Method and apparatus for automated selection of correct image for quantitative analysis
First Claim
Patent Images
1. A method for synchronizing frames of imaging data with physiologic data, comprising the following steps:
- (a) acquiring frames of imaging data representing a succession of images of a patient'"'"'s heart during a study using an imaging system;
(b) automatically time stamping each acquired frame with respective times generated by a first clock;
(c) automatically determining respective offsets of said first clock relative to a reference clock for each time stamp associated with said acquired frames;
(d) storing said acquired frames and said time stamps and said offsets associated with said acquired frames;
(e) acquiring physiologic data from said patient during said study using a hemodynamic monitoring system;
(f) automatically time stamping data in said acquired physiologic data representing one or more predetermined cardiac events with respective times generated by a second clock;
(g) automatically determining respective offsets of said second clock relative to said reference clock for each time stamp associated with said physiologic data; and
(h) storing said acquired physiologic data and said time stamps and said offsets associated with said acquired physiologic data.
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Abstract
A method for selecting images for coronary analysis using time stamps to correlate cardiovascular images to corresponding physiological or hemodynamic monitoring, e.g., ECG, data. The method uses time stamps that are intrinsic to a distributed network clock synchronization protocol for correlation of images and data. A coronary analysis system is employed to correlate images with physiologic data, e.g., using time stamp data as well as offset data derived using the distributed network clock synchronization protocol.
55 Citations
37 Claims
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1. A method for synchronizing frames of imaging data with physiologic data, comprising the following steps:
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(a) acquiring frames of imaging data representing a succession of images of a patient'"'"'s heart during a study using an imaging system;
(b) automatically time stamping each acquired frame with respective times generated by a first clock;
(c) automatically determining respective offsets of said first clock relative to a reference clock for each time stamp associated with said acquired frames;
(d) storing said acquired frames and said time stamps and said offsets associated with said acquired frames;
(e) acquiring physiologic data from said patient during said study using a hemodynamic monitoring system;
(f) automatically time stamping data in said acquired physiologic data representing one or more predetermined cardiac events with respective times generated by a second clock;
(g) automatically determining respective offsets of said second clock relative to said reference clock for each time stamp associated with said physiologic data; and
(h) storing said acquired physiologic data and said time stamps and said offsets associated with said acquired physiologic data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A cardiology analysis system comprising an operator interface, a display monitor and a computer programmed to perform the following steps:
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compensating for a lack of synchronism between a first clock used to time stamp a plurality of acquired frames of imaging data and a second clock used to time stamp acquired physiologic data representing predetermined cardiac events; and
selecting a first selected frame that was acquired at a time substantially the same as the time when a first predetermined cardiac event occurred based on the results of said compensating step. - View Dependent Claims (19, 20, 21, 22, 23)
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24. A system comprising:
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an imaging system programmed to time stamp acquired frames of imaging data based on time measured by a first local clock;
a hemodynamic monitoring system programmed to time stamp acquired physiologic data corresponding to predetermined cardiac events based on time measured by a second local clock; and
a first computer programmed to communicate reference clock time to said imaging system and to said hemodynamic monitoring system in accordance with a network time synchronization protocol, wherein said imaging system and said hemodynamic monitoring system are each further programmed to perform the following steps;
(a) calculating a respective link delay;
(b) calculating a respective local offset; and
(c) associating each of said local offsets with a respective time stamp. - View Dependent Claims (25, 26, 27, 28, 29)
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30. A system comprising:
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an imaging system programmed to time stamp acquired frames of imaging data based on time measured by a first local clock;
a hemodynamic monitoring system programmed to time stamp acquired physiologic data corresponding to predetermined cardiac events based on time measured by a second local clock; and
a first computer programmed to communicate reference clock time to said imaging system and to said hemodynamic monitoring system in accordance with a network time synchronization protocol, wherein said imaging system and said hemodynamic monitoring system are each further programmed to perform the following steps;
(a) calculating a respective link delay;
(b) calculating a respective local offset; and
(c) adjusting a respective one of said first and second local clocks to match said reference clock, said time stamps of said imaging system and said hemodynamic monitoring system being respectively derived from said adjusted first and second local clocks. - View Dependent Claims (31, 32, 33, 34, 35)
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36. A method for synchronizing a frame of imaging data with a physiologic datum, comprising the following steps:
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(a) automatically determining a first offset of a first local clock relative to a reference clock, said first local clock dictating the time of day in an imaging system;
(b) automatically adjusting said first local clock by an amount that is a function of said first offset to synchronize said first local clock with said reference clock;
(c) automatically determining a second offset of a second local clock relative to said reference clock, said second local clock dictating the time of day in an hemodynamic monitoring system;
(d) automatically adjusting said second local clock by an amount that is a function of said second offset to synchronize said second local clock with said reference clock;
(e) acquiring a frame of imaging data representing an image of a patient'"'"'s heart during a study using said imaging system;
(f) automatically time stamping said acquired frame with a time generated by said adjusted first local clock;
(g) storing said acquired frame and said time stamp associated with said acquired frame as an imaging file;
(h) acquiring physiologic data from said patient during said study using said hemodynamic monitoring system;
(i) automatically time stamping a datum in said acquired physiologic data representing a predetermined cardiac event with a time generated by said adjusted second local clock; and
(j) storing said acquired physiologic data and said time stamp associated with said acquired physiologic data as a physiology file. - View Dependent Claims (37)
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Specification