Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Assessment of Diffusion and Perfusion

Assessment of Diffusion and Perfusion

Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this principle...

Magnetic Resonance Imaging

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...

You might also read

Related Articles

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

Sort by

Same author

Spatiotemporal velocity-velocity correlation function in fully developed turbulence.

Physical review. E·2017

Same author

Imaging multiple local changes in heterogeneous media with diffuse waves.

The Journal of the Acoustical Society of America·2015

Same author

Probing slow dynamics of consolidated granular multicomposite materials by diffuse acoustic wave spectroscopy.

The Journal of the Acoustical Society of America·2010

Same author

Geometric depolarization in patterns formed by backscattered light.

Optics letters·2004

Search research articles

Related Experiment Video

Updated: May 7, 2026

From Fast Fluorescence Imaging to Molecular Diffusion Law on Live Cell Membranes in a Commercial Microscope

From Fast Fluorescence Imaging to Molecular Diffusion Law on Live Cell Membranes in a Commercial Microscope

Published on: October 9, 2014

Local time in diffusive media and applications to imaging.

Vincent Rossetto¹

¹Université de Grenoble I, LPMMC/CNRS, 25 avenue des Martyrs, 38042 Grenoble CEDEX 09, France.

Physical Review. E, Statistical, Nonlinear, and Soft Matter Physics

|September 17, 2013

Summary

Local time quantifies wave sensitivity in scattering media. This study provides formulas for local time and its fluctuations, enabling accurate mapping of medium property variations.

Area of Science:

Physics
Wave Propagation
Geophysics

Background:

Waves in multiple scattering media become diffuse.
Local medium properties (absorption, velocity, scattering) affect wave fields.
Local time measures wave sensitivity to these properties.

Purpose of the Study:

To introduce the concept of local time in wave propagation.
To provide mathematical expressions for local time and its fluctuations.
To enable inversion algorithms for mapping medium property variations.

Main Methods:

Utilizing random walk theory to define local time.
Deriving expressions for local time in 1D, 2D, and 3D.
Calculating fluctuations of local time.

More Related Videos

Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers

Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers

Published on: July 17, 2012

Real-Time Monitoring of Neurocritical Patients with Diffuse Optical Spectroscopies

Real-Time Monitoring of Neurocritical Patients with Diffuse Optical Spectroscopies

Published on: November 19, 2020

Related Experiment Videos

Last Updated: May 7, 2026

From Fast Fluorescence Imaging to Molecular Diffusion Law on Live Cell Membranes in a Commercial Microscope

From Fast Fluorescence Imaging to Molecular Diffusion Law on Live Cell Membranes in a Commercial Microscope

Published on: October 9, 2014

Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers

Computed Tomography-guided Time-domain Diffuse Fluorescence Tomography in Small Animals for Localization of Cancer Biomarkers

Published on: July 17, 2012

Real-Time Monitoring of Neurocritical Patients with Diffuse Optical Spectroscopies

Real-Time Monitoring of Neurocritical Patients with Diffuse Optical Spectroscopies

Published on: November 19, 2020

Employing wave field correlations to measure variations.

Main Results:

Formulas for local time in various dimensions are presented.
Expressions for local time fluctuations are derived.
Local time is shown to be proportional to wave field variations.

Conclusions:

Local time is a key metric for understanding wave sensitivity in scattering media.
The derived formulas facilitate accurate inversion for medium property variations.
This work provides a foundation for estimating the accuracy of such inversions.