Accession number:20100312643935
Title: Using a Kalman filter to compensate for photoplethysmogram artifacts when monitoring CT examinations
Authors: Liu, Shing-Hong (1); Chang, Kang-Ming (2); Yang, Shih- Chung (3)
Author affiliation:(1) Department of Computer Science and
Information Eneering, Chaoyang University of Technology, Taichung, Taiwan; (2) Department of Computer and Communication, Asia University, Taichung, Taiwan; (3) Department of Radiology, Lin-Shin Hospital, Taichung, Taiwan
Corresponding author:Liu, S.-H.
Source title: Proceedings of the 2009 2nd International Conference on Biomedical Engineering and Informatics, BMEI 2009
Abbreviated source title:Proc. Int. Conf. Biomed. Eng. Informatics, BMEI
Monograph title:Proceedings of the 2009 2nd International
Conference on Biomedical Engineering and Informatics, BMEI 2009 Issue date:2009
Publication year:2009 Article number:5305684 Language:English
ISBN-13:9781424441341
Document type:Conference article (CA)
Conference name:2009 2nd International Conference on Biomedical Engineering and Informatics, BMEI 2009
Conference date:October 17, 2009 - October 19, 2009 Conference location:Tianjin, China
Conference code:78840
Sponsor:IEEE Engineering in Medicine and Biology Society
Publisher:IEEE Computer Society, 445 Hoes Lane - P.O.Box 1331, Piscataway, NJ 08855-1331, United States
Abstract:Computed tomography (CT) is a powerful clinical tool for generating clinically useful images. Iodinated contrast medium (ICM) is normally used to enhance the image intensity and tissue contrast, and it can induce a variety of adverse reactions. The goal of this study was to develop a method for monitoring the pathophysiologic condition of the patient during a CT examination. A
photoplethysmography (PPG) waveform was used to detect changes
in the heart rate (HR), which were considered to represent clinical responses to the ICM. To enhance the PPG waveform in the presence of artifacts, a Kalman filter algorithm was used to compensate
artifact signals in order to extracting a more robust beat-to-beat HR.
The study collected data from 82 patients who received a standard CT examination in a hospital. The results showed that patients felt more discomfort when the change in HR lasted for longer or was larger: the response times and HR change were 149±49.5 seconds (mean±SD) and 26±12.6 beats/minute, respectively, in the group that did not experience discomfort, and 123±39.1 seconds (p<0.05) and 19±11.1
beats/minute (p<0.05) in the group that experienced discomfort.
©2009 IEEE.
Number of references:9 Main heading:Kalman filters
Controlled terms: Biomedical engineering - Computerized tomography - Contrast media
Uncontrolled terms: Artifact signals - Clinical response - Clinical tools - Computed Tomography - Heart rates - Image intensities - Iodinated contrast medium - Kalman filter algorithms - Pathophysiologic - Photoplethysmogram - Photoplethysmography - Response time - Wave forms
Classification code:801 Chemistry - 731.1 Control Systems - 723.5 Computer Applications - 716.1 Information Theory and Signal Processing - 803 Chemical Agents and Basic Industrial Chemicals - 703.2 Electric Filters - 461.6 Medicine and Pharmacology - 461.1 Biomedical Engineering - 422.2 Test Methods - 531 Metallurgy and Metallography
DOI:10.1109/BMEI.2009.5305684 Database:Compendex
Compilation and indexing terms, Copyright 2009 Elsevier Inc.
