Deployable guard for portable magnetic resonance imaging devices

1. A system, comprising:

a portable magnetic resonance imaging device; and

a deployable guard device coupled to the portable magnetic resonance imaging device, the deployable guard device further configured to, when deployed, inhibit encroachment within a physical boundary with respect to the portable magnetic resonance imaging device,

wherein, when in an undeployed position, the deployable guard device defines a first region having a first area,

wherein, when in a deployed position, the deployable guard device defines a second inner region having a second area larger than the first area, and

wherein, when in the deployed position, the deployable guard device extends radially further from an imaging region of the portable magnetic resonance imaging device than when the deployable guard is in the undeployed position.

2. The system of claim 1 , wherein deployable guard device comprises an extendible rail having a first diameter in the undeployed position, and a second diameter in the deployed position, and the second diameter is greater than the first diameter.

3. The system of claim 2 , wherein the extendible rail further comprises:

an outer rail; and

an inner rail slidingly engaged within the outer rail in a telescoping manner, such that in the undeployed position, the inner rail is disposed substantially entirely within the outer rail, and, in the deployed position, at least a portion of the inner rail is exposed.

4. The system of claim 3 , wherein the deployable guard device further comprises:

a support track, configured to be secured to the portable magnetic resonance imaging device; and

one or more swing arms, connected at a first end thereof to the support track and connected to the outer rail at a second end thereof.

5. The system of claim 4 , wherein the second end of the one or more swing arms is extended in a radially outward direction from the support track in the deployed position.

6. The system of claim 1 , wherein the physical boundary corresponds to a volume that encompasses a region having a defined magnetic field strength within a range from about 1 Gauss to about 30 Gauss.

7. The system of claim 1 , wherein the physical boundary corresponds to a volume that encompasses a region having a defined magnetic field strength within a range from about 5 Gauss to about 20 Gauss.

8. The system of claim 1 , wherein the deployable guard device is substantially radially symmetrical.

9. The system of claim 1 , wherein the deployable guard device further comprises:

multiple arcuate sections, including a first arcuate section,

wherein when the deployable guard device is in the deployed position, a first point on the first arcuate section is at a first distance from an isocenter of the deployable guard device, and a second point on the first arcuate section is at a second distance from the isocenter, and wherein the first and second distances are different from each other.

10. The system of claim 9 , wherein the multiple arcuate sections each comprise a first rail and a second rail slidingly engaged with the first rail.

11. The system of claim 10 , wherein the first rail comprises a slotted track configured to receive the second rail.

12. The system of claim 1 , wherein the deployable guard device is configured to be moved to the deployed position automatically.

13. A system, comprising:

a portable magnetic resonance imaging system; and

a deployable guard device coupled to the portable magnetic resonance imaging system, the deployable guard device further configured to, when deployed, demarcate a boundary within which a magnetic field strength of a magnetic field generated by the portable magnetic resonance imaging system equals or exceeds a given threshold,

wherein, when in an undeployed position, the deployable guard device defines a first region having a first area,

wherein, when in a deployed position, the deployable guard device defines a second inner region having a second area larger than the first area, and

wherein, when in the deployed position, the deployable guard device extends radially further from an imaging region of the portable magnetic resonance imaging device than when the deployable guard is in the undeployed position.

14. The system of claim 13 , wherein the deployable guard device is configured to be deployed mechanically, pneumatically and/or hydraulically from the undeployed position to the deployed position.

15. The system of claim 13 , wherein the deployable guard device is configured to be moved from the deployed position to the undeployed position mechanically, pneumatically and/or hydraulically.

16. The system of claim 13 , wherein the deployable guard device is configured to be moved to the deployed position automatically.

17. A method for operating a magnetic resonance imaging (MRI) system, the MRI system being coupled to a deployable guard device configured to, when deployed, inhibit encroachment within a physical boundary with respect to the MRI system, the method comprising:

before imaging using the MRI system, moving the deployable guard device from a deployed position to an undeployed position, wherein:

when in the undeployed position, the deployable guard device defines a first region having a first area,

when in the deployed position, the deployable guard device defines a second inner region having a second area larger than the first area, and

when in the deployed position, the deployable guard device extends radially further from an imaging region of the portable magnetic resonance imaging device than when the deployable guard is in the undeployed position;

imaging, using the MRI system; and

after imaging using the MRI system, moving the deployable guard device from the undeployed position to the deployed position.

18. The method of claim 17 , wherein the moving the deployable guard device from the deployed position to the undeployed position is performed automatically.