A Comparison of Alternative Approaches to MR Cardiac Triggering: A Pilot Study at 3 Tesla

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Authors

BRABLIK J. LADROVA Martina VILIMEK Dominik KOLARIK Jakub KAHANKOVA Radana HANZLIKOVA Pavla NEDOMA Jan BEHBEHANI Khosrow FAJKUS Marcel VOJTÍŠEK Lubomír MARTINEK Radek

Year of publication 2022
Type Article in Periodical
Magazine / Source IEEE JOURNAL OF BIOMEDICAL AND HEALTH INFORMATICS
MU Faculty or unit

Central European Institute of Technology

Citation
Web https://ieeexplore.ieee.org/document/9695180
Doi http://dx.doi.org/10.1109/JBHI.2022.3146707
Keywords Electrocardiography; Heart; Synchronization; Magnetohydrodynamics; Magnetic resonance imaging; Image quality; Skin; Alternative sensors; ballistocardiography; fiber-optic sensor; magnetic resonance cardiac triggering; pneumatic sensor
Description This pilot comparative study evaluates the usability of the alternative approaches to magnetic resonance (MR) cardiac triggering based on ballistocardiography (BCG): fiber-optic sensor (O-BCG) and pneumatic sensor (P-BCG). The comparison includes both the objective and subjective assessment of the proposed sensors in comparison with a gold standard of ECG-based triggering. The objective evaluation included several image quality assessment (IQA) parameters, whereas the subjective analysis was performed by 10 experts rating the diagnostic quality (scale 1 - 3, 1 corresponding to the best image quality and 3 the worst one). Moreover, for each examination, we provided the examination time and comfort rating (scale 1 - 3). The study was performed on 10 healthy subjects. All data were acquired on a 3 T SIEMENS MAGNETOM Prisma. In image quality analysis, all approaches reached comparable results, with ECG slightly outperforming the BCG-based methods, especially according to the objective metrics. The subjective evaluation proved the best quality of ECG (average score of 1.68) and higher performance of P-BCG (1.97) than O-BCG (2.03). In terms of the comfort rating and total examination time, the ECG method achieved the worst results, i.e. the highest score and the longest examination time: 2.6 and 10:49 s, respectively. The BCG-based alternatives achieved comparable results (P-BCG 1.5 and 8:06 s; OBCG 1.9, 9:08 s). This study confirmed that the proposed BCG-based alternative approaches to MR cardiac triggering offer comparable quality of resulting images with the benefits of reduced examination time and increased patient comfort.
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