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

Computed Tomography

Computed Tomography

Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...

Positron Emission Tomography

Positron Emission Tomography

Positron emission tomography (PET) is a medical imaging technique involving radiopharmaceuticals — substances that emit short-lived radiation. Although the first PET scanner was introduced in 1961, it took 15 more years before radiopharmaceuticals were combined with the technique and revolutionized its potential.
One of the main requirements of a PET scan is a positron-emitting radioisotope, which is produced in a cyclotron and then attached to a substance used by the part of the body being...

Imaging Studies III: Computed Tomography

Imaging Studies III: Computed Tomography

DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...

Imaging Studies II: Positron Emission Tomography and Scintigraphy

Imaging Studies II: Positron Emission Tomography and Scintigraphy

Positron Emission Tomography (PET) is a medical imaging technique that provides crucial insights into the body's physiological functions at a molecular level. It is an indispensable resource for diagnosing, staging, and monitoring various illnesses, notably cancer, neurological disorders, and cardiovascular conditions.
Fundamental Principles of PET

Electron Microscope Tomography and Single-particle Reconstruction

Electron Microscope Tomography and Single-particle Reconstruction

Transmission electron microscopy (TEM) can be used to determine the 3D structure of biological samples with the help of techniques such as electron microscope tomography and single-particle reconstruction. While single-particle reconstruction can examine macromolecules and macromolecular complexes in vitro conditions only, tomography permits the study of cell components or small cells in vivo.
Electron Tomography
Electron tomography can be performed either in TEM or STEM (scanning transmission...

Potential Due to a Polarized Object

Potential Due to a Polarized Object

A neutral atom consists of a positively charged nucleus surrounded by a negatively charged electron cloud. When placed in an external electric field, the external electric force pulls the electrons and nucleus apart, opposite to the intrinsic attraction between the nucleus and the electrons. The opposing forces balance each other with a slight shift between the center of masses of the nucleus and the electron cloud, resulting in a polarized atom. On the other hand, a few molecules, like water,...

You might also read

Related Articles

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

Sort by

Same author

Backreaction of stimulated Hawking radiation in an optical analogue.

Nature·2026

Same author

Mean weighted residuals reveal systematic overestimation of Bragg intensities in single-crystal diffraction.

Journal of applied crystallography·2026

Same author

Two metrics for quantifying systematic errors in diffraction experiments: systematic errors in the variance of the observed intensities and agreement factor gap.

Journal of applied crystallography·2025

Same author

Bias caused by a popular weighting scheme.

Journal of applied crystallography·2025

Same author

Roadmap on Label-Free Super-Resolution Imaging.

Laser & photonics reviews·2024

Same author

Progress in detection of and correction for low-energy contamination.

Journal of applied crystallography·2023

Search research articles

Related Experiment Video

Updated: Jul 19, 2026

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space

Published on: February 1, 2016

Ambiguities in the scattering tomography for central potentials.

Awatif Hendi¹, Julian Henn, Ulf Leonhardt

¹Science and Medical Studies, Female Section, King Saud University, P.O. Box 22452, Riyadh 11495, Saudi Arabia.

Physical Review Letters

|October 10, 2006

Summary

Scientists uncovered scattering ambiguities in central potentials, revealing that scattering acts as a tomographic projection. This finding could enable invisibility devices without requiring infinite phase velocity.

More Related Videos

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera

Published on: January 30, 2020

Cryo-Electron Tomography Remote Data Collection and Subtomogram Averaging

Cryo-Electron Tomography Remote Data Collection and Subtomogram Averaging

Published on: July 12, 2022

Related Experiment Videos

Last Updated: Jul 19, 2026

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space

A Basic Positron Emission Tomography System Constructed to Locate a Radioactive Source in a Bi-dimensional Space

Published on: February 1, 2016

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera

Visualization of Low-Level Gamma Radiation Sources Using a Low-Cost, High-Sensitivity, Omnidirectional Compton Camera

Published on: January 30, 2020

Cryo-Electron Tomography Remote Data Collection and Subtomogram Averaging

Cryo-Electron Tomography Remote Data Collection and Subtomogram Averaging

Published on: July 12, 2022

Area of Science:

Physics
Optics
Materials Science

Background:

Invisibility devices leverage ambiguities in the inverse scattering problem.
Scattering is crucial for understanding material structures.
Central potentials are fundamental in physics and describe interactions.

Purpose of the Study:

To elucidate the nature of scattering ambiguities in central potentials.
To explore the relationship between scattering data and potential functions.
To investigate the theoretical possibility of creating invisibility devices.

Main Methods:

Mathematical analysis of the inverse scattering problem.
Characterization of scattering as a tomographic projection.
Investigation of multivalued scattering functions and angles.
Application of scattering theory to invisibility device design.

Main Results:

Scattering is shown to be a tomographic projection of a scattering function onto the impact parameter.
Multivalued scattering functions can lead to ambiguities, where different potentials yield identical scattering data.
Multivalued scattering angles also contribute to these ambiguities.
The theory demonstrates the potential for constructing invisibility devices without infinite phase velocity.

Conclusions:

Scattering ambiguities in central potentials are well-defined and linked to tomographic projections.
Understanding these ambiguities is key to advancing invisibility technology.
It is theoretically possible to achieve invisibility without violating fundamental physics principles like finite phase velocity.