Self propelled device having a magnetohydrodynamic propulsion system

1. An in-vivo sensing device comprising:

a sensor;

a duct disposed substantially within the device; and

a propulsion device including a magnetohydrodynamic device.

2. The device of claim 1 , wherein the sensor includes an imager.

3. The device of claim 1 , comprising a magnet disposed within a volume separate from the duct, and wherein the propulsion device includes at least a plurality of electrodes.

4. The device of claim 3 , comprising a yoke connected to the magnet.

5. The device of claim 1 , comprising a set of valves.

6. The device of claim 1 , comprising a receiver.

7. The device of claim 1 , comprising a receiver capable of receiving power from a source external to the device.

8. The device of claim 1 , comprising a receiver capable of receiving control information.

9. The device of claim 8 comprising a controller, wherein per the control information the controller is capable of operating the magnetohydrodynamic device.

10. The device of claim 1 wherein propulsion is provided by propelling fluid, the device comprising:

a set of valves; and

a controller capable of operating the set of valves to provide directional control of fluid flow.

11. The device of claim 1 , comprising a power source.

12. The device of claim 1 , comprising a position unit.

13. The device of claim 1 , comprising a movement detection unit.

14. The device of claim 1 , comprising a coil capable of receiving electromagnetic energy.

15. The device of claim 1 , wherein the duct includes at least an inlet and an outlet.

16. The device of claim 1 , wherein the duct includes a plurality of outlets.

17. The device of claim 1 , wherein the device is an ingestible capsule.

18. An in-vivo imaging device comprising:

an imager;

a power source;

a transmitter;

a duct disposed substantially within the device; and

a magnetohydrodynamic device.