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

Glassware Calibration01:11

Glassware Calibration

1.4K
Accurate calibration of glassware, such as volumetric flasks, pipettes, and burettes, is essential to ensure accurate measurements in the analytical laboratory. Calibration helps maintain consistency across measurements and prevents errors arising from inaccurate volumes.
Volumetric flasks: Volumetric flasks are designed to prepare aqueous solutions of precise volumes accurately with a calibration line on the neck. To calibrate a volumetric flask, it is important to fill it with distilled...
1.4K
Instrument Calibration01:12

Instrument Calibration

755
Instrument calibration is essential for ensuring that instruments produce accurate and consistent results. It is vital in manufacturing, healthcare, testing laboratories, and scientific research. Calibration processes are specific to each instrument and help enhance data accuracy. Each instrument has a unique calibration process tailored to its design and function to improve data accuracy.
Analytical Balance Calibration
An analytical balance measures mass and requires regular calibration to...
755
Calibration Curves: Correlation Coefficient01:10

Calibration Curves: Correlation Coefficient

4.9K
In a linear calibration curve, there is a value called the calibration coefficient, denoted by 'r,' which measures the strength and the direction of association between two variables. The correlation coefficient value ranges from −1 to +1. A value of +1 indicates a perfect positive linear correlation, −1 denotes a perfect negative correlation, and 0 implies no correlation between the two variables. A positive correlation value establishes that as one variable increases, the...
4.9K
Plotting and Calibrating the Root Locus01:19

Plotting and Calibrating the Root Locus

471
Root loci often diverge as system poles shift from the real axis to the complex plane. Key points in this transition are the breakaway and break-in points, indicating where the root locus leaves and reenters the real axis. The branches of the root locus form an angle of 180/n degrees with the real axis, where n is the number of branches at a breakaway or break-in point.
The maximum gain occurs at the breakaway points between open-loop poles on the real axis, while the minimum gain is...
471
Calibration Curves: Linear Least Squares01:20

Calibration Curves: Linear Least Squares

4.5K
A calibration curve is a plot of the instrument's response against a series of known concentrations of a substance. This curve is used to set the instrument response levels, using the substance and its concentrations as standards. Alternatively, or additionally, an equation is fitted to the calibration curve plot and subsequently used to calculate the unknown concentrations of other samples reliably.
For data that follow a straight line, the standard method for fitting is the linear...
4.5K
Ultrasound II: Endoscopic Ultrasound and FibroScan01:25

Ultrasound II: Endoscopic Ultrasound and FibroScan

691
Endoscopic Ultrasound (EUS) and FibroScan are valuable diagnostic tools in gastroenterology and hepatology, each with specific applications and techniques.
Endoscopic Ultrasound (EUS):
691

You might also read

Related Articles

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

Sort by
Same author

Exploratory Assessment of Pulsed-Wave Doppler Representations of Lung Sounds Using Deep Learning: An In-Vitro Phantom Study.

medRxiv : the preprint server for health sciences·2026
Same author

Direct-Necrosis-Monitoring-Based Adaptive Model Predictive Control for Ablation Therapy Including Patient-Specific Residual Heat Management.

Annals of biomedical engineering·2026
Same author

Absolute Quantitative Photoacoustic Imaging for Contrast Agents Concentration Estimation Using a Spectral Decomposition Approach.

Molecular imaging·2026
Same author

Robot-assisted minimally invasive photoacoustic imaging for monitoring liver ablation using diffusing fiber illumination.

Journal of biomedical optics·2026
Same author

Cross-Modality Registration using Bone Surface Pointcloud for Robotic Ultrasound-Guided Spine Surgery.

Journal of medical robotics research·2025
Same author

Automatic photoacoustic monitoring of perinatal brain hypoxia with superior sagittal sinus detection.

Journal of biomedical optics·2025

Related Experiment Video

Updated: Feb 1, 2026

Manufacturing Abdominal Aorta Hydrogel Tissue-Mimicking Phantoms for Ultrasound Elastography Validation
09:32

Manufacturing Abdominal Aorta Hydrogel Tissue-Mimicking Phantoms for Ultrasound Elastography Validation

Published on: September 19, 2018

15.9K

Phantom with multiple active points for ultrasound calibration.

Haichong K Zhang1, Alexis Cheng1, Younsu Kim1

  • 1The Johns Hopkins University, Department of Computer Science, Baltimore, Maryland, United States.

Journal of Medical Imaging (Bellingham, Wash.)
|December 8, 2018
PubMed
Summary

This study introduces a novel ultrasound (US) calibration method using multiple active points, improving accuracy and speed for computer-assisted interventions. The new technique simplifies calibration by reducing manual searching, enhancing tracking precision.

Keywords:
active-echocalibration phantomultrasound calibration

More Related Videos

Patient-Specific Polyvinyl Alcohol Phantom Fabrication with Ultrasound and X-Ray Contrast for Brain Tumor Surgery Planning
08:41

Patient-Specific Polyvinyl Alcohol Phantom Fabrication with Ultrasound and X-Ray Contrast for Brain Tumor Surgery Planning

Published on: July 14, 2020

9.1K
Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging
04:54

Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging

Published on: June 16, 2023

3.8K

Related Experiment Videos

Last Updated: Feb 1, 2026

Manufacturing Abdominal Aorta Hydrogel Tissue-Mimicking Phantoms for Ultrasound Elastography Validation
09:32

Manufacturing Abdominal Aorta Hydrogel Tissue-Mimicking Phantoms for Ultrasound Elastography Validation

Published on: September 19, 2018

15.9K
Patient-Specific Polyvinyl Alcohol Phantom Fabrication with Ultrasound and X-Ray Contrast for Brain Tumor Surgery Planning
08:41

Patient-Specific Polyvinyl Alcohol Phantom Fabrication with Ultrasound and X-Ray Contrast for Brain Tumor Surgery Planning

Published on: July 14, 2020

9.1K
Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging
04:54

Author Spotlight: A Stable Phantom Material for Optical and Acoustic Imaging

Published on: June 16, 2023

3.8K

Area of Science:

  • Medical Imaging
  • Robotics
  • Biomedical Engineering

Background:

  • Accurate ultrasound (US) image tracking is crucial for computer-assisted interventions.
  • Current US calibration methods are limited by elevational beam thickness, impacting accuracy.
  • Existing active-echo (AE)-based calibration is time-consuming and requires specialized hardware.

Purpose of the Study:

  • To present a novel US calibration concept using multiple active points.
  • To develop a mathematical framework for fast and accurate US calibration.
  • To simplify the calibration procedure and reduce calibration time.

Main Methods:

  • Developed a multiple active-point phantom for US calibration.
  • Created a mathematical framework for processing active-point data.
  • Demonstrated the concept using a robot arm to track a US probe.
  • Validated the method through simulation and experimental studies.

Main Results:

  • Achieved submillimeter calibration accuracy.
  • Significantly reduced the time and complexity of the midplane search.
  • The multiple active-point phantom demonstrated superior calibration performance.

Conclusions:

  • The proposed multiple active-point US calibration method offers a faster and more accurate alternative.
  • This technique has potential for applications demanding high tracking accuracy in medical interventions.
  • Simplifies calibration by minimizing midplane search and reducing overall procedure time.