A novel Biomagnetic Instrumentation with four Magnetoresistive Sensors to Evaluate Gastric Motility

Paixão, Fabiano Carlos; Moraes, Renata Mendonça; Stelzer, Murilo; Corá, Luciana Aparecida; Américo, Madileine Francely; Andreis, Uilian; Oliveira, Ricardo Brandt de; Baffa, Oswaldo; Miranda, José Ricardo de Arruda

doi:10.1109/iembs.2007.4352764

Cited by 5 publications

(5 citation statements)

References 29 publications

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“…Since then, bio-sensing applications with MR sensors were developed in relevant environments [35-37, 39, 42, 43, 48, 51, 55]. At the 29 th IEEE Engineering in Medicine and Biology Society conference in 2007, an AMR-based biomagnetic prototype was demonstrated to evaluate the gastric activity contractions and in-vivo tests were performed [35,36]. In 2008, a portable bio-sensing prototype was developed and the detection of magnetic nanoparticles was demonstrated [37].…”

Section: A Biomedical Applicationsmentioning

confidence: 99%

Magnetoresistive Sensor Development Roadmap (Non-Recording Applications)

et al. 2019

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Magnetoresistive (MR) sensors have been identified as promising candidates for the development of high-performance magnetometers due to their high sensitivity, low cost, low power consumption, and small size. The rapid advance of MR sensor technology has opened up a variety of MR sensor applications. These applications are in different areas that require MR sensors with different properties. Future MR sensor development in each of these areas requires an overview and a strategic guide. A MR sensor roadmap (non-recording applications) was therefore developed and made public by the Technical Committee of The IEEE Magnetics Society with the aim to provide an R&D guide for MR sensors intended to be used by industry, government, and academia. The roadmap was developed over a three-year period and coordinated by an international effort of 22 taskforce members from 10 countries and 17 organizations, including universities, research institutes, and sensor companies. In this paper, the current status of MR sensors for non-recording

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Section: A Biomedical Applicationsmentioning

confidence: 99%

Magnetoresistive Sensor Development Roadmap (Non-Recording Applications)

et al. 2019

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“…The excitation coils were made with 220 turns, 26-AWG wire, and 55-mm internal diameter. AMR sensors (HMC1001, Honeywell Inc., Morristown, NJ), one-axis sensing, ±2 Gauss field range, and 3.2 mV/V/Gauss sensitivity and set/reset pulse circuit were used [3], [15].…”

Section: B Acbmentioning

confidence: 99%

“…The association between AMR and ACB consists of replacing the ACB detection coils by AMR sensors. The idea was to combine the spatial resolution of the AMR with the convenience of ac excitation [3], [15].…”

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confidence: 99%

Development of an AMR-ACB Array for Gastrointestinal Motility Studies

Paixão

Corá

Américo

et al. 2012

IEEE Trans. Biomed. Eng.

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The association between anisotropic magnetoresistive (AMR) sensor and AC biosusceptometry (ACB) to evaluate gastrointestinal motility is presented. The AMR-ACB system was successfully characterized in a bench-top study, and in vivo results were compared with those obtained by means of simultaneous manometry. Both AMR-ACB and manometry techniques presented high temporal cross correlation between the two periodicals signals . The contraction frequencies using AMR-ACB were 73.9 ± 7.6 mHz and using manometry were 73.8 ± 7.9 mHz during the baseline . The amplitude of contraction using AMR-ACB was 396 ± 108 μT·s and using manometry were 540 ± 198 mmHg·s during the baseline. The amplitudes of signals for AMR-ACB and manometric recordings were similarly increased to 86.4% and 89.3% by neostigmine, and also decreased to 27.2% and 21.4% by hyoscine butylbromide in all animals, respectively. The AMR-ACB array is nonexpensive, portable, and has high-spatiotemporal resolution to provide helpful information about gastrointestinal tract.

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“…The AMRs are more sensitive at low frequency and have a better specific spatial resolution than induction coils. However, up to now the association the AMR with AC magnetic excitation was limited to a small number of sensors and for use in medium size animals [34]. This work presents a novel biomagnetic instrument with thirty six sensors for detection of magnetic fields produced by a MM and MT associated with AC magnetic excitation coils.…”

Section: Introductionmentioning

confidence: 99%

A novel device with 36 channels for imaging and signal acquisition of the gastrointestinal tract based on AC biosusceptometry

Paixão

Quini

Baffa³

et al. 2010

2010 Annual International Conference of the IEEE Engineering in Medicine and Biology

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The alternate current biosusceptometry (ACB) is a biomagnetic technique used to study some physiological parameters associated with gastrointestinal (GI) tract. For this purpose it applies an AC magnetic field and measures the response originating from magnetic marks or tracers. This paper presents an equipment based on the ACB which uses anisotropic magnetoresistive (AMR) sensors and an inexpensive electronic support. The ACB-AMR developed consists of a square array of 6×6 sensors arranged in a first-order gradiometer configuration with one reference sensor. The equipment was applied to capture magnetic images of different phantoms and to acquire gastric contraction activity of healthy rats. The results show a reasonable sensitivity and spatial-temporal resolution, so that it may be applied for imaging of phantoms and signal acquisition of the GI tract of small animals.

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A novel Biomagnetic Instrumentation with four Magnetoresistive Sensors to Evaluate Gastric Motility

Cited by 5 publications

References 29 publications

Magnetoresistive Sensor Development Roadmap (Non-Recording Applications)

Magnetoresistive Sensor Development Roadmap (Non-Recording Applications)

Development of an AMR-ACB Array for Gastrointestinal Motility Studies

A novel device with 36 channels for imaging and signal acquisition of the gastrointestinal tract based on AC biosusceptometry

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