DE102005018435A1 - Screened housing for display projector is used with magnetic resonance tomography systems - Google Patents

Abstract

The projector housing [1] is produced of a screening non metallic metal and this encapsulates the projection system. The light output is through a high frequency filtered tube [2] and ventilation air passes through a screened filter [3].

Description

The The invention relates to a housing and / or encapsulation for electrical and electronic equipment, such as image projectors and Monitors, in particular for use in the field of magnetic resonance tomography, hereinafter referred to as MRI and also for other medical-technical areas in which magnetic field radiation or high-frequency radiation occurs.

The MRI is a procedure established in the neurosciences, i.a. for imaging the functioning human brain, its application in addition to the observation of the brain area often a parallel stimulation of the patient or subjects and evaluation of the reactions thereof in the form of a suitable feedback requires.

Known are magnetic field tolerant and low-interference Projectors for use in MRI facilities and their environment with low energy.

Such Projectors are not suitable for MRI with high energy density. you disturb the function of the same so much that a consideration of brain areas impossible or at least severely impaired.

task The invention is a housing and / or an encapsulation for Projectors and / or monitors for placement in MRI and / or their Environment to create the interference from projectors and / or shields effectively from monitors and thus only a proper function of the MRI.

As well should the ventilation, in particular the ventilation openings of the projector and / or the monitor and the power supply of the same sufficiently against leaking interference radiation be shielded.

The casing or the wrapping should be designed and measured so that it is different Types of projectors and / or monitors is customizable as well usable for it remains.

maintenance, Assembly and repair work on the projector should largely executable without tools be.

According to the invention Task as with the claims indicated solved.

To is the case and / or encapsulation for a projector and / or monitor of magnetic field and high frequency radiation made of shielding materials.

The Projection light outlet opening of the projector is designed as a high-frequency filter tube. The screen The monitor is equipped with an electrically conductive transparent glass covered. The electrical supply lines for power supply and signal transmission are complete shielded against high-frequency radiation and magnetic field effect and their connections and fasteners are slotted, axially rotatable and multi-level offset trained and arranged.

For one Projector lamp replacement corresponding openings are arranged. The vents from projector and / or monitor are with honeycomb filters against high-frequency Radiation and / or magnetic field effect provided. At unfavorable or cramped space can for projector beam and / or monitor image suitable deflecting mirror be arranged. The Light exits are provided with brackets for receiving light filter discs.

The inventive design of housings and / or capsules of projectors and / or monitors allowed the non-interfering Use of same in MRI facilities and their surroundings against both high-frequency radiation as well as against magnetic fields.

The Device leaves easily adapt to existing MRI systems.

below The invention is based on two embodiments explained in more detail. In the associated Drawings are with

1 a shielding capsule for a projector with projection light opening, connection point for electric cables and air filters as well as with

2 a shielding capsule for a monitor with specially encapsulated connection point for electrical cables and multi-stepped closure for cable entry and air filters
shown schematically.

Example 1

The capsule 1 is designed to accommodate a known projector and is designed as a rectangular shielding metal housing made of non-magnetic steel sheet.

The capsule has the light exit opening 2 on, which is designed as a high-frequency filter tube and is provided with holders for receiving light filter discs.

The vents 3 are equipped with shielding honeycomb filters.

The connection point 4 for electrical operating and signal cables is also completely shielded by means of cover.

All electrical conductors are shielded and protected by means of shielded 3-way slotted, axially rotatable locking elements in the capsule 1 over the shielded connection point 4 introduced.

A such encapsulated installation allows the trouble-free operation of MRI also outside of Radiation range of 30 mT.

The Capsule allows a use of projectors of different design and fabrication.

The required projection image So easily on a 25 cm × 21 cm large projection screen in the Channel of the MRI, well visible to the Patient or the subject, project.

Example 2

The capsule 5 is dimensioned to accommodate a known monitor and is designed as a rectangular shielding metal housing made of non-magnetic sheet steel.

The capsule 5 indicates the picture opening 6 which is formed with a shielding, electrically conductive transparent disc and is provided with holders for receiving light filter discs.

The vents 8th is equipped with a shielding honeycomb filter.

The connection point 7 for electrical operating and signal cables is also completely shielded by means of cover.

All electrical conductors are shielded and protected by means of shielded 3-way slotted, axially rotatable locking elements in the capsule 5 over the shielded connection point 7 introduced.

A such encapsulated installation allows the trouble-free operation of MRI also outside of Radiation range of 30 mT.

The Capsule allows a use of monitors of different types and fabrication.

The required image is so easily in the channel of the MRI, well visible for the Patient or the subject.

Claims (3)

Housing and / or capsule ( 1 . 5 ) for electrical and electronic equipment in rooms with special requirements for low interference, in particular for projectors and / or monitors for use in the field of magnetic resonance tomography, wherein the housing and / or the capsule ( 1 . 5 ) consists of magnetic field and / or high-frequency signals shielding materials or such composite materials and wherein the projection light exit opening ( 2 ) of the projector is designed as a high-frequency filter tube and the projection light exit opening ( 2 ) is equipped with holders for light filter discs or at least one electrically conductive disk or the screen opening ( 6 ) is covered for a monitor with at least one electrically conductive transparent pane and wherein all electrical conductors are shielded against the magnetic field and / or against high-frequency radiation and the closure elements ( 7 ) slotted, axially rotatable and multi-stage offset and are arranged and arranged and wherein the housing and / or capsule openings ( 4 . 7 ) are provided for the electrical line connections with removable and tight-fitting lids against radio frequency radiation and magnetic field effect and wherein the ventilation openings ( 3 . 8th ) are provided with special honeycomb filters or other filters for shielding against magnetic field effects and / or high-frequency radiation. Housing and / or capsule ( 4 . 7 ) according to claim 1, characterized in that at the projection light exit and image openings ( 2 . 6 ) of the same light filter discs are attachable. Housing and / or capsule ( 1 . 7 ) according to claims 1 and 2, characterized in that deflecting mirrors are arranged in the light beam path.