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Vibro-acoustic spectral analysis of low-field MRI

Arawade Swapnil, Piechowicz Janusz, Pałasz Tadeusz

International Journal of Electronics and Telecommunications

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2025

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Vol. 71, No. 4

1

EN

Magnetic Resonance Imaging (MRI) is modern diagnostic tool to obtain internal images of human body. Vibration and noise are major challenges inherited by the MRI since their development. The paper analyses vibration and sound signals produced from the Low-field MRI system for different scanning sequences. Results from spectral analysis revealed strong relation between the vibration and sound signal, showing scanning sequence specific peaks at multiple frequencies. The results are useful to understand the dynamic nature of vibration and sound signal from MRI to develop the attenuation strategy.

2

Acoustic characterization of the 1.5 Tesla MRI facility in Mobile Imaging Trailer

Arawade Swapnil, Piechowicz Janusz

Vibrations in Physical Systems

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2024

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Vol. 35, nr 2

art. no. 2024219

EN

The Magnetic Resonance (MR) imaging is a very important medical tool for diagnosis of the internal organs of the patient. The major problem associated with MRI is its high noise during operation responsible for anxiety, discomfort and can be harmful for the patient as well as long exposure raises the safety concerns for the operating staffs. This study involves the characterization of the noise in the vicinity of 1.5 Tesla Mobile Imaging Trailer-MRI (MIT-MRI) system, aimed at evaluating the acoustic parameters in the examination room during scanning. The acoustic measurements were carried out using the microphones located inside the MRI examination room for variations of Diffusion Weighted Imaging (DWI) gradient pulse sequences. The sound recordings depicted the waveforms of complex acoustic pulses with high Sound Pressure Level (SPL) spikes of impulse nature. Results revealed equivalent SPL in the MRI examination room exceeds 90 dB(A) and the peak noise was consistently above 101.5 dB(C) and DWI sequence with oscillating gradient (DWI-og) reported peak SPL of 105.9 dB(C). The dominance of the noise is identified in the frequency range of 500-3000 Hz for all scanning sequence. Results indicate that sound levels are high in the mobile scanning facility as compared to the stationary MRI in the hospitals. The noise in the control room and chiller room were also high. Given that these acoustic measurements surpass recommended noise standards, the significance of ear protection is emphasized. These results can be useful in designing the noise reduction strategies to improve the patient comfort and safety.

3

Spectral Analysis of MRI Sound Signal

Arawade Swapnil, Piechowicz Janusz

International Journal of Electronics and Telecommunications

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2024

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Vol. 70, No. 4

839-847

EN

Magnetic Resonance Imaging (MRI) is a very versatile diagnostic tool for non-invasive analysis of human organ functions, without use of ionizing radiations. Loud operating sound is the major challenge associated with the MRI technology, reaching up to 130dB. This paper analyses and compares the spectral properties of acoustic noise produced in the examination room of the mobile imaging trailer based 1.5 Tesla MRI system, during different scanning sequences of image acquisition. The analysis is useful in understanding the dynamic behavior of the sound generated inside the examination room to develop the noise reduction strategy.