Method and a computer program for determining a functional property of a moving object

• US 8,805,479 B2
• Filed: 02/07/2008
• Issued: 08/12/2014
• Est. Priority Date: 02/14/2007
• Status: Active Grant

• Current Assignee: Koninklijke Philips N.V., The General Hospital Corporation (Mass General Brigham, Inc.)
• Original Assignee: Koninklijke Philips N.V., The General Hospital Corporation (Mass General Brigham, Inc.)
• Inventors: Manzke, Robert, Chan, Raymond, Reddy, Vivek, D'avila, Andre Luiz Buchele
• Primary Examiner(s): Jung, Unsu
• Assistant Examiner(s): Santos Rodriguez, Joseph M
• Application Number:
  US12/526,048
• Publication Number:
  US 20100094128A1
• Time in Patent Office: 2,378 Days
• Field of Search: None
• US Class Current: 600/427
• CPC Class Codes: A61B 5/06 Devices, other than using radiation, for detecting or locating foreign bodies for removing same A61B17/50 ; determining position of probes within or on the body of the patient
• CPC Class Codes: A61B 5/1107 Measuring contraction of parts of the body, e.g. organ, muscle apparatus for measuring work or force in general G01L
• CPC Class Codes: A61B 6/12 Arrangements for detecting or locating foreign bodies
• CPC Class Codes: A61N 1/36514 controlled by a physiological quantity other than heart potential, e.g. blood pressure controlled by two or more physical parameters A61N1/36585
• CPC Class Codes: A61N 1/36578 controlled by mechanical motion of the heart wall, e.g. measured by an accelerometer or microphone
• CPC Class Codes: A61N 1/368 comprising more than one electrode co-operating with different heart regions A61N1/3622, A61N1/3627 take precedence
• CPC Class Codes: A61N 1/3684 for stimulating the heart at multiple sites of the ventricle or the atrium

Abstract

A system for determining a functional property of a moving object includes a tag contactable to the object such that the tag follows the movement of the object. The system further includes a movement determination device configured to determine the movement of the tag. The system also includes a functional property determination device configured to determine a functional property of the object from the determined movement of the tag.

Claims

1. A system for determining a functional property of a moving object without direct imaging of the moving object itself, the system comprising:

a tag configured to be in direct contact with the moving object such that the tag follows movement of the moving object, wherein the moving object is the heart of a subject;

an imager configured to provide images of the tag;

a movement determination device configured to determine movement of the tag based on the images of the tag; and

a functional property determination device configured to determine the functional property of the moving object from the determined movement of the tag, wherein the functional property is a degree of synchrony between cardiac chambers of the heart or a cardiac output,

wherein the tag comprises an electrode configured to influence the movement of the moving object by electrically pacing the heart, wherein the electrode is changeable at least between a first influencing condition and a second influencing condition, wherein the movement determination device and the electrode are controllable such that a first movement of the tag is determined when the electrode is in the first influencing condition and that a second movement of the tag is determined when the electrode is in the second influencing condition, and wherein the functional property determination device is controllable such that the functional property is determined at least twice, one time from the first movement of the tag and another time from the second movement of the tag, in order to determine the influence of the electrode on the functional property of the moving object.

2. The system as defined in claim 1, wherein the functional property determination device is further configured to determine a movement of the moving object from the determined movement of the tag and to determine the functional property of the moving object from the determined movement of the moving object.

3. The system as defined in claim 1, wherein the moving object comprises a first object within a second object, wherein the tag is configured to be insertable into the second object such that the tag is configured to contact the first object such that the tag follows the movement of the first object.

4. The system as defined in claim 3, wherein at least one first tag is configured to be in contact with the right chamber of the heart, wherein at least one second tag is configured to be in contact with the left chamber of the heart, wherein the movement determination device is further configured to determine a movement of the at least one first tag and of the at least one second tag.

5. The system as defined in claim 4, wherein the functional property determination device is further configured to determine a degree of synchrony between the movement of the right chamber and the left chamber of the heart from the determined movement of the at least one first tag and the at least one second tag.

6. The system as defined in claim 4, wherein the functional property determination device is further configured to determine a cardiac output from the determined movement of the at least one first tag and the at least one second tag.

7. The system as defined in claim 1, further comprising a controller configured to adapt the movement influencing element such that the determined functional property of the moving object is maximized.

8. The system as defined in claim 1, wherein the controller is further configured to position the movement influencing element such that the determined functional property of the moving object is maximized.

9. The system as defined in claim 1, further comprising a monitor configured to visualize the determined functional property of the moving object simultaneously with a visualization of the tag.

10. A method for determining a functional property of a moving object without direct imaging of the moving object itself, the method comprising the acts of:

providing a tag contacted to the moving object, wherein the moving object is the heart of a subject, such that the tag follows movement of the moving object, wherein the tag comprises an electrode configured to influence the movement of the moving object by electrically pacing the heart of the subject, and wherein the electrode is changeable at least between a first influencing condition and a second influencing condition;

obtaining images of the tag using an imager;

determining by a movement determination device movement of the tag based on the images of the tag;

determining by a functional property determination device the functional property of the moving object from the determined movement of the tag, wherein the functional property is a degree of synchrony between cardiac chambers of the heart or a cardiac output;

controlling the movement determination device and the electrode such that a first movement of the tag is determined when the electrode is in the first influencing condition and that a second movement of the tag is determined when the electrode is in the second influencing condition; and

controlling the functional property determination device such that the functional property is determined at least twice, one time from the first movement of the tag and another time from the second movement of the tag, in order to determine the influence of the electrode on the functional property of the moving object.

11. A non-transitory computer readable medium comprising computer instructions which, when executed by a processor, configure the processor to determine a functional property of a moving object without direct imaging of the moving object itself by performing the acts of:

providing a tag contacted to the moving object, wherein the moving object is the heart of a subject, such that the tag follows movement of the moving object, wherein the tag comprises an electrode configured to influence the movement of the moving object by electrically pacing the heart of the subject, and wherein the electrode is changeable at least between a first influencing condition and a second influencing condition;

obtaining images of the tag using an imager;

determining by a movement determination device movement of the tag based on the images of the tag; and

determining by a functional property determination device a functional property of the moving object from the determined movement of the tag, wherein the functional property is a degree of synchrony between cardiac chambers of the heart or a cardiac output;

controlling the movement determination device and the electrode such that a first movement of the tag is determined when the electrode is in the first influencing condition and that a second movement of the tag is determined when the electrode is in the second influencing condition; and

controlling the functional property determination device such that the functional property is determined at least twice, one time from the first movement of the tag and another time from the second movement of the tag, in order to determine the influence of the electrode on the functional property of the moving object.