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 the sought internal motion given a signal measurement. Recently, the use of multidimensional signals derived from range images of the moving skin surface has been proposed to better account for complex motion patterns. In this work, a simulation study is carried out to investigate the motion estimation accuracy of such multidimensional signals and the influence of noise, the signal dimensionality, and different sampling patterns (points, lines, regions). METHODS:A diffeomorphic correspondence modeling framework is employed to relate multidimensional breathing signals derived from simulated range images to internal motion patterns represented by diffeomorphic non-linear transformations. Furthermore, an automatic approach for the selection of optimal signal combinations/patterns within this framework is presented. RESULTS:This simulation study focuses on lung motion estimation and is based on 28 4D CT data sets. The results show that the use of multidimensional signals instead of one-dimensional signals significantly improves the motion estimation accuracy, which is, however, highly affected by noise. Only small differences exist between different multidimensional sampling patterns (lines and regions). Automatically determined optimal combinations of points and lines do not lead to accuracy improvements compared to results obtained by using all points or lines. CONCLUSIONS:Our results show the potential of multidimensional breathing signals derived from range images for the model-based estimation of respiratory motion in radiation therapy.
journal_name
Methods Inf Medjournal_title
Methods of information in medicineauthors
Wilms M,Werner R,Blendowski M,Ortmüller J,Handels Hdoi
10.3414/ME13-01-0137subject
Has Abstractpub_date
2014-01-01 00:00:00pages
257-63issue
4eissn
0026-1270issn
2511-705Xpii
13-01-0137journal_volume
53pub_type
杂志文章abstract:OBJECTIVES:Biomedical applications, such as analysis and management of mass spectrometry proteomics experiments, involve heterogeneous platforms and knowledge, massive data sets, and complex algorithms. Main requirements of such applications are semantic modeling of the experiments and data analysis, as well as high pe...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2005-01-01 00:00:00
abstract:OBJECTIVES:As millions of consumers perform health information retrieval online, the mismatch between their terminology and the terminologies of the information sources could become a major barrier to successful retrievals. To address this problem, we studied the characteristics of consumer terminology for health infor...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2002-01-01 00:00:00
abstract:OBJECTIVE:Record linkage of patient data originating from various data sources and record linkage for checking uniqueness of patient registration are common tasks for every cancer registry. In Austria, there is no unique person identifier in use in the medical system. Hence, it was necessary and the goal of this work t...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2005-01-01 00:00:00
abstract::With rapid change in health care requiring greater emphasis on productivity and quality management, occupational health hazards in hospitals have been receiving increasing recognition, now not only focusing on controlling infection, but also on chemical, physical, mechanical as well as psychosocial hazards. Reducing c...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:1998-06-01 00:00:00
abstract::Reliable record linkage is an essential component of the quality of population-based disease registration. Quality assessment of disease registries should, therefore, include quantitative approaches to describe the extent of record-linkage errors. The homonym and synonym rates have been proposed for this purpose. The ...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:1996-03-01 00:00:00
abstract::A problem of identifying the phase response curve of the myocardial pacemaker was investigated using a simple dynamic system model of cardiac arrhythmia. A hybrid optimization method of a genetic algorithm and a local optimization technique was employed to obtain a solution of the model fitting. The method was applied...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:1997-12-01 00:00:00
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
更新日期:2011-01-01 00:00:00
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:10.3414/ME11-01-0049
更新日期:2012-01-01 00:00:00
abstract:OBJECTIVES:This paper describes a methodology for the monitoring of the fetal cardiac health status during pregnancy, through the effective and non-invasive monitoring of the abdominal ECG signals (abdECG) of the mother. METHODS:For this purpose, a three-stage methodology has been developed. In the first stage, the fe...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:10.3414/ME09-01-0041
更新日期:2010-01-01 00:00:00
abstract:OBJECTIVE:Joint data analysis is a key requirement in medical research networks. Data are available in heterogeneous formats at each network partner and their harmonization is often rather complex. The objective of our paper is to provide a generic approach for the harmonization process in research networks. We applied...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:10.3414/ME14-02-0030
更新日期:2015-01-01 00:00:00
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:
更新日期:1995-09-01 00:00:00
abstract:OBJECTIVES:Our objective was to design and develop a mobile clinical decision support system for emergency triage of different acute pain presentations. The system should interact with existing hospital information systems, run on mobile computing devices (handheld computers) and be suitable for operation in weak-conne...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2005-01-01 00:00:00
abstract:OBJECTIVE:To evaluate the effectiveness of a lexico-syntactic pattern (LSP) matching method for ontology enrichment using clinical documents. METHODS:Two domains were separately studied using the same methodology. We used radiology documents to enrich RadLex and pathology documents to enrich National Cancer Institute ...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:10.3414/ME10-01-0020
更新日期:2011-01-01 00:00:00
abstract:OBJECTIVES:In our department, we have been using an Anesthesia Information Management System (AIMS) for five years. In this study, we tested to what extent data extracted from the AIMS could be suitable for the supervision and time-management of operating rooms. METHODS:From 1995 to 1999, all relevant data from 103,26...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2002-01-01 00:00:00
abstract:OBJECTIVES:a) To present a regional health care communication system developed in the North Karelia Hospital District with the help of two EU funded information technology projects namely the TERVE project (1) which was implemented at the national level financed by the regional subsidy 6 of the ERDF and the CHIN projec...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2002-01-01 00:00:00
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:
更新日期:2004-01-01 00:00:00
abstract:BACKGROUND:The barbell squat is a popularly used lower limb rehabilitation exercise. It is also an integral exercise in injury risk screening protocols. To date athlete/patient technique has been assessed using expensive laboratory equipment or subjective clinical judgement; both of which are not without shortcomings. ...
journal_title:Methods of information in medicine
pub_type: 临床试验,杂志文章
doi:10.3414/ME16-01-0141
更新日期:2017-10-26 00:00:00
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journal_title:Methods of information in medicine
pub_type: 杂志文章,评审
doi:10.1160/me0442
更新日期:2007-01-01 00:00:00
abstract::There are three grand challenges for medical informatics policy: (1) What is it? (2) What should it be? (3) How can we influence its development? To address these challenges requires: (1) an historical analysis of medical informatics policies in a representative sample of countries. This should include an account of m...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:1999-12-01 00:00:00
abstract:OBJECTIVES:The analysis of energetic ventricular variable changes during artificial ventilation, obtained by numerical simulation was done. Twenty-one sets of hemodynamic parameters for eight cardiosurgical patients were used to estimate left and right stroke work. The data were collected for three methods of ventilati...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2005-01-01 00:00:00
abstract::Appropriateness and necessity research of various procedures in medicine may be the most complex field of innovation in healthcare and technology assessment. Nevertheless, the appropriateness of the indication of any medical intervention is probably more important than the outcome since even ideal quality components o...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2000-08-01 00:00:00
abstract:INTRODUCTION:This article is part of the Focus Theme of METHODS of Information in Medicine on "Managing Interoperability and Complexity in Health Systems". OBJECTIVES:In previous work, we have defined methods for the extraction of lexical patterns from labels as an initial step towards semi-automatic ontology enrichme...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:10.3414/ME13-02-0026
更新日期:2015-01-01 00:00:00
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:10.3414/ME13-04-0001
更新日期:2013-01-01 00:00:00
abstract::In more and more medical settings, physicians have less and less time to be effective communicators. To be effective, they need accurate, current information about their patients. Tailored health communications can facilitate positive patient-provider communications and foster behavioral changes conducive to health. T...
journal_title:Methods of information in medicine
pub_type: 杂志文章,评审
doi:
更新日期:1998-06-01 00:00:00
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journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2004-01-01 00:00:00
abstract:BACKGROUND:ICD is used for coding medical diagnoses across the world, but there is no globally accepted coding system for health care procedures. The need for the introduction of a common international medical procedure classification has been addressed by the Australian NCCH, which proposed the International Classific...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:10.3414/ME09-01-0007
更新日期:2009-01-01 00:00:00
abstract::A Bayesian decision support system was developed for the diagnosis of rheumatic disorders. Knowledge in this system is represented as evidential weights of findings. Simple weights were calculated as the logarithm of likelihood ratios on the basis of 1,000 consecutive patients from a rheumatological clinic. The effect...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:1991-08-01 00:00:00
abstract::The relationship was studied between the increase in oxygen uptake (VO2) measured breath-by-breath at the mouth, and the increase in femoral artery blood flow measured continuously with pulsed and echo Doppler methods. Five men exercised at 50 W on a knee extension ergometer in both the supine and the upright posture....
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:1997-12-01 00:00:00
abstract:OBJECTIVES:The exchange of medical data from research and clinical routine across institutional borders is essential to establish an integrated healthcare platform. In this project we want to realize the standardized exchange of medical data between different healthcare institutions to implement an integrated and inter...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2006-01-01 00:00:00
abstract:UNLABELLED:The HL7 Clinical Document Architecture (CDA) is an important XML-based standard for the representation of clinical documents. OBJECTIVES:The use of Markup Languages could satisfy the demands of involved healthcare staff as well as the needs of patients, to receive an overview of the patient's treatment duri...
journal_title:Methods of information in medicine
pub_type: 杂志文章
doi:
更新日期:2003-01-01 00:00:00