当前位置： SCI文献检索 > METHODS OF INFORMATION IN MEDICINE期刊下所有文献 > Time-variant parametric estimation of transient quadratic phase couplings during electroencephalographic burst activity.

Time-variant parametric estimation of transient quadratic phase couplings during electroencephalographic burst activity.

Abstract：

OBJECTIVES:Electroencephalographic burst activity characteristic of burst-suppression pattern (BSP) in sedated patients and of burst-interburst pattern (BIP) in the quiet sleep of healthy neonates have similar linear and non-linear signal properties. Strong interrelations between a slow frequency component and rhythmic, spindle-like activities with higher frequencies have been identified in previous studies. Time-varying characteristics of BSP and BIP prevent a definite patternrelated analysis. A continuous estimation of the bispectrum is essential to analyze these patterns. Parametric bispectral approaches provide this opportunity. METHODS:The adaptation of an AR model leads to a parametric bispectrum by using the transfer function of the estimated AR filter. Time-variant parametric bispectral approaches require an estimation of AR parameters which consider higher order moments to preserve phase information. Accordingly, a time-variant parametric estimation of the bispectrum was introduced. Data driven simulations were performed to provide optimal parameters. BSP (12 patients) and BIP (6 neonates) were analyzed using this novel approach. RESULTS:Significant differences in the time course of burst pattern during BSP and burst-like pattern before the onset of BSP could be shown. A rhythmic quadratic phase coupling (period 10 sec) was identified during BIP in all neonates. CONCLUSION:Quadratic phase couplings during BSP increases in the time course depending on depth of sedation. The visually detected burst activity in BIP is only the temporarily observable EEG correlate of a hidden neural process. Time-variant bispectral approaches offer the possibility of a better characterization of underlying neural processes leading to improved diagnostic tools used in clinical routine.

journal_name

Methods Inf Med

journal_title

Methods of information in medicine

authors

Schwab K,Eiselt M,Schelenz C,Witte H

keywords:

subject

Has Abstract

pub_date

2005-01-01 00:00:00

pages

374-83

issue

3

eissn

0026-1270

issn

2511-705X

pii

05030374

journal_volume

44

pub_type

杂志文章

相关文献

METHODS OF INFORMATION IN MEDICINE文献大全
  • Statistical image reconstruction for inconsistent CT projection data.

    abstract：OBJECTIVES:The filtered backprojection is not able to cope with metal-induced inconsistencies in the Radon space which leads to artifacts in reconstructed CT images. A new algorithm is presented that reduces the drawbacks of existing artifact reduction strategies. METHODS:Inconsistent projection data are bridged by di...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：10.1160/ME9041

    authors： Buzug T,Oehler M

    更新日期：2007-01-01 00:00:00

  • Improving model robustness with bootstrapping -- application to optimal discriminant analysis for ordinal responses (ODAO).

    abstract：OBJECTIVE:Recent results published by Coste et al. in discriminant analysis with ordinal responses showed the superiority of optimal discriminating analysis for ordinal responses (ODAO) both in terms of classification and simplicity of implementation compared to classic methods (Fisher's discrimination, logistic regres...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Le Teuff G,Quantin C,Venot A,Walter E,Coste J

    更新日期：2005-01-01 00:00:00

  • Inter-observer variation in decision-making regarding patients on chronic hemodialysis: a study using the kappa index.

    abstract：:To examine inter-observer variation in the monitoring of patients with chronic disease, four nephrologists independently assessed 62 patients on maintenance hemodialysis. Deviation from normal was determined for adequacy of dialysis, protein intake, and metabolic state. The kappa-index, which allows to adjust for chan...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Timpka T,Buur T

    更新日期：1990-03-01 00:00:00

  • Long-range correlated glucose fluctuations in diabetes.

    abstract：OBJECTIVES:Our objective is to investigate diabetes-related alteration of glucose control in diurnal fluctuations in normal daily life by detrended fluctuation analysis (DFA). METHODS:The fluctuations of glucose of 12 non-diabetic subjects and 15 diabetic patients were measured using a continuous glucose monitoring sy...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Ogata H,Tokuyama K,Nagasaka S,Ando A,Kusaka I,Sato N,Goto A,Ishibashi S,Kiyono K,Struzik ZR,Yamamoto Y

    更新日期：2007-01-01 00:00:00

  • Association between split selection instability and predictive error in survival trees.

    abstract：OBJECTIVES:To evaluate split selection instability in six survival tree algorithms and its relationship with predictive error by means of a bootstrap study. METHODS:We study the following algorithms: logrank statistic with multivariate p-value adjustment without pruning (LR), Kaplan-Meier distance of survival curves (...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Radespiel-Tröger M,Gefeller O,Rabenstein T,Hothorn T

    更新日期：2006-01-01 00:00:00

  • A survey on visual information search behavior and requirements of radiologists.

    abstract：OBJECTIVES:The main objective of this study is to learn more on the image use and search requirements of radiologists. These requirements will then be taken into account to develop a new search system for images and associated meta data search in the Khresmoi project. METHODS:Observations of the radiology workflow, ca...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：10.3414/ME11-02-0025

    authors： Markonis D,Holzer M,Dungs S,Vargas A,Langs G,Kriewel S,Müller H

    更新日期：2012-01-01 00:00:00

  • Medical informatics and bioinformatics: integration or evolution through scientific crises?

    abstract：OBJECTIVES:To contribute a new perspective on recent investigations into the scientific foundations of medical informatics (MI) and bioinformatics (BI). To support efforts that could generate synergies and new research directions. METHODS:MI and BI are compared and contrasted from a philosophy of science perspective. ...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Maojo V,Kulikowski C

    更新日期：2006-01-01 00:00:00

  • MS2/Cardio: towards a multi-service medical software for cardiology.

    abstract：:Many clinics are interested to use software packages in daily practice, but lack of integration of such packages seriously limits their scope. In practice this often entails switching between programs and interrupting the run of an individual program. A multi-task approach would not solve this problem as it would not ...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Pinciroli F,Combi C,Pozzi G,Rossi R

    更新日期：1992-02-01 00:00:00

  • Discussion of "Computational Electrocardiography: Revisiting Holter ECG Monitoring".

    abstract：:This article is part of a For-Discussion-Section of Methods of Information in Medicine about the paper "Computational Electrocardiography: Revisiting Holter ECG Monitoring" written by Thomas M. Deserno and Nikolaus Marx. It is introduced by an editorial. This article contains the combined commentaries invited to indep...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：10.3414/ME15-15-0009

    authors： Baumgartner C,Caiani EG,Dickhaus H,Kulikowski CA,Schiecke K,van Bemmel JH,Witte H

    更新日期：2016-08-05 00:00:00

  • Evaluation of general practice computer templates. Lessons from a pilot randomised controlled trial.

    abstract：:We conducted a pilot randomised trial of computerised templates for the management of asthma and diabetes in general practice in six general practices in North London. Uptake of the guidelines by general practitioners and practice nurses was assessed using qualitative (semi-structured interviews designed to assess the...

    journal_title：Methods of information in medicine

    pub_type： 临床试验,杂志文章,随机对照试验

    doi：

    authors： Tai SS,Nazareth I,Donegan C,Haines A

    更新日期：1999-09-01 00:00:00

  • Data processing at the anesthesia workstation: from data entry to data presentation.

    abstract：:Main requirements for an Anesthesia Information Management System (AIMS) are the supply of additional information for the anesthesiologist at his workstation and complete documentation of the anesthetic procedure. With the implementation of an AIMS (NarkoData) and effective user support, the quality of documentation a...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Benson M,Junger A,Quinzio L,Michel A,Sciuk G,Fuchs C,Marquardt K,Hempelmann G

    更新日期：2000-12-01 00:00:00

  • Cost-effective GPU-grid for genome-wide epistasis calculations.

    abstract：BACKGROUND:Until recently, genotype studies were limited to the investigation of single SNP effects due to the computational burden incurred when studying pairwise interactions of SNPs. However, some genetic effects as simple as coloring (in plants and animals) cannot be ascribed to a single locus but only understood w...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：10.3414/ME11-02-0049

    authors： Pütz B,Kam-Thong T,Karbalai N,Altmann A,Müller-Myhsok B

    更新日期：2013-01-01 00:00:00

  • Read Codes Version 3: a user led terminology.

    abstract：:Version 3 of the Read Codes was designed in response to a new set of requirements generated by three new terming initiatives in the UK, the Clinical Terms Project, the Professions Allied to Medicine Terms Project and the Nursing Terms Project. The challenge was to cope with the detail required by clinical specialists ...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： O'Neil M,Payne C,Read J

    更新日期：1995-03-01 00:00:00

  • An intelligent Computer-Assisted Instruction system for clinical case teaching.

    abstract：:The use of computers in the field of medical education is common. Our purpose is to present a Computer-Assisted Instruction system which has been developed over ten years at the University of Compiègne and the University of Rennes Medical School. This system can be used to help the student to solve clinical cases by a...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Fontaine D,Le Beux P,Riou C,Jacquelinet C

    更新日期：1994-10-01 00:00:00

  • Cortical potential imaging of brain electrical activity by means of parametric projection filter.

    abstract：OBJECTIVES:The objective of this study was to explore suitable spatial filters for inverse estimation of cortical potentials from the scalp electroencephalogram. The effect of incorporating noise covariance into inverse procedures was examined by computer simulations and tested in human experiment. METHODS:The paramet...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Hori J,Lian J,He B

    更新日期：2004-01-01 00:00:00

  • Multi-dimensional visualisation of laboratory findings and functional test results for analysing the clinical course of disease in medicine.

    abstract：:The illustration of a patient's history by a graphical primitive is discussed. Illustration technology is presented which simultaneously represents quantitative examination findings (e.g., laboratory values) and qualitative findings (e.g., from function diagnostics) by a single geometrical figure. Depending on the med...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Goldschmidt AJ,Luz CJ,Giere W,Lüdecke R,Jonas D

    更新日期：1995-06-01 00:00:00

  • Putting biomedical ontologies to work.

    abstract：OBJECTIVES:Biomedical ontologies exist to serve integration of clinical and experimental data, and it is critical to their success that they be put to widespread use in the annotation of data. How, then, can ontologies achieve the sort of user-friendliness, reliability, cost-effectiveness, and breadth of coverage that ...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：10.3414/ME9302

    authors： Smith B,Brochhausen M

    更新日期：2010-01-01 00:00:00

  • Simulation of range imaging-based estimation of respiratory lung motion. Influence of noise, signal dimensionality and sampling patterns.

    abstract：OBJECTIVES:A major problem associated with the irradiation of thoracic and abdominal tumors is respiratory motion. In clinical practice, motion compensation approaches are frequently steered by low-dimensional breathing signals (e.g., spirometry) and patient-specific correspondence models, which are used to estimate th...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：10.3414/ME13-01-0137

    authors： Wilms M,Werner R,Blendowski M,Ortmüller J,Handels H

    更新日期：2014-01-01 00:00:00

  • What do family caregivers of Alzheimer's disease patients desire in smart home technologies? Contrasted results of a wide survey.

    abstract：OBJECTIVES:The authors' aim was to investigate the representations, wishes, and fears of family caregivers (FCs) regarding 14 innovative technologies (IT) for care aiding and burden alleviation, given the severe physical and psychological stress induced by dementia care, and the very slow uptake of these technologies i...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Rialle V,Ollivet C,Guigui C,Hervé C

    更新日期：2008-01-01 00:00:00

  • Adaptable healing patient room for stroke patients. A staff evaluation.

    abstract：INTRODUCTION:This article is part of the focus theme of Methods of Information in Medicine on "Pervasive Intelligent Technologies for Health". BACKGROUND:This paper addresses the evaluation with hospital staff of an in-patient environment that supports patients, family, nursing staff and medical specialists during the...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：10.3414/ME13-02-0032

    authors： Daemen EM,Flinsenberg IC,Van Loenen EJ,Cuppen RP,Rajae-Joordens RJ

    更新日期：2014-01-01 00:00:00

  • Health informatics: handle with caution.

    abstract：:The increased use of computers is a response to the considerable growth in information in all fields of activities. Related to this, in the field of medicine a new component appeared about 40 years ago: Medical Informatics. Its goals are to assist health care professionals in the choice of data to manage and in the ch...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Salamon R,Leroy V,Maurice-Tison S,Le Blanc B

    更新日期：1997-02-01 00:00:00

  • New premises and new tools for medical care and medical education.

    abstract：:Medical care and medical education can be supported more than in the past by using new tools and new premises for the effective linkage between bodies of knowledge and the use of that knowledge. The medical record can be converted from a source-oriented record to a problem-oriented record, enabling to trace not only w...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Weed LL

    更新日期：1989-11-01 00:00:00

  • A three-level graph-based model for the management of hospital information systems.

    abstract：:Information processing in hospitals, especially in university hospitals, is currently faced with two major issues: low-cost hardware and progress in networking technology leads to a further decentralization of computing capacity, due to the increasing need for information processing in hospitals and due to economic re...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Winter A,Haux R

    更新日期：1995-09-01 00:00:00

  • On a hybrid method in dose finding studies.

    abstract：OBJECTIVES:Combination of multiple testing and modeling techniques in dose-response studies. Use of hypotheses tests to assess the significance of the dose-response signal associated with a given candidate dose-response model. Estimation of target dose(s) following the previous model selection step. Illustration of the...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Bretz F,Pinheiro JC,Branson M

    更新日期：2004-01-01 00:00:00

  • Upper-level ontologies for health information systems. Towards an archetype patterns approach.

    abstract：OBJECTIVES:We examine the potential of archetype patterns for upper-level ontology development in health information systems (HISs). METHODS:Archetype patterns, based on the integration of archetype concepts and design patterns, are conceptualized and developed for ontology in the HIS domain. The UML provides the unde...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：10.3414/ME0519

    authors： Raghupathi W,Umar A

    更新日期：2011-01-01 00:00:00

  • Neural network for automatic analysis of motility data.

    abstract：:Continuous recording of intraluminal pressures for extended periods of time is currently regarded as a valuable method for detection of esophageal motor abnormalities. A subsequent automatic analysis of the resulting motility data relies on strict mathematical criteria for recognition of pressure events. Due to great ...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Jakobsen E,Kruse-Andersen S,Kolberg J

    更新日期：1994-03-01 00:00:00

  • Logical ontology for mediating between nursing intervention terminology systems.

    abstract：OBJECTIVES:Several researchers have proposed the use of logical ontologies as 'reference terminologies'. However, there are a number of unresolved issues. This article describes the development of a logical ontology for nursing interventions and presents the results of evaluation. METHODS:Initially this study involved...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Hardiker NR

    更新日期：2003-01-01 00:00:00

  • Development of national competency-based learning objectives "Medical Informatics" for undergraduate medical education.

    abstract：OBJECTIVES:The aim of this project is to develop a catalogue of competency-based learning objectives "Medical Informatics" for undergraduate medical education (abbreviated NKLM-MI in German). METHODS:The development followed a multi-level annotation and consensus process. For each learning objective a reason why a phy...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：10.3414/ME13-04-0001

    authors： Röhrig R,Stausberg J,Dugas M,GMDS project group „Medical Informatics Education in Medicine”.

    更新日期：2013-01-01 00:00:00

  • Evaluation of the impact of a CPOE system on nurse-physician communication--a mixed method study.

    abstract：OBJECTIVES:To assess the impact of a CPOE system on medication-related communication of nurses and physicians. METHODS:In six internal medicine wards of an academic medical center, two questionnaires were used to evaluate nurses' attitudes toward the impact of a paper-based medication system and then a CPOE system on ...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：10.3414/ME0572

    authors： Pirnejad H,Niazkhani Z,van der Sijs H,Berg M,Bal R

    更新日期：2009-01-01 00:00:00

  • On the design of active contours for medical image segmentation. A Scheme for Classification and construction.

    abstract：OBJECTIVES:To provide a comprehensive bottom-up categorization of model-based segmentation techniques that allows to select, implement, and apply well-suited active contour models for segmentation of medical images, where major challenges are the high variability in shape and appearance of objects, noise, artifacts, pa...

    journal_title：Methods of information in medicine

    pub_type： 杂志文章

    doi：

    authors： Lehmann TM,Bredno J,Spitzer K

    更新日期：2003-01-01 00:00:00