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Accelerometer-Based Method for Extracting Respiratory and Cardiac Gating Information for Dual Gating during Nuclear Medicine Imaging.

Jafari Tadi M, Koivisto T, Pänkäälä M, Paasio A - Int J Biomed Imaging (2014)

Bottom Line: Both respiratory and cardiac motions reduce the quality and consistency of medical imaging specifically in nuclear medicine imaging.The correct information about the status of ventricles and atria helps us to create an improved estimate for quiescent phases within a cardiac cycle.The correlation of ADR signals with the reference respiration belt was investigated using Pearson correlation.

View Article: PubMed Central - PubMed

Affiliation: Technology Research Center, Brahea Center, University of Turku, 20520 Turku, Finland ; Department of Clinical Physiology and Nuclear Medicine, Faculty of Medicine, University of Turku, 20520 Turku, Finland.

ABSTRACT
Both respiratory and cardiac motions reduce the quality and consistency of medical imaging specifically in nuclear medicine imaging. Motion artifacts can be eliminated by gating the image acquisition based on the respiratory phase and cardiac contractions throughout the medical imaging procedure. Electrocardiography (ECG), 3-axis accelerometer, and respiration belt data were processed and analyzed from ten healthy volunteers. Seismocardiography (SCG) is a noninvasive accelerometer-based method that measures accelerations caused by respiration and myocardial movements. This study was conducted to investigate the feasibility of the accelerometer-based method in dual gating technique. The SCG provides accelerometer-derived respiratory (ADR) data and accurate information about quiescent phases within the cardiac cycle. The correct information about the status of ventricles and atria helps us to create an improved estimate for quiescent phases within a cardiac cycle. The correlation of ADR signals with the reference respiration belt was investigated using Pearson correlation. High linear correlation was observed between accelerometer-based measurement and reference measurement methods (ECG and Respiration belt). Above all, due to the simplicity of the proposed method, the technique has high potential to be applied in dual gating in clinical cardiac positron emission tomography (PET) to obtain motion-free images in the future.

No MeSH data available.


Related in: MedlinePlus

Bland-Altman plots of accelerometer-based measurements. (a) High agreement between SCG and ECG cardiac cycle duration. ((b), (c), and (d)) Good agreement of the respiratory cycle duration across normal, slow-paced, and fast-paced breathing, respectively.
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fig9: Bland-Altman plots of accelerometer-based measurements. (a) High agreement between SCG and ECG cardiac cycle duration. ((b), (c), and (d)) Good agreement of the respiratory cycle duration across normal, slow-paced, and fast-paced breathing, respectively.

Mentions: Figure 9(a) indicates the agreement between the SCG and ECG across 10 subjects. The Bland Altman diagram for the cardiac cycle durations obtained from SCG signals, relative to ECG, is shown in Figure 9(a). The bias value is −0.24 (95% confidence levels: upper 8.2, lower −8.2) for SCG. On this basis, the agreement between the accelerometer-based method and electrocardiography was found very high.


Accelerometer-Based Method for Extracting Respiratory and Cardiac Gating Information for Dual Gating during Nuclear Medicine Imaging.

Jafari Tadi M, Koivisto T, Pänkäälä M, Paasio A - Int J Biomed Imaging (2014)

Bland-Altman plots of accelerometer-based measurements. (a) High agreement between SCG and ECG cardiac cycle duration. ((b), (c), and (d)) Good agreement of the respiratory cycle duration across normal, slow-paced, and fast-paced breathing, respectively.
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4120481&req=5

fig9: Bland-Altman plots of accelerometer-based measurements. (a) High agreement between SCG and ECG cardiac cycle duration. ((b), (c), and (d)) Good agreement of the respiratory cycle duration across normal, slow-paced, and fast-paced breathing, respectively.
Mentions: Figure 9(a) indicates the agreement between the SCG and ECG across 10 subjects. The Bland Altman diagram for the cardiac cycle durations obtained from SCG signals, relative to ECG, is shown in Figure 9(a). The bias value is −0.24 (95% confidence levels: upper 8.2, lower −8.2) for SCG. On this basis, the agreement between the accelerometer-based method and electrocardiography was found very high.

Bottom Line: Both respiratory and cardiac motions reduce the quality and consistency of medical imaging specifically in nuclear medicine imaging.The correct information about the status of ventricles and atria helps us to create an improved estimate for quiescent phases within a cardiac cycle.The correlation of ADR signals with the reference respiration belt was investigated using Pearson correlation.

View Article: PubMed Central - PubMed

Affiliation: Technology Research Center, Brahea Center, University of Turku, 20520 Turku, Finland ; Department of Clinical Physiology and Nuclear Medicine, Faculty of Medicine, University of Turku, 20520 Turku, Finland.

ABSTRACT
Both respiratory and cardiac motions reduce the quality and consistency of medical imaging specifically in nuclear medicine imaging. Motion artifacts can be eliminated by gating the image acquisition based on the respiratory phase and cardiac contractions throughout the medical imaging procedure. Electrocardiography (ECG), 3-axis accelerometer, and respiration belt data were processed and analyzed from ten healthy volunteers. Seismocardiography (SCG) is a noninvasive accelerometer-based method that measures accelerations caused by respiration and myocardial movements. This study was conducted to investigate the feasibility of the accelerometer-based method in dual gating technique. The SCG provides accelerometer-derived respiratory (ADR) data and accurate information about quiescent phases within the cardiac cycle. The correct information about the status of ventricles and atria helps us to create an improved estimate for quiescent phases within a cardiac cycle. The correlation of ADR signals with the reference respiration belt was investigated using Pearson correlation. High linear correlation was observed between accelerometer-based measurement and reference measurement methods (ECG and Respiration belt). Above all, due to the simplicity of the proposed method, the technique has high potential to be applied in dual gating in clinical cardiac positron emission tomography (PET) to obtain motion-free images in the future.

No MeSH data available.


Related in: MedlinePlus