Dynamic coronary roadmapping
First Claim
1. Method for producing a dynamic coronary artery system roadmap of a patient comprising the steps of:
- recording and storing a dynamic visual image of a beating heart for a cardiac cycle so as to create a mask sequence;
injecting a visual contrast medium into the coronary artery system of the patient;
recording and storing a corresponding dynamic visual image of the beating heart for another cardiac cycle after injecting the contrast medium so as to create a contrast sequence; and
subtracting the corresponding contrast sequence from the mask sequence in order to produce the roadmap sequence of the coronary artery system.
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Accused Products
Abstract
A dynamic coronary roadmap of the coronary artery system is produced by recording and storing a visual image of the heart creating a mask sequence, recording and storing another dynamic visual image of the heart after injection of a contrast medium thereby creating a contrast sequence, matching the different durations of two sequences and subtracting the contrast sequence from the mask sequence producing a roadmap sequence. The roadmap sequence is then replayed and added to live fluoroscopic images of the beating heart. Replay of the roadmap sequence is triggered by receipt of an ECG R-wave. The result is a dynamically moving coronary roadmap image which moves in precise synchronization with the live incoming fluoroscopic image of the beating heart.
102 Citations
13 Claims
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1. Method for producing a dynamic coronary artery system roadmap of a patient comprising the steps of:
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recording and storing a dynamic visual image of a beating heart for a cardiac cycle so as to create a mask sequence; injecting a visual contrast medium into the coronary artery system of the patient; recording and storing a corresponding dynamic visual image of the beating heart for another cardiac cycle after injecting the contrast medium so as to create a contrast sequence; and subtracting the corresponding contrast sequence from the mask sequence in order to produce the roadmap sequence of the coronary artery system. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. Method for producing a dynamic coronary artery system roadmap of a patient comprising the steps of:
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recording and storing a dynamic visual image of a beating heart for a substantially full cardiac cycle so as to create a mask sequence; injecting a visual contrast medium into the coronary artery system of the patient; recording and storing another dynamic visual image of the beating heart for a substantially full cardiac cycle after injecting the contrast medium so as to create a contrast sequence; and producing a substantially full contrast roadmap sequence. - View Dependent Claims (9)
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10. A method of displaying a representation of a dynamically beating coronary arterial system to assist in coronary angioplasty, comprising the steps of:
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recording and storing dynamic visual images of a beating heart thereby creating a mask sequence of a complete cardiac cycle; injecting a visual contrast medium into the patient; recording and storing dynamic visual images of the beating heart after injecting the contrast medium thereby creating a contrast sequence of a complete cardiac cycle; subtracting the contrast sequence from the mask sequence so as to create a preliminary roadmap sequence; producing a substantially full contrast roadmap sequence from the preliminary roadmap sequence; adding the full contrast roadmap sequence to a live dynamic visual image of the beating heart to produce an image of the roadmap overlaid on the image of the heart that moves in substantial synchronization with the beating heart thereby allowing an angiographer to accurately visualize the placement of a dilation balloon throughout the complete cardiac cycle. - View Dependent Claims (11, 12)
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13. Apparatus for producing a dynamic coronary artery system roadmap of a patient including:
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means for recording and storing a dynamic visual image of a beating heart for a cardiac cycle so as to create a mask sequence; means for recording and storing a corresponding dynamic visual image of the beating heart for another cardiac cycle after injecting a contrast medium so as to create a contrast sequence; means for matching sequences of different length by time stretching; means for subtracting said corresponding contrast sequence from said mask sequence producing the roadmap sequence; and means for producing a substantially full contrast sequence by binary discrimination.
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Specification