Publications for Christer Ahlström
Co-author map based on ISI articles 2007-

Keywords

valve transit stenosis sounds sound sleepiness signal severity recurrence phonocardiographic patients nonlinear murmurs murmur heart energy dogs classification blood aortic

Journal Articles

Christer Ahlström, Marcus Nystrom, Kenneth Holmqvist, Carina Fors, David Sandberg, Anna Anund, Goran Kecklund and Torbjorn Akerstedt
  Fit-for-duty test for estimation of drivers sleepiness level: Eye movements improve the sleep/wake predictor
  Transportation Research Part C: Emerging Technologies, 2013, 26, 20-32.
 Web of Science® Times Cited: 7

A. Hurtig-Wennlof, Christer Ahlström, R. Egerlid, M. Resare, Per Ask and P. Rask
  Heart sounds are altered by open cardiac surgery
  Experimental and Clinical Cardiology, 2009, 14(2), 18-20.
 Web of Science® Times Cited: 1

Ingrid Ljungvall, Christer Ahlström, Katja Hoglund, Peter Hult, Clarence Kvart, Michele Borgarelli, Per Ask and Jens Haggstrom
  Use of signal analysis of heart sounds and murmurs to assess severity of mitral valve regurgitation attributable to myxomatous mitral valve disease in dogs
  AMERICAN JOURNAL OF VETERINARY RESEARCH, 2009, 70(5), 604-613.
 Web of Science® Times Cited: 10

Ingrid Ljungvall, Christer Ahlström, Katja Höglund, Peter Hult, Clarence Kvart, Michele Borgarelli, Per Ask and Jens Häggström
  Assessing mitral regurgitation attributable to myxomatous mitral valve disease in dogs using signal analysis of heart sounds and murmurs
  , 2008, , .

Christer Ahlström, Katja Höglund, Peter Hult, Jens Häggström, Clarence Kvart and Per Ask
  Assessing Aortic Stenosis using Sample Entropy of the Phonocardiographic Signal in Dogs
  IEEE Transactions on Biomedical Engineering, 2008, 55(8), 2107-2109.
 Web of Science® Times Cited: 5

Christer Ahlström, Toste Länne, Per Ask and Anders Johansson
  A method for accurate localization of the first heart sound and possible applications
  Physiological Measurement, 2008, 29(3), 417-428.
   Fulltext  PDF  
 Web of Science® Times Cited: 12

K. Hoglund, Christer Ahlström, J. Haggstrom, Per Ask, Peter Hult and C. Kvart
  Time-frequency and complexity analyses for differentiation of physiologic murmurs from heart murmurs caused by aortic stenosis in boxers
  American Journal of Veterinary Research, 2007, 68(9), 962-969.
 Web of Science® Times Cited: 11

Christer Ahlström, Anders Johansson, Peter Hult and Per Ask
  Chaotic dynamics of respiratory sounds
  Chaos, Solitons & Fractals, 2006, 29(5), 1054-1062.
 Web of Science® Times Cited: 9

Anders Johansson, Christer Ahlström, Toste Länne and Per Ask
  Pulse wave transit time for monitoring respiration rate
  Medical and Biological Engineering and Computing, 2006, 44(6), 471-478.
 Web of Science® Times Cited: 14

Christer Ahlström, Peter Hult, Peter Rask, Jan-Erik Karlsson, Eva Nylander, Ulf Dahlström and Per Ask
  Feature Extraction for Systolic Heart Murmur Classification
  Annals of Biomedical Engineering, 2006, 34(11), 1666-1677.
 Web of Science® Times Cited: 35

Christer Ahlström, Anders Johansson, Fredrik Uhlin, Toste Länne and Per Ask
  Noninvasive investigation of blood pressure changes using the pulse wave transit time: A novel approach in the monitoring of hemodialysis patients
  Journal of Artificial Organs, 2005, 8(3), 192-197.

Christer Ahlström, Olle Liljefeldt, Peter Hult and Per Ask
  Heart sound cancellation from lung sound recordings using recurrence time statistics and nonlinear prediction
  IEEE Signal Processing Letters, 2005, 12(12), 812-815.
   Fulltext  PDF  
 Web of Science® Times Cited: 12

Conference Articles

Christer Ahlström, Anders Johansson, Toste Länne and Per Ask
  Monitorering av andning and blodtrycksförändringar baserat på EKG och hjärtljud
  Medicinteknik dagarna,2007, 2007.


Christer Ahlström, Per Ask, Peter Rask, Jan-Erik Karlsson, Eva Nylander, Ulf Dahlström and Peter Hult
  Assessment of Suspected Aortic Stenosis by Auto Mutual Information Analysis of Murmurs
  Engineering in Medicine and Biology Society, 2007. EMBS 2007, 2007.


 Web of Science® Times Cited: 2

Christer Ahlström, Peter Hult, P Rask, J-E Karlsson, Eva Nylander, Ulf Dahlström and Per Ask
  Using the intelligent stethoscope for extraction of features for systolic heart murmur classification
  World Congress on Medical Physics and Biomedical Engineering WC2006,2006, 2006.


K Höglund, Christer Ahlström, J Häggström and C Kvart
  Spectral analysis of heart murmurs in boxer dogs
  16th European College of veterinary Internal medicine - Companion Animals Congress ECVIM-CA,2006, 2006.


Christer Ahlström, Katja Höglund, Peter Hult, Jens Häggström, Clarence Kvart and Per Ask
  Distinguishing Innocent Murmurs from Murmurs caused by Aortic Stenosis by Recurrence Quantification Analysis
  ROCEEDINGS OF WORLD ACADEMY OF SCIENCE, ENGINEERING AND TECHNOLOGY, VOL 18, 2006.


 Web of Science® Times Cited: 1

Linda Rattfält, Christer Ahlström, Lena Berglin, Maria Lindén, Peter Hult, Per Ask and Urban Wiklund
  A Canonical correlation approach to heart beat detection in textile ECG measurements
  IET 3rd International Conference On Advances in Medical, Signal and Information Processing, 2006. MEDSIP 2006, 2006.


Christer Ahlström, Peter Hult and Per Ask
  Thresholding distance plots using true recurrence points
  Acoustics, Speech and Signal Processing, 2006. ICASSP 2006, 2006.


Christer Ahlström, Peter Hult and Per Ask
  Detection of the 3rd Heart Sound using Recurrence Time Statistics
  Proc. 31st IEEE Int. Conf. on Acoustics, Speech and Signal Processing, Toulouse, France, 2006, 2006.


Peter Hult, Christer Ahlström, Linda Rattfält, Cecilia Hagström, Nils-Erik Pettersson and Per Ask
  The intelligent stethoscope
  EMBEC05,2005, 2005.


Christer Ahlström, Peter Hult and Per Ask
  Wheeze analysis and detection with non-linear phase-space embedding
  Nordic Baltic Conference Biomedical Engineering and Medical Physics,2005, 2005.


Peter Hult, Christer Ahlström, Linda Rattfält, Caroline Hagström, Nils-Erik Pettersson and Per Ask
  The intelligent stethoscope as a tool in modern health care
  Nordic Baltic Conference Biomedical Engineering and Medical Physics,2005, 2005.


Christer Ahlström, Anders Johansson, Toste Länne and Per Ask
  A respiration monitor based on electrocardiographic and photoplethysmographic sensor fusion
  IEEE Engineering in Medical and Biological Society,2004, 2004.


Christer Ahlström, Peter Hult, Birgitta Schmekel and Per Ask
  Automatisk detektering av ronki med icke-linjära metoder
  Svenska Läkaresällskapets riksstämma,2004, 2004.


Christer Ahlström, Peter Hult, Birgitta Schmekel and Per Ask
  Wheeze detection with nonlinear statespace embedding
  International Lung Sound Association,2004, 2004.


Ph.D. Theses

Christer Ahlström
  Nonlinear phonocardiographic Signal Processing
  2008.


  Fulltext PDF

Licentiate Theses

Christer Ahlström
  Processing of the Phonocardiographic Signal: methods for the intelligent stethoscope
  2006.


  Fulltext PDF