Damper design for improving S/N ratio of the seismocardiogram monitoring in the openMRI-guided operating theater

K. Naemura, Hiroshi Iseki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The final goal of this study is to establish a method of measuring precisely the seismocardiogram (SCG) of a patient who lying in an open magnetic resonance imaging (openMRI) machine for myocardial ischemia monitoring during surgery. Vibration isolation from the gantry vibration during MRI scan is essential for clinical use. Authors previously reported the comparison between the SCG and the gantry vibration. A damper to decrease vibration below 30 Hz should be designed. In this paper, authors fabricated a damper model to check the feasibility of the damping effect, and compared with the patient bed mat. Experiment using a vibrator showed 1) the viscosity damping coefficient of the current damper was 2 kN s/m, 2) owing to the damper, peak ratio between input and output amplitude decreased from 2.5 to 1.2, and 3) natural frequency decreased from 12 Hz to S Hz. Damping below 30 Hz was successfully achieved. The maximum S/N ratio was calculated 6, improving from 1.8. Simulation showed that the maximum S/N would be 75 under the viscosity damping coefficient of 1 N s/m.

Original languageEnglish
Title of host publicationAnnual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings
Pages3428-3431
Number of pages4
Volume26 V
Publication statusPublished - 2004
Externally publishedYes
EventConference Proceedings - 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2004 - San Francisco, CA, United States
Duration: 2004 Sep 12004 Sep 5

Other

OtherConference Proceedings - 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2004
CountryUnited States
CitySan Francisco, CA
Period04/9/104/9/5

Fingerprint

Theaters
Magnetic resonance
Damping
Imaging techniques
Monitoring
Viscosity
Vibrators
Surgery
Natural frequencies
Experiments

Keywords

  • Damper
  • OpenMRI
  • Seismocardiogram
  • Vibration isolation

ASJC Scopus subject areas

  • Bioengineering

Cite this

Naemura, K., & Iseki, H. (2004). Damper design for improving S/N ratio of the seismocardiogram monitoring in the openMRI-guided operating theater. In Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings (Vol. 26 V, pp. 3428-3431)

Damper design for improving S/N ratio of the seismocardiogram monitoring in the openMRI-guided operating theater. / Naemura, K.; Iseki, Hiroshi.

Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings. Vol. 26 V 2004. p. 3428-3431.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Naemura, K & Iseki, H 2004, Damper design for improving S/N ratio of the seismocardiogram monitoring in the openMRI-guided operating theater. in Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings. vol. 26 V, pp. 3428-3431, Conference Proceedings - 26th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, EMBC 2004, San Francisco, CA, United States, 04/9/1.
Naemura K, Iseki H. Damper design for improving S/N ratio of the seismocardiogram monitoring in the openMRI-guided operating theater. In Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings. Vol. 26 V. 2004. p. 3428-3431
Naemura, K. ; Iseki, Hiroshi. / Damper design for improving S/N ratio of the seismocardiogram monitoring in the openMRI-guided operating theater. Annual International Conference of the IEEE Engineering in Medicine and Biology - Proceedings. Vol. 26 V 2004. pp. 3428-3431
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