Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Gaseous emboli detection based on a dual-wavelet transform analysis.

H S Ng1, H Nygaard, J M Hasenkam

  • 1Department of Biomedical Engineering, Engineering College of Aarhus, Aarhus, Denmark.

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
|October 17, 2007
PubMed
Summary
This summary is machine-generated.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

EUFOREA summit in Brussels 2025: inspiring the future of allergy and respiratory care.

Frontiers in allergy·2026
Same author

Shaping the Future of Respiratory Care: A Look Into the Next Decade and Strategic Recommendations by the European Forum for Research and Education in Allergy and Airways Diseases.

Chest·2026
Same author

Frailty is associated with a history of falls among mobility-limited older adults-cross-sectional multivariate analysis from the BIOFRAIL study.

European geriatric medicine·2025
Same author

Applying both the 30-s and the 5-repetition sit-to-stand tests captures dissimilar groups and a broader spectrum of physical abilities in mobility-limited older individuals: results from the BIOFRAIL study.

European geriatric medicine·2024
Same author

Potentially Modifiable Dementia Risk Factors in Canada: An Analysis of Canadian Longitudinal Study on Aging with a Multi-Country Comparison.

The journal of prevention of Alzheimer's disease·2024
Same author

Pre-asthma: a useful concept? A EUFOREA paper. Part 2-late onset eosinophilic asthma.

Frontiers in allergy·2024
Same journal

Assessment of adaptive trabecular bone remodeling around a knee prosthesis stem using the Weinans model.

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine·2026
Same journal

Biomechanical evaluation of a fully cortical-threaded screw for modified cortical bone trajectory fixation: Combined experimental and finite element study.

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine·2026
Same journal

The influence of passive prosthetic knee joints on uneven compliant surface walking among transfemoral amputees under dual-task versus single-task conditions.

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine·2026
Same journal

Bone remodelling around internal fracture fixations used for treating femoral neck fractures: A finite element analysis.

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine·2026
Same journal

Design of a kinematic-compatible passive spinal exoskeleton with parallelepiped units.

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine·2026
Same journal

The tipping point: Friction and thigh length influence imminent falls from a tilting ski lift chair.

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of engineering in medicine·2026
See all related articles

This study introduces a new wavelet transformation algorithm to improve the detection of gaseous emboli using Doppler ultrasound. The enhanced method successfully separates single and double emboli, advancing embolism monitoring capabilities.

Area of Science:

  • Medical Ultrasound
  • Signal Processing
  • Biomedical Engineering

Background:

  • Current Doppler ultrasound systems struggle with detecting multiple microemboli.
  • Accurate detection of gaseous emboli is crucial for effective embolism monitoring.

Purpose of the Study:

  • To develop and validate a novel algorithm for detecting and quantifying single and multiple gaseous emboli.
  • To combine discrete and continuous wavelet transformation for enhanced microembolic signal analysis.

Main Methods:

  • Utilized a flow rig to generate controlled gaseous emboli.
  • Acquired simultaneous Doppler signals and visual validation data.
  • Applied discrete and continuous wavelet transformation for microembolic signal extraction and analysis.

Related Experiment Videos

Main Results:

  • Achieved 100% detection accuracy at low bubble generation frequencies.
  • Observed an estimation error of 7.4% at high bubble generation frequencies, with variations between -7.4% and +3%.
  • Successfully detected and separated single and double emboli; detected but could not quantify emboli clouds.

Conclusions:

  • The proposed wavelet transformation algorithm significantly improves the detection of gaseous emboli.
  • The method demonstrates potential for enhanced detectability in embolism monitoring, particularly for separating simultaneous emboli.
  • Further development may enable quantification of emboli clouds.