Method and system for converting paper ECG printouts to digital ECG files
First Claim
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1. A method for digitizing a two-dimensional ECG chart, comprising:
- scanning the ECG chart, said ECG chart including an ECG wave, the ECG wave appearing on a background grid, the grid having generally horizontal and generally vertical grid lines;
detecting the background grid;
determining the number of pixels between grid lines; and
scaling a vertical axis of the scanned ECG chart in units of volts per pixel and scaling a horizontal axis of the scanned ECG chart in units of time per pixel.
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Abstract
A method for digitizing a two-dimensional ECG chart includes scanning the ECG chart. The ECG chart includes an ECG waveform that appears on a background grid having generally horizontal and generally vertical grid lines. The background grid is detected, and the number of pixels between grid lines is determined. The vertical axis of the scanned ECG chart is scaled in units of volts per pixel and the horizontal axis of the scanned ECG chart is scaled in units of time per pixel.
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21 Claims
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1. A method for digitizing a two-dimensional ECG chart, comprising:
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scanning the ECG chart, said ECG chart including an ECG wave, the ECG wave appearing on a background grid, the grid having generally horizontal and generally vertical grid lines;
detecting the background grid;
determining the number of pixels between grid lines; and
scaling a vertical axis of the scanned ECG chart in units of volts per pixel and scaling a horizontal axis of the scanned ECG chart in units of time per pixel. - View Dependent Claims (2, 3, 4, 5)
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6. A computerized method of deriving a digital ECG waveform from a computer readable-file representing an optically-scanned ECG chart, said method comprising the processes of:
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opening the computer readable-file representing the ECG chart;
displaying an image of the ECG chart;
selecting a portion of the displayed image of the ECG chart;
characterizing the displayed image;
detecting a plurality of grid lines appearing on the displayed image and being generally oriented in the horizontal and vertical directions; and
extracting and digitizing the ECG waveform appearing on the displayed image. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A system for deriving a digital ECG waveform, comprising:
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a computer having a display, at least one storage device, memory, and at least one input device; and
application software executable by said computer and being at least one of accessible to said computer and stored in said storage device or said memory of said computer, said application software configured for deriving a digital ECG waveform based upon an optically-scanned ECG chart. - View Dependent Claims (21)
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Specification