Magnetic resonance elastography apparatus

Patent metadata

Field	Value
Publication number	US-12474426-B2
Application number	US-202318232428-A
Country	US
Kind code	B2
Filing date	Aug 10, 2023
Priority date	Aug 12, 2022
Publication date	Nov 18, 2025
Grant date	Nov 18, 2025

Abstract

A magnetic resonance elastography apparatus, which may include a magnetic resonance apparatus and an elastography apparatus, is described. The magnetic resonance apparatus comprises a scanner unit, a patient receiving region surrounded at least partially by the scanner unit, and a patient couch, which is embodied to introduce a patient into the patient receiving region. The elastography apparatus comprises a drive unit, a vibration applicator which is arranged for an examination on the patient, and a force transmission unit, which is embodied to transmit a drive moment from the drive unit to the vibration applicator. The elastography apparatus comprises an EMC-tight shield housing with a cylindrical radiofrequency hollow conductor, and the drive unit is arranged within the radiofrequency hollow conductor.

First claim

What is claimed is:

1 . A magnetic resonance elastography system, comprising:
a magnetic resonance imaging device, comprising:
a scanner;
a patient receiving region surrounded at least partially by the scanner; and
a patient couch configured to move a patient into the patient receiving region;
a vibration applicator configured to be arranged on the patient for a magnetic resonance elastography examination; and an elastography device that is separate from the vibration applicator, the elastography device comprising:
a driver;
a force transmitter configured to transmit a drive moment from the driver to the vibration applicator; and
an electromagnetic compatibility (EMC)-tight shield housing having a cylindrical radiofrequency (RF) hollow conductor,
wherein the driver is arranged within the RF hollow conductor, and wherein the EMC-tight shield housing enables the elastography device to be disposed adjacent to the patient couch during the magnetic resonance elastography examination.

2 . The magnetic resonance elastography system as claimed in claim 1 , wherein the driver comprises a motor controller, and
wherein the motor controller is arranged within the EMC-tight shield housing.

3 . The magnetic resonance elastography system as claimed in claim 1 ,
wherein the driver and the EMC-tight shield housing are arranged outside the patient receiving region.

4 . The magnetic resonance elastography system as claimed in claim 1 , wherein the RF hollow conductor comprises a non-magnetic and metallic tube.

5 . The magnetic resonance elastography system as claimed in claim 1 , wherein the RF hollow conductor has two end regions, which are arranged in a longitudinal direction of the RF hollow conductor on opposite sides of one another, and
wherein at least one end region of the two end regions of the RF hollow conductor is open.

6 . The magnetic resonance elastography system as claimed in claim 1 , wherein the elastography device further comprises:
a signal transmitter configured to transmit signals to the driver arranged within the RF hollow conductor, and wherein the signal transmitter comprises at least one fiber optic cable.

7 . The magnetic resonance elastography system as claimed in claim 6 , wherein the signal transmitter comprises at least one through filter.

8 . The magnetic resonance elastography system as claimed in claim 7 , wherein the at least one through filter is arranged in contact with the RF hollow conductor and within the RF hollow conductor.

9 . The magnetic resonance elastography system as claimed in claim 1 , wherein the RF hollow conductor has two end regions, which are arranged in a longitudinal direction of the RF hollow conductor on opposite sides of one another, and
wherein each of the two end regions of the RF hollow conductor is open.

10 . The magnetic resonance elastography system as claimed in claim 1 , wherein the RF hollow conductor has two end regions, which are arranged in a longitudinal direction of the RF hollow conductor on opposite sides of one another, and
wherein the driver is disposed in a center of the RF hollow conductor in the longitudinal direction of the RF hollow conductor.

11 . The magnetic resonance elastography system as claimed in claim 1 , wherein the RF hollow conductor has two end regions, which are arranged in a longitudinal direction of the RF hollow conductor on opposite sides of one another, and
wherein one end region of the two end regions of the RF hollow conductor comprises an open region that is open, and wherein the other one of the two end regions of the RF hollow conductor comprises a closed region that is covered.

12 . The magnetic resonance elastography system as claimed in claim 11 , wherein the driver is disposed at the closed region of the RF hollow conductor.

Assignees

• Siemens Healthineers Ag

Inventors

• Höcht Philipp
• Stich Manuel

Classifications

• A61B5/055

  involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging · CPC title

• A61B5/0051

  by applying vibrations · CPC title

• G01R33/422 Primary

  of the radio frequency field · CPC title

• G01R33/56358 Primary

  Elastography · CPC title