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Digital inspelning av blodtrycksmätning under magnetisk resonanstomografi

Hellberg, Kajsa LU and Mahmutovic, Alen LU (2025) EEML05 20251
Department of Biomedical Engineering
Abstract
Background: Invasive blood pressure (IBP) monitoring during magnetic resonance imaging (MRI) is primarily used in research and intensive care. A monitoring system displays IBP in real time, and there is currently no solution that enables digital recording of this data. The aim of this project was therefore to facilitate clinical research by enabling digital recording of invasive blood pressure.
Methods: The solution was based on hardware, software and validation. An analog pressure signal was extracted via the monitor system’s gating connector and digitized using a data acquisition device (DAQ). The signal was displayed and recorded in LabVIEW with millisecond-level resolution. Validation included
comparison between the digital signal,... (More)
Background: Invasive blood pressure (IBP) monitoring during magnetic resonance imaging (MRI) is primarily used in research and intensive care. A monitoring system displays IBP in real time, and there is currently no solution that enables digital recording of this data. The aim of this project was therefore to facilitate clinical research by enabling digital recording of invasive blood pressure.
Methods: The solution was based on hardware, software and validation. An analog pressure signal was extracted via the monitor system’s gating connector and digitized using a data acquisition device (DAQ). The signal was displayed and recorded in LabVIEW with millisecond-level resolution. Validation included
comparison between the digital signal, the displayed pressure on the monitor, and a reference value derived from a water column. Signal-to-noise ratio (SNR), linear regression, and Bland-Altman analysis were used to evaluate signal quality and agreement.
Results: A linear relationship was observed between the analog signal and the monitor pressure, where 1 mmHg corresponded to 3.8 mV, with a constant voltage offset. The comparison with the water column showed a near 1:1 ratio (1 mmHg to 1.016 mmHg), confirming the system’s accuracy. The SNR was measured to 70
dB.
Conclusion: This method offers a practical tool for researchers aiming to analyze blood pressure data in parallel with MRI, thereby opening up new possibilities for cardiovascular research and clinical insights. (Less)
Please use this url to cite or link to this publication:
author
Hellberg, Kajsa LU and Mahmutovic, Alen LU
supervisor
organization
alternative title
Digital recording of blood pressure measurements during magnetic resonance imaging
course
EEML05 20251
year
type
M2 - Bachelor Degree
subject
language
Swedish
id
9205595
date added to LUP
2025-07-01 09:41:05
date last changed
2025-07-01 09:41:05
@misc{9205595,
  abstract     = {{Background: Invasive blood pressure (IBP) monitoring during magnetic resonance imaging (MRI) is primarily used in research and intensive care. A monitoring system displays IBP in real time, and there is currently no solution that enables digital recording of this data. The aim of this project was therefore to facilitate clinical research by enabling digital recording of invasive blood pressure.
Methods: The solution was based on hardware, software and validation. An analog pressure signal was extracted via the monitor system’s gating connector and digitized using a data acquisition device (DAQ). The signal was displayed and recorded in LabVIEW with millisecond-level resolution. Validation included
comparison between the digital signal, the displayed pressure on the monitor, and a reference value derived from a water column. Signal-to-noise ratio (SNR), linear regression, and Bland-Altman analysis were used to evaluate signal quality and agreement.
Results: A linear relationship was observed between the analog signal and the monitor pressure, where 1 mmHg corresponded to 3.8 mV, with a constant voltage offset. The comparison with the water column showed a near 1:1 ratio (1 mmHg to 1.016 mmHg), confirming the system’s accuracy. The SNR was measured to 70
dB.
Conclusion: This method offers a practical tool for researchers aiming to analyze blood pressure data in parallel with MRI, thereby opening up new possibilities for cardiovascular research and clinical insights.}},
  author       = {{Hellberg, Kajsa and Mahmutovic, Alen}},
  language     = {{swe}},
  note         = {{Student Paper}},
  title        = {{Digital inspelning av blodtrycksmätning under magnetisk resonanstomografi}},
  year         = {{2025}},
}