Abstract: A device adapted to be inserted into a lumen, the device having a longitudinal axis and comprising: a) a support element extending along the longitudinal axis; b) a tool mechanically mounted on the support element and being adapted to be used near a wall of the lumen on at least a first side of the longitudinal axis; and c) element, the balloon having at least one portion that is less radially expandable than at least one other portion of the balloon, at a same axial position along said support element.

Abstract: An imaging probe for imaging inside a cavity surrounded by a wall, the probe comprising: a) a probe body having a contracted state and an expanded state; and b) at least two imaging sensors, mounted on the probe body and having fields of view in different directions; wherein, when the probe body is in the expanded state, the fields of view of the imaging sensors respectively comprise portions of the wall of the cavity on different sides of the cavity.

Abstract: A probe, with a longitudinal axis, for use in an NMR system, the probe comprising: (a) a plurality of static magnetic field sources which create a static magnetic field that is non-axisymmetric about the longitudinal axis, in a region outside the probe; and (b) at least one antenna, compromising one or more antennas together capable of creating a time-varying magnetic field which is capable of exciting nuclei in a sub-region of the region, and capable of receiving NMR signals from said excited nuclei and generating NMR electrical signals therefrom; wherein the plurality of magnetic field sources comprise adjacent static magnetic field sources that are magnetized in directions that differ by more than 10 degrees and less than 170 degrees.