Methods for assessing health conditions using single coil magnetic induction tomography imaging

• US 9,320,451 B2
• Filed: 02/27/2014
• Issued: 04/26/2016
• Est. Priority Date: 02/27/2014
• Status: Active Grant

• Current Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Original Assignee: Kimberly-Clark Worldwide Incorporated (Kimberly-Clark Corporation)
• Inventors: Feldkamp, Joseph R., Sullivan, Shawn Jeffery
• Primary Examiner(s): Vargas, Dixomara
• Application Number:
  US14/191,967
• Publication Number:
  US 20150238114A1
• Time in Patent Office: 789 Days
• US Class Current: 1/1
• CPC Class Codes: A61B 5/0042 for the brain
• CPC Class Codes: A61B 5/0522 Magnetic induction tomography
• CPC Class Codes: A61B 5/0536 Impedance imaging, e.g. by tomography
• CPC Class Codes: A61B 5/08 Detecting, measuring or recording devices for evaluating the respiratory organs A61B5/0205 takes precedence
• CPC Class Codes: A61B 5/4238 stomach
• CPC Class Codes: A61B 5/425 pancreas
• CPC Class Codes: A61B 5/4255 Intestines, colon or appendix
• CPC Class Codes: A61B 5/4312 Breast evaluation or disorder diagnosis A61B5/0091 takes precedence
• CPC Class Codes: A61B 5/445 Evaluating skin irritation or skin trauma, e.g. rash, eczema, wound, bed sore
• CPC Class Codes: A61B 5/4566 Evaluating the spine A61B5/4561 takes precedence
• CPC Class Codes: A61B 5/702 Posture restraints
• CPC Class Codes: A61B 5/708 Breast positioning means
• CPC Class Codes: A61B 5/7425 Displaying combinations of multiple images regardless of image source, e.g. displaying a reference anatomical image with a live image geometric transforms for image registration G06T3/14; enhancement using image fusion G06T5/50; algorithms for registration of images G06T7/30
• CPC Class Codes: G01R 33/34 Constructional details, e.g. resonators , specially adapted to MR

Abstract

Methods for assessing a health condition of an individual using single coil magnetic induction tomography imaging are provided. A target area for medical imaging on a patient can be identified. A plurality of coil property measurements can be obtained using a single coil. The plurality of coil property measurements can be performed with the single coil at a plurality of discrete locations relative to the target area. The coil property measurements can be processed to generate an image of the conductivity distribution of the target area. The image can be analyzed to assess a health condition of the patient.

Claims

1. A method for assessing a health condition of a patient, the method comprising:

identifying a target area on a patient for medical imaging;

obtaining a plurality of coil property measurements of the target area using a single coil, the plurality of coil property measurements being performed with the single coil at a plurality of discrete locations relative to the target area;

processing the plurality of coil property measurements to generate an image of the conductivity distribution of the target area using a model defining a relationship between coil property measurements obtained by the single coil at a plurality of different positions relative to the target area and a conductivity of the target area; and

outputting the image for assessment of a health condition of the patient.

2. The method of claim 1, wherein the coil property measurement comprises a coil loss measurement indicative of a change in impedance of the single coil resulting from eddy currents induced in the target area when the single coil is placed adjacent to the target area and energized with radio frequency energy.

3. The method of claim 1, wherein at least a portion of the target area is obscured by bone tissue.

4. The method of claim 3, wherein the target area comprises at least a portion of a brain or spinal column.

5. The method of claim 1, wherein the target area is at a location at least partially occupied by a gas.

6. The method of claim 5, wherein the target area comprises one or more of a trachea, a lung, a stomach, or bowels.

7. The method of claim 1, wherein the method further comprises using the image to identify cancerous tissue.

8. The method of claim 7, wherein the target area comprises a breast or a pancreas.

9. The method of claim 1, wherein the method further comprises using the image to assess a burn condition of the patient.

10. The method of claim 1, wherein the plurality of coil property measurements are obtained using a hand held coil device, the hand held coil device comprising the single coil.

11. The method of claim 10, wherein the plurality of coil property measurements are obtained while the single coil is placed on one or more non-conductive sheets overlaying the specimen, the non-conductive sheets having indicia indicative of one or more of the discrete locations.

12. The method of claim 1, wherein the plurality of coil property measurements are obtained while the target area is pressed against an insulative plate, the single coil being positioned at the plurality of discrete locations on the other side of the insulative plate.

13. The method of claim 1, wherein the non-conductive plate has a shape adapted to accommodate the target area to facilitate immobilization of the target area.

14. The method of claim 1, wherein the plurality of coil property measurements are obtained while the patient is located on a table having a non-conductive surface, the single coil being disposed within a cavity located in the table.

15. The method of claim 1, wherein the table comprises one or more non-conductive supports to facilitate immobilization of the target area.

16. The method of claim 1, wherein the patient is a human patient.

17. A method for assessing a health condition of a patient, the method comprising:

identifying a target area on a patient for medical imaging;

obtaining a plurality of coil property measurements of the target area using a single coil of a magnetic induction tomography imaging system, the plurality of coil loss measurements being performed with the single coil at a plurality of discrete locations relative to the target area, the single coil comprising one or more concentric conductive loops arranged in one or more planes on a printed circuit board;

accessing a model defining a relationship between coil property measurements obtained by the single coil at a plurality of different positions relative to the target area and the conductivity distribution of the target area; and

generating an image of the conductivity distribution of the target area from the plurality of coil property measurements based on the model; and

outputting the image for assessment of a health condition of the patient.

18. The method of claim 17, wherein the plurality of coil property measurements are obtained using a hand held coil device, the hand held coil device comprising the single coil.

19. The method of claim 18, wherein the plurality of coil property measurements are obtained while the single coil is placed on one or more non-conductive sheets overlaying the specimen, the non-conductive sheets having indicia indicative of one or more of the discrete locations.

20. The method of claim 17, wherein the plurality of coil property measurements are obtained while the target area is pressed against an insulative plate, the single coil being positioned at the plurality of discrete locations on the other side of the insulative plate.

21. The method of claim 17, wherein the plurality of coil property measurements are obtained while the patient is located on a table having a non-conductive surface, the single coil being disposed within a cavity located in the table.

22. The method of claim 17, wherein the patient is a human patient.