Microwave tomography systems and methods

1. A method of imaging an object using microwave tomography, wherein the method comprises:

providing one or more antennas positioned relative to an object;

providing boundary condition apparatus comprising an enclosure and configured to change one or more of the orientation, shape, and volume of the enclosure to present a plurality of different boundary conditions relative to the one or more antennas;

delivering electromagnetic energy using at least one of the one or more antennas to irradiate the object resulting in scattered electromagnetic energy for each of the plurality of different boundary conditions presented by the boundary condition apparatus;

sampling the scattered electromagnetic energy using at least one of the one or more antennas for each of the plurality of different boundary conditions; and

reconstructing an image of the object based on the sampled scattered electromagnetic energy.

2. The method of claim 1 , wherein each antenna of the one or more antennas is in a fixed position relative to the object.

3. The method of claim 1 , wherein at least one antenna of the one or more antennas is attached to the object.

4. The method of claim 1 , wherein delivering electromagnetic energy using at least one of the one or more antennas to irradiate the object for each of the plurality of different boundary conditions presented by the boundary condition apparatus comprises delivering electromagnetic energy with each of the one or more antennas individually until each antenna has individually delivered electromagnetic energy to irradiate the object for each of the plurality of different boundary conditions.

5. The method of claim 1 , wherein the enclosure is a conductive enclosure, wherein the method further comprises positioning the object within the conductive enclosure.

6. The method of claim 1 , wherein the boundary condition apparatus presents each of the different boundary conditions by rotating the enclosure relative to the object and the one or more antennas.

7. The method of claim 1 , wherein the one or more antennas comprise less than eight antennas, and wherein the plurality of different boundary conditions comprises at least three different boundary conditions.

8. The method of claim 1 , wherein the method further comprises surrounding the object with a low-loss fluid.

9. A system for use in imaging an object comprising:

one or more antennas positionable relative to an object to be imaged;

boundary condition apparatus comprising an enclosure and configured to change one or more of the orientation, shape, and volume of the enclosure to present a plurality of different boundary conditions relative to the one or more antennas;

wherein the one or more antennas are configured to deliver electromagnetic energy to irradiate an object to be imaged resulting in scattered electromagnetic energy for each of the plurality of different boundary conditions, and wherein the one or more antennas are further configured to sample the scattered electromagnetic energy for each of the plurality of different boundary conditions; and

processing apparatus configured to reconstruct an image of an object based on the sampled scattered electromagnetic energy.

10. The system of claim 9 , wherein each antenna of the one or more antennas is in a fixed position relative to the object.

11. The system of claim 9 , wherein each antenna of the one or more antennas is configured to be attached to the object.

12. The system of claim 9 , wherein the one or more antennas are configured to deliver electromagnetic energy with each of the one or more antennas individually until each antenna has individually delivered electromagnetic energy to irradiate the object for each of the plurality of different boundary conditions.

13. The system of claim 9 , wherein the enclosure is a conductive enclosure.

14. The system of claim 9 , wherein the boundary condition apparatus presents each of the plurality of different boundary conditions by rotating the enclosure relative to the object and the one or more antennas.

15. The system of claim 9 , wherein the one or more antennas comprise less than eight antennas and the plurality of different boundary conditions comprises at least three different boundary conditions.

16. The system of claim 9 , wherein the boundary condition apparatus is further configured to surround the object with a low-loss fluid.

17. A method of imaging an object using microwave tomography, wherein the method comprises:

providing one or more antennas positioned relative to an object to be imaged, wherein each of the one or more antennas is in a fixed position relative to the object;

providing an enclosure around the object and changing one or more of the orientation, shape, and volume of the enclosure to present a plurality of different boundary conditions relative to the object being imaged and the one or more antennas;

delivering electromagnetic energy using at least one of the one or more antennas to irradiate the object resulting in scattered electromagnetic energy for each of the plurality of different boundary conditions;

sampling the scattered electromagnetic energy using at least one of the one or more antennas; and

reconstructing an image of the object based on the sampled scattered electromagnetic energy.

18. The method of claim 17 , wherein the enclosure is a conductive enclosure, wherein changing one or more of the orientation, shape, and volume of the enclosure comprises:

positioning the object within the conductive enclosure; and

rotating the conductive enclosure relative to the object and the one or more antennas to a different position for each of the plurality of different boundary conditions.

19. The method of claim 17 , wherein the enclosure is triangular.

20. The method of claim 17 , wherein the method further comprises surrounding the object with a low-loss fluid.