MAGNETICALLY MANEUVERABLE IN-VIVO DEVICE
An in-vivo device includes a magnetic steering unit (MSU) to maneuver it by an external electromagnetic field. The MSU may include a permanent magnets assembly to produce a magnetic force for navigating the device. The MSU may include a magnets carrying assembly (MCA) to accommodate the permanent magnet(s). The MCA may be designed to generate eddy currents, in response to AC magnetic field, to apply a repelling force. The in-vivo device may also include a multilayered imaging and sensing printed circuit board (MISP) to capture and transmit images. The MISP may include a sensing coil assembly (SCA) to sense electromagnetic fields to determine a location/orientation/angular position of the in-vivo device. Data representing location/orientation/angular position of the device may be used by a maneuvering system to generate a steering magnetic field to steer the in-vivo device from one location or state to another location or state.
1 . An electromagnetically maneuverable in-vivo device comprising:
a magnetic steering unit maneuverable by an external electromagnetic field, said magnetic steering unit comprising,
a permanent magnets assembly for interacting with the electromagnetic field to produce a propelling force and a rotational force for moving and rotating the in-vivo device, said permanent magnets assembly comprising at least one permanent magnet, and
a magnet carrying assembly to accommodate the at least one permanent magnet, said magnet carrying assembly capable of interacting with an electromagnetic field to generate eddy currents to produce a repelling force; and
a sensing coil assembly for sensing electromagnetic fields in order to facilitate sensing of a location, orientation and angular position of the in-vivo device, said sensing coil assembly comprising electromagnetic field sensors disposed on one or more printed circuit board sections, wherein at least one of the one or more printed circuit board sections is foldable to make the electromagnetic field sensors mutually perpendicular.
2 . The in-vivo device as in claim 1 , wherein the permanent magnets assembly and the sensing coil assembly partly or fully structurally and concentrically overlap.
3 . The in-vivo device as in claim 1 , wherein the permanent magnets assembly and the sensing coil assembly do not structurally and concentrically overlap.
4 . The in-vivo device as in claim 1 , further comprising a foldable multilayered imaging and sensing printed circuit board, the multilayered imaging and sensing printed circuit board comprising:
a primary printed circuit board branch;
one or more secondary printed circuit board branches intersecting the primary printed circuit board; and
one or more tertiary printed circuit board branches intersecting the secondary printed circuit board,
wherein the primary printed circuit board branch, at least one of the one or more secondary printed circuit board branches, and at least one of the tertiary printed circuit board branches include an electrical circuit, and wherein one or more printed circuit board branches selected from the group consisting of the one or more secondary printed circuit board branches and the one or more tertiary printed circuit board branches include the sensing coils assembly, the sensing coils assembly functionally coupled to the electrical circuit.
5 . The in-vivo device as in claim 4 , wherein portions of the multilayered imaging and sensing printed circuit board include four printed circuit board layers.
6 . The in-vivo device as in claim 4 , wherein a portion of a tertiary printed circuit board branch includes X-Y sensing coils for respectively sensing electromagnetic field components in the X-direction and Y-direction, and wherein another portion of the tertiary printed circuit board branch includes a Z sensing coil for sensing an electromagnetic field component in the Z-direction.
7 . The in-vivo device as in claim 4 , wherein the electrical circuitry comprises an imaging circuitry.
8 . The in-vivo device as in claim 4 , wherein the multilayered imaging and sensing printed circuit board includes rigid portions and flexible portions.
9 . The in-vivo device as in claim 4 , wherein the multilayered imaging and sensing printed circuit board is fully flexible.
10 . The in-vivo device as in claim 4 , wherein the primary printed circuit board branch and the secondary printed circuit board branches are partly rigid and partly flexible.
11 . The in-vivo device as in claim 10 , wherein the primary printed circuit board branch and the secondary printed circuit board branches are foldable such that portions of the primary printed circuit board branch and portions of the secondary printed circuit board branches are parallel and other portions thereof connect the parallel portions.
12 . The in-vivo device as in claim 4 , wherein a tertiary printed circuit board branch is fully flexible.
13 . The in-vivo device as in claim 12 , wherein the tertiary printed circuit board branch is cylindrically foldable.
14 . The in-vivo device as in claim 4 , wherein the sensing coils assembly comprises one or more electromagnetic field sensors.
15 . The in-vivo device as in claim 1 , further comprising a foldable multilayered imaging and sensing printed circuit board comprising:
a primary printed circuit board section, said primary printed circuit board section comprising a first printed circuit board section, a second printed circuit board section, and one or more printed circuit board sections that are disposed in-between the first printed circuit board section and the second printed circuit board section, the first printed circuit board section, second printed circuit board section, and the one or more printed circuit board sections being interconnected via flexible printed circuit board sections; and
the sensing coils assembly, said sensing coils assembly comprising a magnetic field sensing section and a printed circuit board section, the magnetic field sensing section and the printed circuit board section being connected via or to said second printed circuit board section,
wherein the magnetic field sensing section includes sensing coils for sensing electromagnetic fields in two axes, and the printed circuit board section includes a sensing coil for sensing an electromagnetic field in a third axis.
16 . An assembly for an in-vivo device, comprising:
an electrically conductive tubular object for inducing eddy current, the tubular object including a slit for reducing parasitic currents;
two or more electrically conductive annular discs for augmenting the induced eddy current, said conductive annular discs being disposed on the tubular object and forming one or more circumferential open annular channels around the conductive tubular object;
a set of one or more annular permanent magnets held in the one or more annular channels; and
a set of one or more conductive discs for further augmenting the induced eddy current, a first conductive disc being mounted on a first side of the tubular object and a second conductive disc being mounted on a second side of the tubular object opposite the first side.
17 . The assembly as in claim 16 , further comprising one or more batteries contained in a chamber formed by the first conductive disc, the second conductive disc, and a portion of the inner surface of the tubular object.
18 . An in-vivo device comprising a multilayered imaging and sensing printed circuit board according to claim 4 or claim 15 , and an assembly according to claim 16 .
19 . The in-vivo device as in claim 18 , wherein the assembly is contained in or circumscribed by the multilayered imaging and sensing printed circuit board.