Patent Number: 
Section: claims

1. A method of shielding surroundings from radiation emitted by an X-ray system externally positioned around the periphery of a region of interest located inside an object, the method comprising:providing at least one radiation shield assembly connectable to the X-ray system, said radiation shield assembly includes a support base operatively connectable to a radiation source or a radiation detector of the X-ray system, and a plurality of individually controllable radiation shield segments sequentially positioned relative to said support base and extendable towards the object;determining a chosen proximity of a free end of at least one of said radiation shield segments to an opposing portion of the object; andindividually actuating and extending or retracting one or more of said at least one radiation shield segments relative to said support base, until said free end is at said chosen proximity to said opposing portion of the object. 2. The method according to claim 1, further comprising:repeating determining and individually actuating said at least one of said radiation shield segments, or/and said at least one or more others of said radiation shield segments, until collectively forming a contiguous radiopaque screen spanning at least partially around the periphery of the region of interest with an edge contoured correlatively with a surface curvature of the object. 3. The method according to claim 1, wherein determining is performed by using at least one positioning sensor configured for detecting positioning of at least one of said radiation shield segments relative to the object. 4. The method according to claim 3, wherein individually actuating is performed by using a drive mechanism configured for extending or/and retracting a selected number of said radiation shield segments in correlation to said position detecting. 5. The method according to claim 4, wherein determining and actuating are performed by at least one control unit. 6. The method according to claim 3, wherein said positioning sensor is coupled to at least one of said radiation shield segments and senses and reacts to positioning or proximity of said at least one free end relative to said opposing portion of the object, or to a contact therebetween. 7. The method according to claim 6, wherein said positioning sensor detects a portion of the radiation emitted by said radiation source and leaking through said plurality of radiation shield segments. 8. The method according to claim 1, wherein the control unit individually extends or retracts a plurality of radiation shield segments relative to a support base or/and to one or more other radiation shield segments. 9. The method according to claim 8, wherein one or more radiation shield segments and/or groups of radiation shield segments are controlled by a plurality of controllers, wherein each of said controllers is configured for controlling a single separate unit or group of said units. 10. The method according to claim 8, comprising retracting a single separate unit or group of said radiation shield segments with an individual driver.