How to write a DICOM file from raw ecg data

Question

I have raw ecg voltage samples in csv format, for example:

time    voltage (mV)
0.000   9.169110459
0.001   9.144672532
0.002   9.144672532
0.003   9.169110459
0.004   9.169110459
0.005   9.169110459
0.006   9.169110459
0.007   9.144672532
0.008   9.217986315
0.009   9.169110459
0.01    9.169110459
0.011   9.169110459
0.012   9.169110459
0.013   9.144672532
0.014   9.144672532
0.015   9.169110459
0.016   9.169110459
0.017   9.169110459
0.018   9.169110459
0.019   9.169110459
0.02    9.169110459
0.021   9.169110459
0.022   9.144672532
0.023   9.169110459

and would like to convert it to a DICOM file so that I can view it in an ecg viewer like ECG toolkit for C #: https://sourceforge.net/projects/ecgtoolkit-cs/

How do I go about this transformation? I did some search queries but did not find a tool that is able to write dicom files from raw data.

EDIT:

I ended up working with the SCP file as it was easier. I created the library above to create a scp file. Code below:

using System;
using System.Linq;
using ECGConversion;
using ECGConversion.ECGDemographics;
using ECGConversion.ECGSignals;

namespace SCPWriter
{
    public static class CreateScpEcg
    {
        public static void CreateScpEcgFile(double[] voltages, int sampleRate, string directory, string patientId)
        {
            var rhythm = voltages;

            var filePath = directory + patientId;

            // get an empty ECG format file
            IECGFormat format = ECGConverter.Instance.getFormat("SCP-ECG");
            if (format != null)
            {
                // five required actions for the demographic info.
                format.Demographics.Init();
                format.Demographics.PatientID = patientId;
                format.Demographics.LastName = "";
                format.Demographics.TimeAcquisition = DateTime.Now;
                // make an AcquiringDeviceID object
                AcquiringDeviceID acqID = new AcquiringDeviceID(true);

                // can also specify your own acquiring device info
                Communication.IO.Tools.BytesTool.writeString("MYDEVI", acqID.ModelDescription, 0, acqID.ModelDescription.Length);
                // set the Acquiring Device ID (required)
                format.Demographics.AcqMachineID = acqID;
                // declare the signal part.
                var leadType = new LeadType[] { LeadType.I };
                var rhythmAVM = 1;
                var rhythmSPS = sampleRate;
                Signals sigs = new Signals((byte)leadType.Length);
                sigs.RhythmAVM = rhythmAVM;
                sigs.RhythmSamplesPerSecond = rhythmSPS;

                for (int i = 0; i < sigs.NrLeads; i++)
                {
                    // very important to assign signal.

                    sigs[i] = new Signal();
                    sigs[i].Type = leadType[i];
                    sigs[i].Rhythm = rhythm.Select(Convert.ToInt16).ToArray();
                    sigs[i].RhythmStart = 0;
                    sigs[i].RhythmEnd = rhythm.Length - 1;
                }
                // store signal to the format.
                if (format.Signals.setSignals(sigs) != 0)
                {
                    Console.Error.WriteLine("setSignals failed!");
                    return;
                }
                // write the file
                var outputFile = filePath + ".scp";


                ECGWriter.Write(format, outputFile, true);
                if (ECGWriter.getLastError() != 0)
                {
                    Console.Error.WriteLine("Writing failed: {0}!", ECGWriter.getLastErrorMessage());
                    return;
                }
            }
        }


    }
}

NB: I was only interested in "lead I", but you can add more lines to this line: var leadType = new LeadType [] {LeadType.I}

NB: , sourceforge .

Answer 1

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