National Institutes of Health, a Component of the US Dept. of Health & Human Services

Siemens Healthcare Gmbh

King's College London

Centre National De La Recherche Scientifique

Institut National De La Sante Et De La Recherche Medicale

Siemens Healthineers Ag

Centre National De La Recherche Scientifique-cnrs

UniversitÉ De Paris

Universite Paris Cité

Institut National De La Sante Et De La Recherche Medicale (inserm)

Univ Paris Xiii Paris-nord Villetaneuse

Universite Paris Xiii Paris-nord

Ahmed M Gharib

Ralph Sinkus

Omar Darwish

Wilfried Schnell

Giacomo Annio

Tamara Elisabeth Falkner

Radhouene Neji

Verena Müller-Reinwald

Khaled Z Abd-Elmoniem

Roderic I Pettigrew

The present disclosure is directed to a motor for a magnetic resonance (MR) tomography room, to a patient table for the MR room, to a MR elastography device, and to a MR tomography device. A MR tomography device for a MR elastography imaging protocol is arranged within the MR tomography room, and includes a rotational drive for supplying rotational energy to power a MR elastography transducer usable during the MR elastography imaging protocol, and a support structure. The rotational drive comprises a terminal for connecting the MR elastography transducer to the rotational drive, and a bearing means configured such that the position of the terminal relative to the support structure is adaptable along a trajectory predetermined by the bearing means. The rotational drive is mounted to the support structure via the bearing means.

Motor for a MR elastography transducer

The present disclosure is directed to techniques for synchronizing a rotational eccentric mass of a gravitational transducer used for a magnetic resonance elastography acquisition with a corresponding magnetic resonance elastography scan carried out by a magnetic resonance imaging system, wherein the rotation of the eccentric mass is driven by a shaft. The method includes starting the rotation of the eccentric mass at a set vibration frequency and the magnetic resonance elastography scan at a set acquisition frequency; determining the rotational position of the shaft; defining the rotational position as first reference position; calculating further reference positions. At the start time of each subsequent acquisition period, determining the current rotational position of the shaft; comparing the determined current rotational position with the theoretically expected reference position and decreasing or increasing the rotational speed of the rotational eccentric mass based on the comparison.

Method and system for synchronizing a rotational eccentric mass with a magnetic resonance elastography scan

One aspect of the present subject matter provides an imaging method including: receiving a trigger signal; after a period substantially equal to a trigger delay minus an inversion delay, applying a non-selective inversion radiofrequency pulse to a region of interest followed by a slice-selective reinversion radiofrequency pulse to a slice of the region of interest of a subject; and after lapse of the trigger delay commenced at the cardiac cycle signal, acquiring a plurality of time-resolved images of the slice of the region of interest from an imaging device.

Imaging and diagnostic methods, systems, and computer-readable media

Growing community of inventors

Bethesda, MD, United States of America

Ahmed M Gharib