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Publication Date: 2015-Nov-26
Document File: 4 page(s) / 128K

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The Prior Art Database


A technique for constructing a modular prefabricated and optimized magnetic resonance MR scan room is disclosed Glass or transparent nonmetallic substrates are used for manufacturing a radiofrequency RF shield panel The RF shield panel is used to construct a RF shielded volume in the MR scan room A layer of electrically conductive material is applied to the glass or transparent nonmetallic substrates The conductive layer may be a metallic mesh Size of the mesh is determined according to RF attenuation or shielding that is required for magnetic resonance imaging MRI scanning application The conductive layer may be vacuum deposited on the glass or transparent nonmetallic substrate The RF shield panel is used in conjunction with a magnet which is made of stainless steel and a conductive floor to construct a continuous RF shielded volume or a room in which an MR scanner can operate

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The present invention relates generally to a magnetic resonance (MR) scan room and more particularly to a technique for constructing a modular and transparent radiofrequency (RF) shielded volume in an MR scan room.

Generally, magnetic resonance (MR) scanner is sensitive to external electromagnetic radio frequency (RF) noise. As a result, the scanner is housed in an RF copper room which is an RF shielded room. The shielded room is covered with an aesthetic material to provide an appearance of a regular scan room where the MR scanner is installed.

Usually, a patient is the only person present inside the RF shielded room. During X-ray exposure, an attendant is not allowed to be present inside the scan room due to radiation concerns. The necessity of keeping the patient enclosed in the RF shielded room arises due to the need of maintaining a low RF noise environment to avoid image artifacts that are generated by external RF noise.

There are various factors that are to be considered while installing the MR scanner room. The factors include construction of an optimal size of the scan room, complexity involved in achieving optimal RF shielding specifications, and logistics of acquiring the shielded room prior to magnet installation, among others. These factors make MR scanner installation one of the most difficult and costly activities among all medical diagnostic tool installations.

Typically, the RF shielded room encompasses an area required for service of hardware inside the scan room, a patient table and a drive system, among others. Such activities require the RF shielded room to have an optimal dimension. Within the total area of the RF shielded room, an actual volume of interest is a volume that requires to be maintained as completely RF shielded from any RF noise. The actual volume is a bore of a magnet where data is acquired and any part of the patient which extends beyond the bore. As a result, the only volume that requires to be shielded from external RF interference is volume occupied by the patient which is external to the magnet.

A conventional MR imaging system comprises an integrated electronic system housing and magnet structure.  The imaging system also includes a radio frequency shield. The housing is coupled to the magnet structure and includes imaging system support electronics. The radio frequency shield is coupled to the housing and prevents radio frequency interference of a radio frequency receiver coil from the imaging system support electronics. However, such conventional MR imaging system is very expensive and installing the integrated system housing is difficult.

It would be desirable to have a technique to construct a cost effective RF shielded scan room which is easy to install.


Figure 1 depicts a left side view of a modular transparent radiofrequency (RF) shielded room.

Figure 2 depicts rear view of the modular t...