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US 9,173,638 B2Granted
Cardiac mechanical assessment using ultrasound
AssigneeBiosense Webster, Inc.
InventorsAssaf Govari, Andres Claudio Altmann, Alexander Levin
Life of this patent
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Abstract
A method for diagnosis includes capturing a sequence of two-dimensional ultrasound images of a moving organ within a body of a patient. At least one contour of the organ is identified in a succession of the images in the sequence and is processed to generate an output indicative of motion of the organ over time.
Claims28
A method for diagnosis of a beating heart, comprising:
- providing a catheter having a position sensor configured to transmit signals used to determine location and orientation coordinates of a distal end of the catheter in a 3-D coordinate frame of reference and an ultrasonic imaging sensor configured to transmit and receive signals used to determine two-dimensional (2D) ultrasound images;
- inserting the catheter into a chamber of the beating heart;
- capturing on an image processor a sequence of two-dimensional (2D) ultrasound images of the beating heart using the catheter the chamber of the heart of a patient, each of the two-dimensional (2D) ultrasound images being associated with a point in time relative to an annotation point in the heart cycle and a location and orientation coordinate of the distal end of the catheter at the point in time relative to the annotation point in time;
- creating an electroanatomical map of the chamber of the beating heart within the 3-D coordinate frame of reference;
- displaying a video of the sequence of 2D images in succession to show motion of the beating heart;
- overlaying the electroanatomical map on the video of the motion of the beating heart using the location and orientation coordinates of the distal end of the catheter at each point in time relative to the annotation point in time;
- freezing the video to display one of the 2D images of the sequence;
- identifying at least one contour of the beating heart on the one frozen image;
- finding the identified at least one contour in each of the other images in the sequence of 2D images;
- analyzing changes in the identified at least one contour in the sequence of 2D images based on the motion of the beating heart by computing a displacement of the identified at least one contour over a period of cyclical movement of the beating heart;
- generating an output in response to analyzing changes of the identified at least one contour;
- and
- displaying the output on the video of the sequence of 2D images.
10 more elements
A method for diagnosis of a beating heart, comprising:
- providing a catheter having a position sensor configured to transmit signals used to determine location and orientation coordinates of a distal end of the catheter in a 3-D coordinate frame of reference and an ultrasonic imaging sensor configured to transmit and receive signals used to determine two-dimensional (2D) ultrasound images;
- inserting the catheter into a chamber of the beating heart;
- capturing on an image processor multiple sequences of ultrasound input images of the beating heart using the catheter in the chamber of the heart of a patient, each of the ultrasound input images being associated with a point in time relative to an annotation point in the heart cycle and a location and orientation coordinate of the distal end of the catheter at the point in time relative to the annotation point in time;
- collecting data that are indicative of respective local values of a physiological parameter at locations on a surface of the beating heart;
- creating an electroanatomical map of the chamber of the beating heart within the 3-D coordinate frame of reference using the data that are indicative of respective local values of the physiological parameter at locations on the surface of the beating heart;
- displaying a video of the sequence of 2D images in succession to show motion of the beating heart;
- freezing the video to display one of the 2D images of the sequence;
- identifying at least one contour of the beating heart on the one frozen image;
- finding the identified at least one contour in each of the other images in the sequence of 2D images;
- analyzing changes in the identified at least one contour in the sequence of 2D images based on the motion of the beating heart by computing a displacement of the at least one contour over a period of cyclical movement of the beating heart;
- generating an output in response to analyzing changes of the identified at least one contour;
- displaying the output on the video of the sequence of 2D images;
- and
- superimposing an indication of changes in the local values on the surface in the three-dimensional images as the beating heart moves in the three-dimensional images in the sequence on the video by overlaying the electroanatomical map on the video of the motion of the beating heart using the location and orientation coordinates of the distal end of the catheter at each point in time relative to the annotation point in time.
11 more elements
Diagnostic apparatus, comprising:
- a catheter having a position sensor configured to transmit signals used to determine location and orientation coordinates of a distal end of the catheter in a 3-D coordinate frame of reference and an acoustic transducer configured to transmit and receive signals used to determine two-dimensional (2D) ultrasound images, the acoustic transducer configured to capture a sequence of two-dimensional ultrasound images of a beating heart within a body of a patient in the 3-D coordinate frame of reference;
- and
- an image processor, which is configured to associate each of the two-dimensional (2D) ultrasound images with a point in time relative to an annotation point in the heart cycle and a location and orientation coordinate of the distal end of the catheter at the point in time relative to the annotation point in time, and create an electroanatomical map of a chamber of the beating heart within the 3-D coordinate frame, wherein the image processor is also configured to:
- (i) display a video of the sequence of 2D images in succession to show motion of the organ and overlay the electroanatomical map on the video of the motion of the beating heart using the location and orientation coordinates of the distal end of the catheter at each point in time relative to the annotation point in time;
- (ii) freeze the video to display one of the 2D images of the sequence;
- (iii) identify at least one contour of the organ beating heart on the one frozen image;
- (iv) find the at least one contour in each of the other images in the sequence of 2D images;
- (v) analyze changes in the at least one contour in the sequence of 2D images based on the motion of the beating heart by computing a displacement of the at least one contour over a period of cyclical movement of the beating heart;
- (vi) generate an output in response to analyzed changes of the at least one contour;
- and (vii) display the output on the video of the sequence of 2D images.
7 more elements
Diagnostic apparatus, comprising:
- an invasive probe comprising a position sensor configured to transmit signals used to determine location and orientation coordinates of a distal end of the probe in a 3-D coordinate frame of reference and an acoustic transducer configured to transmit and receive signals used to determine two-dimensional (2D) ultrasound images, the acoustic transducer also configured to capture multiple ultrasound input images of a beating heart within a body of a patient, the invasive probe, also configured to collect data that are indicative of respective local values of a physiological parameter at locations on a surface of the beating heart;
- and
- an image processor which is configured to associate each of the two-dimensional (2D) ultrasound images with a point in time relative to an annotation point in a heart cycle of the beating heart and a location and orientation coordinate of the distal end of the catheter at the point in time relative to the annotation point in time, and create an electroanatomical map of a chamber of the beating heart within the 3-D coordinate frame, wherein the image processor is also configured to (i) display a video of the sequence of 2D images in succession to show motion of the beating heart and overlay the electroanatomical map on the video of the motion of the beating heart using the location and orientation coordinates of the distal end of the catheter at each point in time relative to the annotation point in time;
- (ii) freeze the video to display one of the 2D images of the sequence;
- (iii) identify at least one contour of the beating heart on the one frozen image;
- (iv) find the at least one contour in each of the other images in the sequence of 2D images;
- (v)_analyze changes in the at least one contour in the sequence of 2D images based on the motion of the beating heart by computing a displacement of the at least one contour over a period of cyclical movement of the beating heart;
- (vi) generate an output in response to analyzing changes of the at least one contour;
- (vii) display the output on the video of the sequence of 2D images;
- and (viii) superimpose an indication of changes in the local values on the surface in the three-dimensional images as the beating heart moves in the three-dimensional images in the sequence on the video.
7 more elements
Dependencies are inferred from the claim text.