Techniques for detecting magnetic resonance imaging field
First Claim
Patent Images
1. A device comprising:
- a housing configured to be implanted in a patient;
a first magnetic field sensor located at a first location within the housing and configured to measure a first strength of a static magnetic field at the first location;
a second magnetic field sensor located at a second location within the housing and configured to measure a second strength of the static magnetic field at the second location; and
a processor configured to determine that at least one of the first and second strengths is greater than a lower threshold value and, in response to determining that at least one of the first and second strengths is greater than the lower threshold value, determine a difference between the first strength and the second strength and to identify a source of the static magnetic field based on the difference between the first and second strengths.
1 Assignment
0 Petitions
Accused Products
Abstract
A device includes a housing, a first magnetic field sensor, a second magnetic field sensor, and a control module. The housing is configured to be implanted in a patient. The first magnetic field sensor is located at a first location within the housing and is configured to measure a first strength of a magnetic field at the first location. The second magnetic field sensor is located at a second location within the housing and is configured to measure a second strength of the magnetic field at the second location. The control module is configured to identify a source of the magnetic field based on the first and second strengths.
-
Citations
32 Claims
-
1. A device comprising:
-
a housing configured to be implanted in a patient; a first magnetic field sensor located at a first location within the housing and configured to measure a first strength of a static magnetic field at the first location; a second magnetic field sensor located at a second location within the housing and configured to measure a second strength of the static magnetic field at the second location; and a processor configured to determine that at least one of the first and second strengths is greater than a lower threshold value and, in response to determining that at least one of the first and second strengths is greater than the lower threshold value, determine a difference between the first strength and the second strength and to identify a source of the static magnetic field based on the difference between the first and second strengths. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
-
-
13. A method comprising:
-
measuring by a first magnetic field strength sensor a first strength of a static magnetic field at a first location within a housing of an implantable device; measuring by a second magnetic field strength sensor a second strength of the static magnetic field at a second location within the housing of the implantable device; determining that at least one of the first and second strengths is greater than a lower strength threshold value; and in response to determining that at least one of the first and second strengths is greater than the lower threshold value, determining a difference between the first strength and the second strength and identifying a source of the static magnetic field based on the difference between the first and second strengths. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
-
-
21. A system comprising:
-
an implantable medical device (IMD); a first magnetic field sensor connected to the IMD and configured to measure a first strength of a static magnetic field at a first location; a second magnetic field sensor connected to the IMD and configured to measure a second strength of the static magnetic field at a second location; and a processor configured to determine that at least one of the first and second strengths is greater than a lower threshold value and, in response to determining that at least one of the first and second strengths is greater than the lower threshold value determine a difference between the first strength and the second strength and to identify a source of the static magnetic field based on the difference between the first and second strengths. - View Dependent Claims (22, 23, 24, 25, 26, 27, 30)
-
-
28. A non-transitory computer-readable storage medium comprising instructions that cause a programmable processor to:
-
measure by a first magnetic field strength sensor a first strength of a static magnetic field at a first location within a housing of an implantable device; measure by a second magnetic field strength sensor a second strength of the static magnetic field at a second location within the housing of the implantable device; and determine that at least one of the first and second strengths is greater than a lower threshold value and, in response to determining that at least one of the first and second strengths is greater than the lower threshold value, determine a difference between the first strength and the second strength and identify a source of the static magnetic field based on the difference between the first and second strengths. - View Dependent Claims (29, 31, 32)
-
Specification