Curtain and shielded chamber for shielding an electromagnetic field

Patent metadata

Field	Value
Publication number	US-12120859-B2
Application number	US-202218090846-A
Country	US
Kind code	B2
Filing date	Dec 29, 2022
Priority date	Dec 29, 2021
Publication date	Oct 15, 2024
Grant date	Oct 15, 2024

Abstract

A curtain for shielding an electromagnetic field may include a plurality of strip elements. A first strip element and a second strip element of the plurality of strip elements may have an electrically conductive layer. In a shielding configuration of the curtain, the electrically conductive layer of the first strip element is electrically connected to the electrically conductive layer of the second strip element and/or to an electrical connecting terminal for a reference potential. The plurality of strip elements can be variably positioned against one another.

First claim

The invention claimed is:

1. A curtain for shielding an electromagnetic field, comprising:
a plurality of strip elements, including a first strip element and a second strip element, each of the first and second strip elements having an electrically conductive layer, the plurality of strip elements being configured to be variably positioned against one another, wherein:
the first strip element and the second strip element are configured to be disconnected mechanically and electrically from one another;
in a shielding configuration of the curtain, the electrically conductive layer of the first strip element is electrically connected to the electrically conductive layer of the second strip element and/or to an electrical connecting terminal having a reference potential; and
the first strip element and the second strip element are configured to provide an automatic return of the curtain into the shielding configuration.

2. The curtain as claimed in claim 1 , wherein the respective electrically conductive layer is a coating, a foil, a wire, a wire mesh, an arrangement of metal links and/or a carbon matrix.

3. The curtain as claimed in claim 1 , wherein the electrically conductive layer includes a protective layer that at least partially enclose the respective electrically conductive layer, the protective layer is configured to:
protect against contact of the electrically conductive layer, and/or
protect the respective electrically conductive layer from an external influence.

4. The curtain as claimed in claim 3 , wherein the plurality of strip elements and/or the respective protective layers include a flexible material configured to be reversibly deformed during relative positioning of the first strip element with respect to the second strip element.

5. The curtain as claimed in claim 1 , wherein the electrically conductive layer of the first strip element is electrically connected, by a contact element, to the electrically conductive layer of the second strip element and/or to the connecting terminal.

6. The curtain as claimed in claim 5 , wherein the contact element is a comb, a brush, a mesh and/or a fabric.

7. The curtain as claimed in claim 1 , further comprising: a retainer that is mechanically connected to the first strip element and to the second strip element, the retainer being configured to retain the first strip element and the second strip element in the shielding configuration at an aperture to an examination room.

8. The curtain as claimed in claim 1 , wherein the curtain is in electrical contact with the reference potential, and wherein the curtain is configured to facilitate an equalizing current to the reference potential to counteract an effect of the electromagnetic field.

9. The curtain as claimed in claim 1 , wherein the first strip element is electrically connected to a frame element and/or to a floor bar, the frame element and/or the floor bar being electrically connected to the reference potential, and wherein the curtain is configured to conduct away an electric current to the frame element and/or the floor bar.

10. A shielded chamber for a magnetic resonance apparatus, comprising:
a curtain configured to shield an electromagnetic field, the curtain including a plurality of strip elements, wherein a first strip element and a second strip element of the plurality of strip elements each have an electrically conductive layer, the first strip element and the second strip element being configured to be disconnected mechanically and electrically from one another; and
an aperture configured to allow access to the shielded chamber, the curtain being arranged at the aperture, wherein:
in a shielding configuration of the curtain, the electrically conductive layer of the first strip element is electrically connected to the electrically conductive layer of the second strip element of the plurality of strip elements and/or to a reference potential;
the plurality of strip elements are configured to be variably positioned against one another along a main extension direction; and
the plurality of strip elements are configured to provide an automatic return of the curtain into the shielding configuration.

11. The shielded chamber as claimed in claim 10 , further comprising at least one sensor configured to determine whether the curtain is correctly in the shielding configuration and output a signal based on the determination.

12. The shielded chamber as claimed in claim 11 , wherein the at least one sensor is a resistance sensor configured to determine a resistance of each of the electrically conductive layers of the plurality of strip elements.

13. The shielded chamber as claimed in claim 11 , wherein the at least one sensor is an optical sensor configured to determine a deviation of the curtain from the shielding configuration.

14. A magnetic resonance system comprising:
a magnetic resonance apparatus; and
a shielded chamber including:
a curtain configured to shield an electromagnetic field, the curtain including a plurality of strip elements, wherein a first strip element and a second strip element of the plurality of strip elements each have an electrically conductive layer;
an aperture configured to allow access to the shielded chamber, the curtain being arranged at the aperture, wherein: in a shielding configuration of the curtain, the electrically conductive layer of the first strip element is electrically connected to the electrically conductive layer of the second strip element of the plurality of strip elements and/or to a reference potential, and the plurality of strip elements are configured to be variably positioned against one another along a main extension direction;
a sensor configured to determine: whether the curtain is correctly in the shielding configuration, a resistance of each of the electrically conductive layers of the plurality of strip elements, and/or a deviation of the curtain from the shielding configuration; and
a controller having a signal connection to the sensor, the controller being configured to control the magnetic resonance apparatus to perform a magnetic resonance measurement based on the determination by the sensor.

15. The magnetic resonance system as claimed in claim 14 , wherein the shielded chamber further comprises a door configured to provide, in a shielding position, shielding from an electromagnetic field, the controller being configured to: monitor the shielding position of the door, and control the magnetic resonance apparatus to perform the magnetic resonance measurement based on the a parameter of the magnetic resonance measurement and the determination by the sensor, in response to the door deviating from the shielding position, wherein the parameter of the magnetic resonance measurement comprises an indicator about an admissibility of performing the magnetic resonance measurement when the door deviates from the shielding position.

16. A shielded chamber for a magnetic resonance apparatus, comprising:
a curtain configured to shield an electromagnetic field, the curtain including a plurality of strip elements, wherein a first strip element and a second strip element of the plurality of strip elements each have an electrically conductive layer;
at least one sensor configured to: determine whether the curtain is correctly in a shielding configuration, and output a signal based on the determination; and
an aperture configured to allow access to the shielded chamber, the curtain being arranged at the aperture, wherein:
in the shielding configuration of the curtain, the electrically conductive layer of the first strip element is elec

Assignees

• Siemens Healthineers Ag

Inventors

• Sukkau Johann
• Wullenweber Michael

Classifications

• H05K9/0003

  Shielded walls, floors, ceilings, e.g. wallpaper, wall panel, electro-conductive plaster, concrete, cement, mortar · CPC title

• H05K9/0069

  Methods for measuring the shielding efficiency; Apparatus therefor; Isolation container for testing · CPC title

• H05K9/0007

  Casings (standardised racks H05K9/0062) · CPC title

• H05K9/0052 Primary

  Shielding other than Faraday cages · CPC title

• G01R33/422 Primary

  of the radio frequency field · CPC title