during mesenteric ischemia and reperfusion. O'Mahony GD, Gallucci MR, Córdova-Fraga T, Berch B, Richards WO, Bradshaw LA (2007) Dig Dis Sci 52(1): 292-301
    › Primary publication · 17160467 (PubMed)
  14. Biomagnetic characterization of spatiotemporal parameters of the gastric slow wave. Bradshaw LA, Irimia A, Sims JA, Gallucci MR, Palmer RL, Richards WO (2006) Neurogastroenterol Motil 18(8): 619-31
    › Primary publication · 16918726 (PubMed)
  15. An integrative software package for gastrointestinal biomagnetic data acquisition and analysis using SQUID magnetometers. Irimia A, Cheng LK, Buist ML, Pullan AJ, Bradshaw LA (2006) Comput Methods Programs Biomed 83(2): 83-94
    › Primary publication · 16857291 (PubMed)
  16. Magnetogastrographic detection of gastric electrical response activity in humans. Irimia A, Richards WO, Bradshaw LA (2006) Phys Med Biol 51(5): 1347-60
    › Primary publication · 16481699 (PubMed)
  17. Artifact reduction in magnetogastrography using fast independent component analysis. Irimia A, Bradshaw LA (2005) Physiol Meas 26(6): 1059-73
    › Primary publication · 16311453 (PubMed)
  18. Ellipsoidal electrogastrographic forward modelling. Irimia A, Bradshaw LA (2005) Phys Med Biol 50(18): 4429-44
    › Primary publication · 16148402 (PubMed)
  19. Biomagnetic detection of injury currents in rabbit ischemic intestine. Bradshaw LA, Roy OP, O'Mahony GP, Myers AG, McDowell JG, Wikswo JP, Richards WO (2005) Dig Dis Sci 50(9): 1561-8
    › Primary publication · 16133952 (PubMed)
  20. Vector projection of biomagnetic fields. Bradshaw LA, Myers A, Richards WO, Drake W, Wikswo JP (2005) Med Biol Eng Comput 43(1): 85-93
    › Primary publication · 15742724 (PubMed)
  21. An anatomical model of the gastric system for producing bioelectric and biomagnetic fields. Buist ML, Cheng LK, Yassi R, Bradshaw LA, Richards WO, Pullan AJ (2004) Physiol Meas 25(4): 849-61
    › Primary publication · 15382826 (PubMed)
  22. Theoretical and computational methods for the noninvasive detection of gastric electrical source coupling. Irimia A, Bradshaw LA (2004) Phys Rev E Stat Nonlin Soft Matter Phys 69(5 Pt 1): 051920
    › Primary publication · 15244860 (PubMed)
  23. Theoretical ellipsoidal model of gastric electrical control activity propagation. Irimia A, Bradshaw LA (2003) Phys Rev E Stat Nonlin Soft Matter Phys 68(5 Pt 1): 051905
    › Primary publication · 14682818 (PubMed)
  24. Biomagnetic detection of gastric electrical activity in normal and vagotomized rabbits. Bradshaw LA, Myers AG, Redmond A, Wikswo JP, Richards WO (2003) Neurogastroenterol Motil 15(5): 475-82
    › Primary publication · 14507349 (PubMed)
  25. A spatio-temporal dipole simulation of gastrointestinal magnetic fields. Bradshaw LA, Myers A, Wikswo JP, Richards WO (2003) IEEE Trans Biomed Eng 50(7): 836-47
    › Primary publication · 12848351 (PubMed)
  26. Histopathologic changes during mesenteric ischaemia and reperfusion. Ladipo JK, Seidel SA, Bradshaw LA, Halter S, Wikswo JP, Richards WO (2003) West Afr J Med 22(1): 59-62
    › Primary publication · 12769310 (PubMed)
  27. Changes in intestinal electrical activity during ischaemia correlate to pathology. Ladipo JK, Bradshaw LA, Halter S, Richards WO (2003) West Afr J Med 22(1): 1-4
    › Primary publication · 12769295 (PubMed)
  28. Spatial filter approach for comparison of the forward and inverse problems of electroencephalography and magnetoencephalography. Bradshaw LA, Wijesinghe RS, Wikswo JP (2001) Ann Biomed Eng 29(3): 214-26
    › Primary publication · 11310783 (PubMed)
  29. Spatial filter approach for evaluation of the surface Laplacian of the electroencephalogram and magnetoencephalogram. Bradshaw LA, Wikswo JP (2001) Ann Biomed Eng 29(3): 202-13
    › Primary publication · 11310782 (PubMed)
  30. Volume conductor effects on the spatial resolution of magnetic fields and electric potentials from gastrointestinal electrical activity. Bradshaw LA, Richards WO, Wikswo JP (2001) Med Biol Eng Comput 39(1): 35-43
    › Primary publication · 11214271 (PubMed)
  31. Intestinal tachyarrhythmias during small bowel ischemia. Seidel SA, Hegde SS, Bradshaw LA, Ladipo JK, Richards WO (1999) Am J Physiol 277(5): G993-9
    › Primary publication · 10564105 (PubMed)
  32. Noninvasive detection of ischemic bowel. Seidel SA, Bradshaw LA, Ladipo JK, Wikswo JP, Richards WO (1999) J Vasc Surg 30(2): 309-19
    › Primary publication · 10436451 (PubMed)
  33. The human vector magnetogastrogram and magnetoenterogram. Bradshaw LA, Ladipo JK, Staton DJ, Wikswo JP, Richards WO (1999) IEEE Trans Biomed Eng 46(8): 959-70
    › Primary publication · 10431461 (PubMed)
  34. Effects of mesenteric ischemia and reperfusion on small bowel electrical activity. Hegde SS, Seidel SA, Ladipo JK, Bradshaw LA, Halter S, Richards WO (1998) J Surg Res 74(1): 86-95
    › Primary publication · 9536980 (PubMed)
  35. Correlation and comparison of magnetic and electric detection of small intestinal electrical activity. Bradshaw LA, Allos SH, Wikswo JP, Richards WO (1997) Am J Physiol 272(5 Pt 1): G1159-67
    › Primary publication · 9176226 (PubMed)
  36. Magnetoenterography (MENG): noninvasive measurement of bioelectric activity in human small intestine. Richards WO, Bradshaw LA, Staton DJ, Garrard CL, Liu F, Buchanan S, Wikswo JP (1996) Dig Dis Sci 41(12): 2293-301
    › Primary publication · 9011432 (PubMed)
  37. Superconducting quantum interference device magnetometer for diagnosis of ischemia caused by mesenteric venous thrombosis. Allos SH, Staton DJ, Bradshaw LA, Halter S, Wikswo JP, Richards WO (1997) World J Surg 21(2): 173-7; discussion 177-8
    › Primary publication · 8995074 (PubMed)
  38. Noninvasive diagnosis of mesenteric ischemia using a SQUID magnetometer. Richards WO, Garrard CL, Allos SH, Bradshaw LA, Staton DJ, Wikswo JP (1995) Ann Surg 221(6): 696-704; discussion 704-5
    › Primary publication · 7794074 (PubMed) · PMC1234698 (PubMed Central)