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Respiratory magnetogram detected with a MEMS device.

Dominguez-Nicolas SM, Juarez-Aguirre R, Herrera-May AL, Garcia-Ramirez P, Figueras E, Gutierrez-D EA, Tapia JA, Trejo A, Manjarrez E - Int J Med Sci (2013)

Bottom Line: Therefore, magnetic signals produced by other organs are also of considerable interest.Here we show first evidence that thoracic muscles can produce a strong magnetic flux density during respiratory activity, that we name respiratory magnetogram.We used a small magnetometer based on microelectromechanical systems (MEMS), which was positioned inside the open thoracic cage of anaesthetized and ventilated rats.

View Article: PubMed Central - PubMed

Affiliation: 1. Research Center for Micro and Nano Technology, Universidad Veracruzana, Calzada Adolfo Ruíz Cortines 455, 94294, Boca del Río, Ver., Mexico.

ABSTRACT
Magnetic fields generated by the brain or the heart are very useful in clinical diagnostics. Therefore, magnetic signals produced by other organs are also of considerable interest. Here we show first evidence that thoracic muscles can produce a strong magnetic flux density during respiratory activity, that we name respiratory magnetogram. We used a small magnetometer based on microelectromechanical systems (MEMS), which was positioned inside the open thoracic cage of anaesthetized and ventilated rats. With this new MEMS sensor of about 20 nT resolution, we recorded a strong and rhythmic respiratory magnetogram of about 600 nT.

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A, Image of a magnetic field sensor based on MEMS technology. B, Image of the signal conditioning system implemented in a PCB for the MEMS sensor.
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Figure 1: A, Image of a magnetic field sensor based on MEMS technology. B, Image of the signal conditioning system implemented in a PCB for the MEMS sensor.

Mentions: Our sensor is a small magnetometer based on MEMS technology developed at the Research Center for Micro and Nanotechnology from the Universidad Veracruzana, Mexico. This research group has publications about this type of MEMS magnetic field sensor 22-24 and some demonstrated applications 21. The sensor exploits the Lorentz force and has an easy fabrication process, a small size and a high sensitivity. Figure 1A shows an image of the main elements of the proposed sensor. It has a compact resonant structure (700×600×5 μm) integrated by an array of silicon beams and uses a piezoresistive sensing system. A signal conditioning system (Figure 1B), together with the sensor, was integrated into a PCB in order to make a digital signal processing, and reduce the electromagnetic noise environment below the signal of interest.


Respiratory magnetogram detected with a MEMS device.

Dominguez-Nicolas SM, Juarez-Aguirre R, Herrera-May AL, Garcia-Ramirez P, Figueras E, Gutierrez-D EA, Tapia JA, Trejo A, Manjarrez E - Int J Med Sci (2013)

A, Image of a magnetic field sensor based on MEMS technology. B, Image of the signal conditioning system implemented in a PCB for the MEMS sensor.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3775099&req=5

Figure 1: A, Image of a magnetic field sensor based on MEMS technology. B, Image of the signal conditioning system implemented in a PCB for the MEMS sensor.
Mentions: Our sensor is a small magnetometer based on MEMS technology developed at the Research Center for Micro and Nanotechnology from the Universidad Veracruzana, Mexico. This research group has publications about this type of MEMS magnetic field sensor 22-24 and some demonstrated applications 21. The sensor exploits the Lorentz force and has an easy fabrication process, a small size and a high sensitivity. Figure 1A shows an image of the main elements of the proposed sensor. It has a compact resonant structure (700×600×5 μm) integrated by an array of silicon beams and uses a piezoresistive sensing system. A signal conditioning system (Figure 1B), together with the sensor, was integrated into a PCB in order to make a digital signal processing, and reduce the electromagnetic noise environment below the signal of interest.

Bottom Line: Therefore, magnetic signals produced by other organs are also of considerable interest.Here we show first evidence that thoracic muscles can produce a strong magnetic flux density during respiratory activity, that we name respiratory magnetogram.We used a small magnetometer based on microelectromechanical systems (MEMS), which was positioned inside the open thoracic cage of anaesthetized and ventilated rats.

View Article: PubMed Central - PubMed

Affiliation: 1. Research Center for Micro and Nano Technology, Universidad Veracruzana, Calzada Adolfo Ruíz Cortines 455, 94294, Boca del Río, Ver., Mexico.

ABSTRACT
Magnetic fields generated by the brain or the heart are very useful in clinical diagnostics. Therefore, magnetic signals produced by other organs are also of considerable interest. Here we show first evidence that thoracic muscles can produce a strong magnetic flux density during respiratory activity, that we name respiratory magnetogram. We used a small magnetometer based on microelectromechanical systems (MEMS), which was positioned inside the open thoracic cage of anaesthetized and ventilated rats. With this new MEMS sensor of about 20 nT resolution, we recorded a strong and rhythmic respiratory magnetogram of about 600 nT.

Show MeSH
Related in: MedlinePlus