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 Concept Videos

Trial and Error and Algorithm01:12

Trial and Error and Algorithm

424
A problem-solving strategy is a plan of action used to find a solution. Different strategies have distinct action plans. Trial and error involves trying different solutions until one works. For instance, to fix a broken printer, you might check ink levels, ensure the paper tray isn't jammed, and verify the printer's connection to your laptop. This method can be time-consuming but is commonly used. Thomas Edison, for example, used trial and error to find a suitable filament for the light...
424
Continuing Care01:25

Continuing Care

2.0K
Continuing care describes the variety of health, personal, and social services provided over a prolonged period. The need for continuing care is increasing because people are living longer. Many people do not have families or others to care for them. Continuing care is mainly for patients who are disabled, functionally dependent, or suffering from a terminal disease. It is available within institutional settings or in homes. Examples include nursing centers or facilities, assisted living,...
2.0K
Continuity of a Function01:23

Continuity of a Function

247
A function is continuous at a point a if three conditions are met: the function is defined at a, the limit of the function as x approaches a exists, and this limit equals the function’s value. Mathematically, this is written asThis definition ensures the graph of the function does not exhibit any breaks, holes, or jumps at that point. Discontinuities occur when any of these conditions fail. A removable discontinuity exists when the two-sided limit exists but the function is either...
247
Continuity Equation01:28

Continuity Equation

3.3K
The continuity equation asserts that the mass flow rate must remain constant for a steady flow of an incompressible fluid within a confined system. This principle applies to systems where fluid passes through varying cross-sectional areas, such as nozzles, syringes, and pipes.
The mass flow rate is expressed as:
3.3K
Continuity Equation01:20

Continuity Equation

1.5K
The total amount of current flowing per unit cross-sectional area is called the current density. Hence, the current passing through a cross-sectional area can be written as the surface integral of the current density.
1.5K
Design Example: Calculating Safe Diameter for Wind-Exposed Disc01:17

Design Example: Calculating Safe Diameter for Wind-Exposed Disc

359
Assessing safety in wind-exposed installations is crucial to preventing potential failures. This example explores the calculation and design adjustments needed to mount a circular disc on a building facade, where wind forces are a primary concern. A 4-meter diameter disc was initially designed as an aesthetic feature facing winds at a velocity of 25 meters per second, with an air density of 1.25 kilograms per cubic meter. Given these conditions, the drag force on the disc was determined using...
359

You might also read

Related Articles

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

Sort by
Same author

Defining Ultrasound-Guided Nerve Block Competency for Emergency Medicine: A Delphi-Method Consensus Statement.

AEM education and training·2026
Same author

Micro-UltraSound In Cancer - Active Surveillance (MUSIC-AS): A paired, prospective, non-inferiority trial comparing micro-ultrasound and multiparametric MRI at confirmatory biopsy.

Contemporary clinical trials communications·2026
Same author

External Validation of the PRI-MUS Scoring System: A Secondary Analysis of the OPTIMUM Randomized Controlled Trial.

The Journal of urology·2026
Same author

Re: Hopkin et al.: Assessing the efficacy of ophthalmic transfers to an academic level 1 trauma hospital: diagnostic accuracy and intervention rate (Ophthalmology. 2026;133:24-30).

Ophthalmology·2026
Same author

The THOR network best practices for females of childbearing potential with life-threatening hemorrhage: Guidance for emergency medical services and hospitals.

Transfusion·2026
Same author

Training level and analgesic outcomes of ultrasound-guided nerve blocks in the emergency department: An analysis from the NURVE block registry.

The American journal of emergency medicine·2026
Same journal

Multidimensional Safety Assessment of a Low-Intensity Scanning Ultrasound (SUS) Protocol in Sheep.

Ultrasound in medicine & biology·2026
Same journal

Acoustic Characterization of a Modified IEC Agar-Based Tissue-Mimicking Material Across the 3.5-50 MHz Frequency Range.

Ultrasound in medicine & biology·2026
Same journal

Deep Learning-Based Standard Section Recognition and Multi-Organ Segmentation in Upper Abdominal Ultrasound.

Ultrasound in medicine & biology·2026
Same journal

Cardiac Natural Mechanical Wave Detection and Speed Estimation Using Deep Learning-Based 2-D Ultrasound Imaging: A Feasibility Study.

Ultrasound in medicine & biology·2026
Same journal

Region-Specific Evaluation of Plaque Segmentation in Cross-sectional Projections of Carotid Ultrasound Images Using Deep Learning Models in a Sub-clinical Atherosclerosis Cohort.

Ultrasound in medicine & biology·2026
Same journal

Simulating the Dedifferentiation Process of Thyroid Cancer: Insights from Mouse Models and Ultrasound Imaging.

Ultrasound in medicine & biology·2026
See all related articles

Related Experiment Video

Updated: Feb 5, 2026

Author Spotlight: Utilizing Venoplasty Balloon Model in Rodents to Simulate Surgical Interventions for Deep Veins
05:44

Author Spotlight: Utilizing Venoplasty Balloon Model in Rodents to Simulate Surgical Interventions for Deep Veins

Published on: May 24, 2024

1.1K

Continuous Inferior Vena Cava Diameter Tracking through an Iterative Kanade-Lucas-Tomasi-Based Algorithm.

Barry Belmont1, Ross Kessler2, Nikhil Theyyunni2

  • 1Department of Biomedical Engineering, University of Michigan, Ann Arbor, Michigan, USA.

Ultrasound in Medicine & Biology
|September 15, 2018
PubMed
Summary
This summary is machine-generated.

This study introduces an automated ultrasound technique to track inferior vena cava diameter changes in critically ill patients. The automated method shows high accuracy and precision, comparable to expert measurements, for improved critical care assessment.

Keywords:
Cardiac collapsibility indexFeature trackerFluid responsivenessInferior vena cava

More Related Videos

Image Acquisition Method for the Sonographic Assessment of the Inferior Vena Cava
06:59

Image Acquisition Method for the Sonographic Assessment of the Inferior Vena Cava

Published on: January 13, 2023

4.6K
Stenosis of the Inferior Vena Cava: A Murine Model of Deep Vein Thrombosis
05:37

Stenosis of the Inferior Vena Cava: A Murine Model of Deep Vein Thrombosis

Published on: December 22, 2017

25.9K

Related Experiment Videos

Last Updated: Feb 5, 2026

Author Spotlight: Utilizing Venoplasty Balloon Model in Rodents to Simulate Surgical Interventions for Deep Veins
05:44

Author Spotlight: Utilizing Venoplasty Balloon Model in Rodents to Simulate Surgical Interventions for Deep Veins

Published on: May 24, 2024

1.1K
Image Acquisition Method for the Sonographic Assessment of the Inferior Vena Cava
06:59

Image Acquisition Method for the Sonographic Assessment of the Inferior Vena Cava

Published on: January 13, 2023

4.6K
Stenosis of the Inferior Vena Cava: A Murine Model of Deep Vein Thrombosis
05:37

Stenosis of the Inferior Vena Cava: A Murine Model of Deep Vein Thrombosis

Published on: December 22, 2017

25.9K

Area of Science:

  • Critical Care Medicine
  • Medical Imaging
  • Ultrasound Technology

Background:

  • Inferior vena cava (IVC) ultrasound is vital for assessing fluid status in critically ill patients.
  • Respiratory-induced changes in IVC size reflect volemic status.
  • Manual IVC measurement can be time-consuming and subject to inter-observer variability.

Purpose of the Study:

  • To develop and validate an automated ultrasound technique for continuous tracking of the IVC diameter.
  • To assess the accuracy and precision of this automated method against expert measurements.
  • To explore the potential for automated critical care ultrasound applications.

Main Methods:

  • Development of an automated algorithm using Kanade-Lucas-Tomasi feature tracking and pyramidal segmentation.
  • Continuous tracking of IVC diameter during ultrasound examinations.
  • Comparison of automated measurements with those from trained ultrasound physicians in 47 spontaneously breathing patients.

Main Results:

  • High agreement between automated and physician measurements was observed (intra-class correlation coefficients: 0.897 for max diameter, 0.967 for min diameter, 0.975 for caval index).
  • Over 95% of measurements agreed within 10% of the IVC collapse.
  • Observed and reported variability in the cardiac collapsibility index.

Conclusions:

  • The developed automated ultrasound technique accurately and precisely tracks IVC diameter.
  • This algorithmic approach offers a reliable foundation for future automated critical care ultrasound measures.
  • Automated IVC assessment can enhance the evaluation and management of critically ill patients.