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

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...

Electro-mechanical Systems

Electro-mechanical Systems

Electromechanical systems are intricate configurations that effectively combine electrical and mechanical elements to achieve a desired outcome. Central to many of these systems is the DC motor, a device that converts electrical energy into mechanical motion, enabling various applications ranging from simple fans to complex robotic mechanisms.
A key component of the DC motor is the armature, a rotating circuit positioned within a magnetic field. As an electric current passes through the...

Torque On A Current Loop In A Magnetic Field

Torque On A Current Loop In A Magnetic Field

The most common application of magnetic force on current-carrying wires is in electric motors. These consist of loops of wire, which are placed between the magnets with a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate, thus converting electrical energy to mechanical energy.
Consider a rectangular current-carrying loop containing N turns of wire, placed in a uniform magnetic field. The net force on a current-carrying loop...

Force On A Current Loop In A Magnetic Field

Force On A Current Loop In A Magnetic Field

Magnetic forces on wires carrying current are most frequently applied in motors. A DC motor is a device that converts electrical energy into mechanical work. In motors, wire loops are enclosed in a magnetic field. When current flows through the loops, the magnetic field applies torque, which causes the shaft to rotate. The direction of the current is reversed once the loop's surface area is lined up with the magnetic field, causing a constant torque on the loop. During the process, commutators...

Torque Free Motion

Torque Free Motion

The torque-free motion refers to the movement of a rigid body in space when no external torques are acting upon it. This type of motion can be observed in environments where there are no external forces or frictions, like in outer space. For example, a rotation of Mars in space is a torque-free motion. Mars is an axisymmetric object, meaning it has an axis of symmetry along which it rotates, designated as the z-axis. The rotating frame of reference is defined such that the center of mass of...

Imaging Studies IV: Magnetic Resonance Imaging

Imaging Studies IV: Magnetic Resonance Imaging

Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...

You might also read

Related Articles

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

Sort by

Same author

A photo-multiplier tube-based hybrid MRI and frequency domain fluorescence tomography system for small animal imaging.

Physics in medicine and biology·2011

Same author

Clinical characteristics and biomarkers of breast cancer associated with choline concentration measured by 1H MRS.

NMR in biomedicine·2010

Same author

Magnetic resonance imaging evaluation of noninflammatory breast cancer with skin involvement after neoadjuvant chemotherapy.

Annals of surgical oncology·2010

Same author

Combined fluorescence and X-Ray tomography for quantitative in vivo detection of fluorophore.

Technology in cancer research & treatment·2010

Same author

Can proton MRS provide useful information for characterizing estrogen receptor status in breast cancer?

Annals of oncology : official journal of the European Society for Medical Oncology·2009

Same author

Does breast density show difference in patients with estrogen receptor-positive and estrogen receptor-negative breast cancer measured on MRI?

Annals of oncology : official journal of the European Society for Medical Oncology·2009

Same journal

A tetrahedral probe constellation approach for measuring canonical momentum in self-organized laboratory plasma.

The Review of scientific instruments·2026

Same journal

High-precision and short duration operating time dispersion in a fast mechanical switch driven by an ultrasonic motor: Modeling, prediction, and compensation.

The Review of scientific instruments·2026

Same journal

Cluster assisted soft-landing hub (CLASH): An instrument for surface desorption and deposition using a pulsed cluster ion source.

The Review of scientific instruments·2026

Same journal

Influence of pre-ionization parameters on multi-channel discharge characteristics of field-distortion switch gaps.

The Review of scientific instruments·2026

Same journal

A Joule-Thomson low-temperature scanning tunneling microscope with vector magnet and rotatable scanning head.

The Review of scientific instruments·2026

Same journal

Fiber-optic triggering of a two-stage high-current linear transformer driver with laser energy below 100 μJ.

The Review of scientific instruments·2026

See all related articles

Search research articles

Related Experiment Video

Updated: Jun 23, 2026

Adaptation of a Haptic Robot in a 3T fMRI

Adaptation of a Haptic Robot in a 3T fMRI

Published on: October 4, 2011

A variable torque motor compatible with magnetic resonance imaging.

W W Roeck¹, S-H Ha, S Farmaka

¹Tu and Yuen Center for Functional Onco-Imaging, University of California, Irvine, California 92697-5020, USA.

The Review of Scientific Instruments

|May 2, 2009

Summary

This summary is machine-generated.

A novel magnetic resonance (MR) compatible motor operates within high magnetic fields, enabling precise gantry rotation for advanced medical imaging and robotic procedures. This innovation overcomes conventional motor limitations in magnetic resonance imaging (MRI) environments.

More Related Videos

Magnetically-Assisted Remote Controlled Microcatheter Tip Deflection under Magnetic Resonance Imaging

Magnetically-Assisted Remote Controlled Microcatheter Tip Deflection under Magnetic Resonance Imaging

Published on: April 4, 2013

Use of a Foot-Induced Digitally Controlled Resistance Device for Functional Magnetic Resonance Imaging Evaluation in Patients with Foot Paresis

Use of a Foot-Induced Digitally Controlled Resistance Device for Functional Magnetic Resonance Imaging Evaluation in Patients with Foot Paresis

Published on: July 7, 2023

Related Experiment Videos

Last Updated: Jun 23, 2026

Adaptation of a Haptic Robot in a 3T fMRI

Adaptation of a Haptic Robot in a 3T fMRI

Published on: October 4, 2011

Magnetically-Assisted Remote Controlled Microcatheter Tip Deflection under Magnetic Resonance Imaging

Magnetically-Assisted Remote Controlled Microcatheter Tip Deflection under Magnetic Resonance Imaging

Published on: April 4, 2013

Use of a Foot-Induced Digitally Controlled Resistance Device for Functional Magnetic Resonance Imaging Evaluation in Patients with Foot Paresis

Use of a Foot-Induced Digitally Controlled Resistance Device for Functional Magnetic Resonance Imaging Evaluation in Patients with Foot Paresis

Published on: July 7, 2023

Area of Science:

Engineering
Medical Imaging
Materials Science

Background:

Conventional motors are incompatible with high magnetic fields inherent in Magnetic Resonance Imaging (MRI).
This limitation restricts the development of advanced imaging techniques and robotic interventions within MRI systems.

Purpose of the Study:

To develop and evaluate a novel motor designed for operation within high magnetic fields of MRI scanners.
To assess the motor's compatibility and performance for applications such as rotating imaging gantries and image-guided robotic procedures.

Main Methods:

A prototype motor was constructed using Magnetic Resonance (MR) compatible materials.
Experimental evaluation involved measuring the motor's performance (start-up torque, rotational speed) and its impact on MR image quality (signal-to-noise ratio) at 1 Tesla.

Main Results:

The MR compatible motor demonstrated a start-up torque of up to 1.37 Nm.
The motor achieved a rotational speed of 196 rpm at 12 V in a 1 Tesla magnetic field.
Experimental results confirmed the motor's compatibility with MR imaging without significant degradation of image quality.

Conclusions:

The developed motor is suitable for MR environments, enabling precise gantry rotation for applications like single photon emission tomography.
This innovation facilitates the integration of robotic systems and advanced imaging modalities within MRI scanners.