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

Abstract:

: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.

journal_name

Med Eng Phys

authors

Huang B,Yan G,Zan P,Li Q

doi

10.1016/j.medengphy.2008.04.017

subject

Has Abstract

pub_date

2009-04-01 00:00:00

pages

320-7

issue

3

eissn

1350-4533

issn

1873-4030

pii

S1350-4533(08)00107-0

journal_volume

31

pub_type

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