Key Product Information


​​Typical Mounting Methods

Since the vent-to-shield seal is normally the limiting factor in shielding performance, the following waveguide-to-shield seals are recommended.

Soldering and Brazing

Whenever possible, enclosure walls should be fabricated in a horizontal position to allow soldering or brazing in a lightweight (26 gauge copper or galvanized steel) frame to the shield wall. This produces excellent RF seals that provide reliable performance for long periods of time.

Welding

If the shielding material in the walls and ceilings is heavy enough to weld, vents with an angle iron frame should be specified. Since the waveguides are soldered into the frames using 60/40 solder, care should be taken to keep the honeycomb-to-frame joint under 150o Celsius. The preferred installation method is to use a skip welding technique around the frame until the weld line is completely closed.

Gasket Seals

Where soldering and welding are not practical, RF gasket seals can be used. Monel  or tin coated gaskets provide the best RF seal. The mounting surface can be tin-lead plated or plasma-spray tinned. A light cleaning of contact surfaces before assembly will insure maximum seal performance by removing unwanted metal oxides before the seal is formed.

Contact surfaces of mating surfaces should be rigid enough to carry even pressure along the gasket for maximum shielding performance.
Maximum enclosure-to-vent shield performance can be achieved by observing the precautions of compatible metals and by spacing the fasteners at no more than 10.16 cm (4 in) on center.
Whenever metal ducts are connected to the waveguide air vents on a shielded wall, a dielectric spacing collar is needed to create a non-conducting break on the duct. The purpose of this break is to keep RF currents on the surface of metal ducts from transferring to the shield wall and lowering shielding effectiveness. The dielectric break may take the form of a rubber or canvas boot, a wooden spacing collar, or other dielectric medium.

Minimum Resistance to Air Flow

The honeycomb (or hex-tube) design combines the highest shielding performance with the lowest resistance to air flow. Cell geometry allows the maximum amount of open space while uniformity and depth of the honeycomb tubes reduces air turbulence.​

 


 

 

Automatic Opener/Closer For use with Auto-Seal II Door<p>ETS-Lindgren's Automatic Door Opener/Closer (AOC) provides easy access into the MRI with adjustable timing on the opening and closing operation.</p>
CCTV Intercom System ​ETS-Lindgren's CCTV Intercom System is a reliable and efficient method for constant contact between the MRI room and the control room.
EMI/RFI Shielded Waveguide Air Vents ​​​​ETS-Lindgren's Waveguide Air Vents are manufactured to meet a variety of customer requirements. 
Magnetic Active Compensation System (MACS/D™) for MRI ETS-Lindgren's wideband digital Magnetic Active Compensation System (MACS/D™) is a triaxial magnetic field compensator designed to significantly attenuate environmental magnetic fields affecting the image quality of supercon and resistive magnet MRIs and NMRs.
Med-Vizion Graphic Display Panel (GDP) System ​​ETS-Lindgren's Med-Vizion™ LED Graphic Panel MRI Lighting System (Wall) is an advanced lighting technology designed for MRI suite applications.
Med-Vizion LED Down Light ZXR-3500 and ZXR-4000 ​ETS-Lindgren's Med-Vizion™ ZXR Down Light is the latest in lighting technology specially designed for MRI suite applications. It produces the equivalent of a 175 watt incandescent light using only 32 watts of power.
Med-Vizion™ MRI Lighting LED Sheet Lamp Recessed Troffer LFP2x2-40KETS-Lindgren's Med-Vizion™ LFP2x2-40K is a an excellent lighting solution for MRI rooms and other similar applications.
Med-Vizion™ MRI Lighting LED Sheet Lamp Recessed Troffer LFP2x4-40K <p>ETS-Lindgren's Med-Vizion™ Model LFP2x4-40K is a an excellent lighting solution for MRI rooms and other similar applications. </p>
Medical RF Filters ​ETS-Lindgren's Medical RF Filters enable electrical power, lighting and data signals to be brought into the MRI room, through the RF shield. All RF filters are typically located in one area, usually near the penetration panel of the MRI equipment.
OMS™ Sample Draw Oxygen Monitoring System ​​ETS-Lindgren’s Oxygen Monitoring System (OMS) is a sample draw monitoring system that alerts and alarms when oxygen levels fall below safe limits for human health.
SAFESCAN® Ferromagnetic Target Scanner™ ETS-Lindgren's SAFESCAN® Target Scanners are specifically designed for MR safety, and alarm only on detection of ferromagnetic threats.
Safe IV Port for Medical Applications <span class="ms-rteThemeFontFace-1"></span>ETS-Lindgren's Safe IV Port (SIVP) is a cylindrical waveguide that provides safe and easy passage of intravenous (IV) lines into an MRI room, without compromising the RF shield.
SafeScan® Ferromagnetic Detection Systems ETS-Lindgren's SAFESCAN® Single and Dual Pillar Systems offer continuous 'walk by' ferromagnetic detection for hallways or doorways.

Key Features


  • Available in 3.175 mm (1/8 in) and 4.76 mm (3/16 in) Honeycomb Cell Geometry 
  • Adaptable to a Variety of Mounting Flanges and Gasket Techniques 
  • Brass or Steel Core Material with Tin Coating for Superior RF Performance and Corrosion Resistance 
  • Minimal Air Flow Resistance and Pressure Drop 
  • Continuous Solder-fused for Superior Strength and RF Performance

Literature and Videos


 

 

http://www.ets-lindgren.com/products/shielding/medical-shielding/medical-shielding-accessories/11008/1100811<a href="/sites/etsauthor/ProductBrochures/General%20Brochures/Test_and_Measurement_Full_Line.pdf"><img alt="" src="/_layouts/15/IMAGES/icpdf.png" />Test_and_Measurement_Full_Line.pdf</a>

 

 

http://www.ets-lindgren.com/products/shielding/medical-shielding/medical-shielding-accessories/11008/1100811

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