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Transfer Function Analysis of Respiratory and Cardiac Pulsations in Human Brain Observed on Dynamic Magnetic Resonance Images
Joint Authors
Chen, Ting-Yi
Lirng, Jiing-Feng
Kao, Yi-Hsuan
Huang, Chau-Chiun
Liou, Adrain Jy-Kang
Guo, Wan-Yuo
Chou, Chih-Che
Source
Computational and Mathematical Methods in Medicine
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-7, 7 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-04-24
Country of Publication
Egypt
No. of Pages
7
Main Subjects
Abstract EN
Magnetic resonance (MR) imaging provides a noninvasive, in vivo imaging technique for studying respiratory and cardiac pulsations in human brains, because these pulsations can be recorded as flow-related enhancement on dynamic MR images.
By applying independent component analysis to dynamic MR images, respiratory and cardiac pulsations were observed.
Using the signal-time curves of these pulsations as reference functions, the magnitude and phase of the transfer function were calculated on a pixel-by-pixel basis.
The calculated magnitude and phase represented the amplitude change and temporal delay at each pixel as compared with the reference functions.
In the transfer function analysis, near constant phases were found at the respiratory and cardiac frequency bands, indicating the existence of phase delay relative to the reference functions.
In analyzing the dynamic MR images using the transfer function analysis, we found the following: (1) a good delineation of temporal delay of these pulsations can be achieved; (2) respiratory pulsation exists in the ventricular and cortical cerebrospinal fluid; (3) cardiac pulsation exists in the ventricular cerebrospinal fluid and intracranial vessels; and (4) a 180-degree phase delay or inverted amplitude is observed on phase images.
American Psychological Association (APA)
Kao, Yi-Hsuan& Guo, Wan-Yuo& Liou, Adrain Jy-Kang& Chen, Ting-Yi& Huang, Chau-Chiun& Chou, Chih-Che…[et al.]. 2013. Transfer Function Analysis of Respiratory and Cardiac Pulsations in Human Brain Observed on Dynamic Magnetic Resonance Images. Computational and Mathematical Methods in Medicine،Vol. 2013, no. 2013, pp.1-7.
https://search.emarefa.net/detail/BIM-450337
Modern Language Association (MLA)
Kao, Yi-Hsuan…[et al.]. Transfer Function Analysis of Respiratory and Cardiac Pulsations in Human Brain Observed on Dynamic Magnetic Resonance Images. Computational and Mathematical Methods in Medicine No. 2013 (2013), pp.1-7.
https://search.emarefa.net/detail/BIM-450337
American Medical Association (AMA)
Kao, Yi-Hsuan& Guo, Wan-Yuo& Liou, Adrain Jy-Kang& Chen, Ting-Yi& Huang, Chau-Chiun& Chou, Chih-Che…[et al.]. Transfer Function Analysis of Respiratory and Cardiac Pulsations in Human Brain Observed on Dynamic Magnetic Resonance Images. Computational and Mathematical Methods in Medicine. 2013. Vol. 2013, no. 2013, pp.1-7.
https://search.emarefa.net/detail/BIM-450337
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-450337