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2002 News

Sleep-EDF Database

Dec. 12, 2002

The Sleep-EDF Database is a collection of sleep recordings from healthy subjects contributed to PhysioBank by Bob Kemp. These recordings are presented in European Data Format (EDF), a standard for archiving and exchanging polysomnographic recordings. It's easy to read and write EDF files using the format converters available in PhysioToolkit.

Applying PhysioNet tools to manage neurophysiological signals

Dec. 12, 2002

A gentle introduction to much of the software available on this site is offered by Applying PhysioNet tools to manage neurophysiological signals, a tutorial with data and hands-on exercises contributed by Jesus Olivan Palacios.

WFDB Software Package updated

Dec. 5, 2002

An arterial blood pressure (ABP) pulse detector for continous ABP signals has been added to version 10.3.1 of the WFDB Software Package, which has just been posted. Read about other new features here.

WFDB Software Package updated

Nov. 26, 2002

Version 10.3.0 of the WFDB Software Package has just been released, with many new features. Highlights include a port to MacOS/X; a new WFDB library interface permitting random access to digitized signals; a new QRS detector; a new application for signal averaging; up-to-date binaries for GNU/Linu x, MS-Windows (including, for the first time, a WFDB DLL), and Solari s; updated manuals; and more.

plt updated

Nov. 17, 2002

Version 2.2 of plt adds support for MacOS/X and an updated manual.

ECG waveform generator for Matlab/Octave

Nov. 13, 2002

A new and improved version of Floyd Harriott's ECG waveform generator has been posted.

mit2edf: convert PhysioBank records to EDF format

Nov. 8, 2002

An application for exporting PhysioBank records in EDF (European Data Format) is now available; find it here [link updated 25 November 2002]. The complementary application for converting EDF recordings into PhysioBank format has been available as part of the WFDB Software Package for several years.

plt updated

Nov. 7, 2002

Version 2.1 of plt, PhysioToolkit's scriptable plotting utility, is now available for GNU/Linux, MS-Windows, and in source form for other platforms.

XView toolkit updated

Oct. 31, 2002

New XView packages have been posted for Red Hat GNU/Linux 7.x and 8.x. XView provides the GUI elements of WAVE and SEMIA; the new packages incorporate many bug fixes and provide a more stable GUI for WAVE and SEMIA under GNU/Linux.

Long-Term ST Database updated

Oct. 30, 2002

Final versions of five complete (24-hour) records from the Long-Term ST Database are now available, together with SEMIA, a tool for viewing the detailed trend data, annotations, and ECG signals from these records. More records from this database will be available shortly.

WFDB Software Package manuals updated

Oct. 26, 2002

New editions of the WFDB Software Package's manuals have been posted, with many revisions, additions, corrections, and cross-references. All are available in HTML for on-line reference as well as in PDF and PostScript versions for download and printing.

Algorithms from the PhysioNet/CinC Challenge 2002

Sept. 26, 2002

The RR interval time series models that were entered into event 1 of the PhysioNet/Computers in Cardiology Challenge 2002 are now available for study. Each of the ten models is implemented as a self-contained C program that can generate a synthetic RR interval time series of at least 24 hours' duration.

Importing data from AHA Database CD-ROMs

Aug. 8, 2002

Using the AHA Database with PhysioToolkit is easier than ever with the new ahaconvert script (batch file) for importing data from AHA CD-ROMs.

Resampling using the WFDB library

June 24, 2002

Most PhysioToolkit software uses the WFDB library to read and write PhysioBank-format files; the library is also available for use in your own programs. Beginning with version 10.2.6, applications that use the WFDB library can choose any convenient sampling frequency, and the library will transparently resample input signals at that frequency.

The MGH/MF Waveform Database

June 10, 2002

The Massachusetts General Hospital/Marquette Foundation (MGH/MF) Waveform Database is a collection of 250 recordings of hemodynamic and electrocardiographic waveforms of patients in critical care units. Typical recordings include three ECG signals, ABP, PAP, CVP, respiratory impedance, and airway CO2 waveforms. The first 25 recordings of the MGH/MF Waveform database are now available here. Update: the entire database is now available.

A brief overview of multifractal time series

May 29, 2002

A brief overview of multifractal time series has been posted in the Tutorials section of PhysioNet.

Results from the PhysioNet/CinC Challenge 2002

May 9, 2002

The top scores for the PhysioNet/Computers in Cardiology Challenge 2002 have now been posted. Congratulations to the winners, and thanks to all who participated!

Event 2 of the PhysioNet/CinC Challenge 2002

April 24, 2002

Event 2 of the PhysioNet/Computers in Cardiology Challenge 2002 has now begun. You are invited to match wits with participants in event 1, who have created a variety of realistic models of interbeat (RR) interval time series. Can you spot the simulations hidden among the real data in the challenge dataset?

Assessing physical activity from a heart rate time series

April 18, 2002

An algorithm for assessing physical activity from a heart rate time series, and a paper describing its development and evaluation, are now available in PhysioToolkit.

WFDB Software Package updated

March 10, 2002

The WFDB Software Package is one of the centerpieces of PhysioToolkit, and is revised frequently. Version 10.2.5 has just been posted, together with an updated set of tutorials and reference manuals. The 10.2 series, which has been tested extensively since mid-October, represents a significant advance over previous versions (see this list of changes and new features); please try it out!

PhysioNet/CinC Challenge 2002

Feb. 14, 2002

We are pleased to announce the latest in our annual series of PhysioNet/Computers in Cardiology Challenges. The topic for this challenge is RR interval time series modeling. Can you create a model that produces realistic short-term and long-term variations in interbeat intervals? Can you distinguish between synthetic and real RR interval time series? Take the challenge!

QRS detection and waveform boundary recognition using ecgpuwave

Feb. 7, 2002

Software for locating waveform boundaries in the ECG (i.e., the beginnings, peaks, and ends of P, QRS, and T waves) has been contributed to PhysioNet. The software can be used to analyze either annotated or unannotated recordings (it includes an implementation of the Pan-Tompkins QRS detection algorithm).

Morphology Representation Using Principal Components

Feb. 5, 2002

A new tutorial, Morphology Representation Using Principal Components, presents practical methods and sample code for deriving noise-tolerant measurements of waveform shape, using the QRS complex of the ECG as an example.

Automated detection of obstructive sleep apnea from the ECG

Feb. 4, 2002

Software for automated detection of obstructive sleep apnea from the ECG has been contributed to PhysioToolkit. The apdet software package was written as an entry in the Computers in Cardiology Challenge 2000.

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