System and method to measure cardiac ejection fraction

• US 20060025689A1
• Filed: 05/17/2005
• Published: 02/02/2006
• Est. Priority Date: 06/07/2002
• Status: Abandoned Application

• Current Assignee: Verathon Incorporated (Roper Technologies, Inc.)
• Original Assignee: Verathon Incorporated (Roper Technologies, Inc.)
• Inventors: Dudycha, Stephen, McMorrow, Gerald, Chalana, Vikram, Shankle, Steven J.
• Application Number:
  US11/132,076
• Publication Number:
  US 20060025689A1
• Time in Patent Office: Days
• US Class Current: 600/456
• CPC Class Codes: A61B 6/503 for diagnosis of the heart
• CPC Class Codes: A61B 6/541 involving acquisition triggered by a physiological signal
• CPC Class Codes: A61B 8/065 to determine blood output from the heart in general A61B5/029
• CPC Class Codes: A61B 8/0883 for diagnosis of the heart
• CPC Class Codes: A61B 8/462 characterised by constructional features of the display
• CPC Class Codes: A61B 8/483 involving the acquisition of a 3D volume of data

Abstract

A system and method to acquire 3D ultrasound-based images during the end-systole and end end-diastole time points of a cardiac cycle to allow determination of the change and percentage change in left ventricle volume at the time points.

Claims

1. A method to determine cardiac ejection volume of a heart comprising:

positioning an ultrasound transceiver to probe a first portion of a heart of a patient, a transceiver adapted to obtain 3D images;

recording a first 3D image during an end-systole time point;

recording a second 3D image during an end-diastole time point;

enhancing the images of a heart in a 3D images with a plurality of algorithms;

measuring the volume of a left ventricle from the enhanced images of a first and second 3D images; and

calculating a change in volume of a left ventricle between a first and second 3D images.

3. The method of claim 1, wherein plurality of scanplanes are acquired from a rotational array, a translational array, or a wedge array.

2. A method to determine cardiac ejection volume comprising:

positioning an ultrasound transceiver to probe a first portion of a heart of a patient, to obtain a first 3D images at the end-systole time point;

re-positioning the ultrasound transceiver to probe a second portion of a heart to obtain a second 3D image at the end-diastole time point;

enhancing the images of a heart in a 3D images with a plurality of algorithms;

registering the scanplanes of a first 3D image with a second 3D image;

associating the registered scanplanes into a composite array;

determining the change in volume of a left ventricle of a heart in the composite array.

4. A system for determining cardiac ejection fraction of a subject comprising:

an electrocardiograph in signal communication with the subject to determine the end-systole and end-diastole time points of the subject;

an ultrasound transceiver in signal communication with the electrocardiograph and positioned to acquire 3D images at the end-systole and the end-diastole time points determined by the electrocardiograph;

a computer system in communication with the transceiver, a computer system having a microprocessor and a memory, the memory further containing stored programming instructions operable by the microprocessor to associate the plurality of scanplanes of each array, and

the memory further containing instructions operable by the microprocessor to determine the change in volume of a left ventricle of a heart at the end systole and end diastole time points.

5. The system of claim 4, wherein change in volume is calculated as a percentage.

6. The system of claim 4, wherein the array includes rotational, wedge, and translation.

7. The system of claim 4, wherein stored programming instructions further include aligning scanplanes having overlapping regions from each location into a plurality of registered composite scanplanes.

8. The system of claim 7, wherein the stored programming instructions further include fusing the registered composite scanplanes cardiac regions of the scanplanes of each array.

9. The system of claim 8, wherein the stored programming instructions further include arranging the fused composite scanplanes into a composite array.

10. The system of claim 4, wherein a computer system is configured for remote operation via a local area network or an Internet web-based system, the internet web-based system having a plurality of programs that collect, analyze, determine and store cardiac ejection fraction measurements.