ELECTROMAGNETIC DISTORTION DETECTION
First Claim
1. A system configured to detect electromagnetic (EM) distortion, the system comprising:
- a first EM sensor configured to generate a first set of one or more EM sensor signals in response to detection of the EM field, the first EM sensor configured for placement, in use, on a patient;
a processor; and
a memory storing computer-executable instructions to cause the processor to;
calculate one or more baseline values of one or more metrics indicative of a position of the first EM sensor at a first time based on EM sensor signals from the first set of one or more EM sensor signals corresponding to the first time,calculate one or more updated values of the one or more metrics during a time period after the first time based on EM sensor signals from the first set of one or more EM sensor signals corresponding to the time period after the first time,determine that a difference between the one or more updated values and the one or more baseline values is greater than a threshold value, anddetermine that the EM field has been distorted in response to the difference being greater than the threshold value.
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Abstract
Systems and methods for electromagnetic distortion detection are disclosed. In one aspect, the system includes an electromagnetic (EM) sensor configured to generate an EM sensor signal in response to detection of the EM field. The system may also include a processor configured to calculate a baseline value of a metric indicative of a position of the EM sensor at a first time and calculate an updated value of the metric during a time period after the first time. The processor may be further configured to determine that a difference between the updated value and the baseline value is greater than a threshold value and determine that the EM field has been distorted in response to the difference being greater than the threshold value.
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Citations
30 Claims
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1. A system configured to detect electromagnetic (EM) distortion, the system comprising:
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a first EM sensor configured to generate a first set of one or more EM sensor signals in response to detection of the EM field, the first EM sensor configured for placement, in use, on a patient; a processor; and a memory storing computer-executable instructions to cause the processor to; calculate one or more baseline values of one or more metrics indicative of a position of the first EM sensor at a first time based on EM sensor signals from the first set of one or more EM sensor signals corresponding to the first time, calculate one or more updated values of the one or more metrics during a time period after the first time based on EM sensor signals from the first set of one or more EM sensor signals corresponding to the time period after the first time, determine that a difference between the one or more updated values and the one or more baseline values is greater than a threshold value, and determine that the EM field has been distorted in response to the difference being greater than the threshold value. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A non-transitory computer readable storage medium having stored thereon instructions that, when executed, cause at least one computing device to:
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calculate one or more baseline values of one or more metrics indicative of a position of a first electromagnetic (EM) sensor at a first time based on EM sensor signals from a first set of one or more EM sensor signals corresponding to the first time, the first EM sensor configured to generate the first set of one or more EM sensor signals in response to detection of an EM field; calculate one or more updated values of the one or more metrics during a time period after the first time based on EM sensor signals from the first set of one or more EM sensor signals corresponding to the time period after the first time; determine that a difference between the one or more updated values and the one or more baseline values is greater than a threshold value; and determine that the EM field has been distorted in response to the difference being greater than the threshold value. - View Dependent Claims (13, 14, 15, 16, 17)
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18. A method of detecting electromagnetic (EM) distortion, the method comprising:
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calculating one or more baseline values of one or more metrics indicative of a position of a first EM sensor at a first time based on EM sensor signals from a first set of one or more EM sensor signals corresponding to the first time, the first EM sensor configured to generate the first set of one or more EM sensor signals in response to detection of an EM field; calculating one or more updated values of the one or more metrics during a time period after the first time based on EM sensor signals from the first set of one or more EM sensor signals corresponding to the time period after the first time; determining that a difference between the one or more updated values and the one or more baseline values is greater than a threshold value; and determining that the EM field has been distorted in response to the difference being greater than the threshold value. - View Dependent Claims (19, 20, 21, 22, 23)
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24. A system configured to detect electromagnetic (EM) distortion, comprising:
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an EM sensor at a distal end of an instrument, the EM sensor configured to generate one or more EM sensor signals in response to detection of an EM field; a processor; and a memory storing computer-executable instructions to cause the processor to; calculate one or more baseline values of one or more metrics indicative of a velocity of the distal end of the instrument at a first time based on EM sensor signals from the one or more EM sensor signals corresponding to the first time, calculate one or more updated values of the one or more metrics during a time period after the first time based on EM sensor signals from the one or more EM sensor signals corresponding to the time period after the first time, determine that a difference between the one or more updated values and the one or more baseline values is greater than a threshold value, and determine that the EM field has been distorted in response to the difference being greater than the threshold value. - View Dependent Claims (25, 26, 27, 28, 29, 30)
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Specification