Send to

Choose Destination
See comment in PubMed Commons below
Med Eng Phys. 2009 Apr;31(3):320-7. doi: 10.1016/j.medengphy.2008.04.017. Epub 2008 Jul 30.

Study on gastric interdigestive pressure activity based on phase space reconstruction and FastICA algorithm.

Author information

No. 820 Lab., Department of Instrument, Shanghai Jiaotong University, No. 800 Dongchuan Road, 200240 Shanghai, China.


To investigate the features of the gastric interdigestive pressure activity under normal physiological conditions, we have developed the wireless radiotelemetry capsule based on a telemetry technique. Twelve healthy volunteers participated in this study. Pressure activity data which are an important index of gastric motility can be obtained from the wireless radiotelemetry capsule. But the capsule only records single-dimensional pressure time series which may contain a few interdependent components simultaneously. Automated embedding phase space reconstruction algorithm is employed to reconstruct multi-dimensional phase space. Then the dominant and separated component of the gastric contractions is identified using FastICA algorithm. Finally the use of Hilbert Huang transform method for analyzing the characters of gastric motility is investigated. The results show that the proposed method is an effective approach for the analysis of the gastric pressure series.

[Indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for Elsevier Science
    Loading ...
    Support Center