Available in LEADTOOLS Medical Imaging toolkits. |
#include "Ltdic.h"
L_UINT32 LDicomWaveformChannel::SetChannelSamples8(pSamples, uCount)
L_UCHAR* pSamples; |
/* pointer to the input buffer*/ |
L_UINT32 uCount; |
/* size of the input buffer*/ |
Sets 8-bit data for a channel.
Parameter |
Description |
pSamples |
Pointer to the buffer that holds the new channel samples. |
uCount |
Size of the buffer pointed to by pSamples. |
Returns
The actual number of samples set for the channel.
Comments
This function sets the new samples for a channel. Before calling the LDicomWaveformChannel::SetChannelSamples8 function, be sure to call LDicomWaveformGroup::SetSampleInterpretation to set the waveform sample interpretation.
The number of samples actually set will be less than or equal to the "Number of samples per channel" (003A, 0010) in the multiplex group that represents the parent of this channel. To get that number, call the LDicomWaveformGroup::GetNumberOfSamplesPerChannel function.
This function is intended to be used for setting the data of 8-bit channels where the "Waveform Sample Interpretation" (5400,1006) is signed 8-bit linear (DICOM_SAMPLE_INTERPRETATION_SB), unsigned 8-bit linear (DICOM_SAMPLE_INTERPRETATION_UB), 8-bit mu-law (DICOM_SAMPLE_INTERPRETATION_MB) or 8-bit A-law (DICOM_SAMPLE_INTERPRETATION_AB). To get the waveform sample interpretation, use the LDicomWaveformGroup::GetSampleInterpretation function.
Required DLLs and Libraries
LTDIC For a listing of the exact DLLs and Libraries needed, based on the toolkit version, refer to Files To Be Included With Your Application |
Win32, x64
See Also
Example
/******************************************************************/ /* This is a comprehensive sample, which shows how to insert a */ /* waveform group with one ECG channel into a dataset. */ /* The main function is InsertECGCWaveform ,and the rest of the */ /* functions are helping functions. */ /******************************************************************/ // Function prototypes BOOL SetChannelSourceAndSensitivity(LDicomWaveformChannel* pECGChannel); BOOL SetChannelAnnotations(LDicomWaveformChannel* pECGChannel); BOOL InsertECGCChannel( LDicomWaveformGroup* pECGWaveformGroup, L_INT16* pSamples, L_UINT32 uSampleCount); // The main function that creates the // waveform group and adds to the dataset L_INT LDicomWaveformChannel_SetChannelSamples8Example(LDicomDS &InputDS, L_INT16* pSamples, L_UINT32 uSampleCount) { L_INT nRet; // Sanity check if(!pSamples || (uSampleCount == 0) ) { return -1; } // Our new waveform group LDicomWaveformGroup ECGWaveformGroup; // Reset the waveform group, we don't // really need to call this! ECGWaveformGroup.Reset(); // Set the number of samples per channel. You can call // LDicomWaveformGroup::GetNumberOfSamplesPerChannel to get // the number of samples if(!ECGWaveformGroup.SetNumberOfSamplesPerChannel(uSampleCount)) { return -1; } // Set the sampling frequency. You can call // LDicomWaveformGroup::GetSamplingFrequency to // get the sampling frequency ECGWaveformGroup.SetSamplingFrequency(240.00); // Set sample interpretation if(!ECGWaveformGroup.SetSampleInterpretation(DICOM_SAMPLE_INTERPRETATION_SS)) { return -1; } // Just in case! if(ECGWaveformGroup.GetSampleInterpretation() != DICOM_SAMPLE_INTERPRETATION_SS) { return -1; } // No Multiplex Group Time Offset // You can call LDicomWaveformGroup::GetMultiplexGroupTimeOffset // to get the time offset if(!ECGWaveformGroup.SetMultiplexGroupTimeOffset(FALSE, 0.0)) { return -1; } // No Trigger Time Offset // You can call LDicomWaveformGroup::GetTriggerTimeOffset // to get the trigger time offset if(!ECGWaveformGroup.SetTriggerTimeOffset(FALSE, 0.0)) { return -1; } // No Trigger Sample Position // You can call LDicomWaveformGroup::GetTriggerSamplePosition // to get the trigger sample position if(!ECGWaveformGroup.SetTriggerSamplePosition(FALSE, 0)) { return -1; } // Waveform originality is original ECGWaveformGroup.SetWaveformOriginality(DICOM_WAVEFORM_ORIGINALITY_ORIGINAL); // Just in case if(ECGWaveformGroup.GetWaveformOriginality() != DICOM_WAVEFORM_ORIGINALITY_ORIGINAL) { return -1; } // Set the multiplex group label if(!ECGWaveformGroup.SetMultiplexGroupLabel(TEXT("SCPECG Waveform"))) { return -1; } if(ECGWaveformGroup.GetMultiplexGroupLabel() == NULL) { return -1; } // Set the Waveform padding value // You can call LDicomWaveformGroup::GetWaveformPaddingValue // to get the waveform padding value if(!ECGWaveformGroup.SetWaveformPaddingValue(TRUE,32768)) { return -1; } if (!InsertECGCChannel(&ECGWaveformGroup , pSamples, uSampleCount)) { return -1; } // Delete any waveform groups that already exist in the dataset L_UINT32 uWaveformGroupCount = InputDS.GetWaveformGroupCount(); for(L_UINT32 uIndex = 0 ; uIndex < uWaveformGroupCount ; uIndex++) { nRet = InputDS.DeleteWaveformGroup(uIndex,0); if(nRet != DICOM_SUCCESS) return nRet; } // Insert the new waveform group into the dataset nRet = InputDS.AddWaveformGroup(&ECGWaveformGroup, 0, ELEMENT_INDEX_MAX); if(nRet != DICOM_SUCCESS) return nRet; return DICOM_SUCCESS; } // Add an ECG channel to the group BOOL InsertECGCChannel (LDicomWaveformGroup* pECGWaveformGroup, L_INT16* pSamples, L_UINT32 uSampleCount) { LDicomWaveformChannel* pECGChannel= NULL; L_UINT32 uNumberOfSamples =0; L_INT32 nChannelNumber = -1; L_INT32 nMinValue = 0; L_INT32 nMaxValue = 0; if(pECGWaveformGroup == NULL) { return FALSE; } // Add a channel to the group pECGChannel = pECGWaveformGroup->AddChannel(/*ELEMENT_INDEX_MAX*/); if(pECGChannel == NULL) { return FALSE; } // If we want to update a channel, we can first call // LDicomWaveformGroup::DeleteChannel and then call // LDicomWaveformGroup::AddChannel with the same // index we passed to DeleteChannel // Make sure that the channel really got added // This is for the purposes of this sample only, because // the check we did in the previous statement is enough if( (pECGWaveformGroup->GetNumberOfChannels() !=1)|| (pECGWaveformGroup->GetChannel(0) ==NULL) ) { return FALSE; } // Sanity checks! if((pECGChannel->GetWaveformGroup() != pECGWaveformGroup)|| (pECGChannel->GetIndex() != 0)) { return FALSE; } /* Set the channel samples The data we are setting in here is 16 bit data. We would call SetChannelSamples8 if the data were 8 bit. We can also call SetChannelSamples32, which will set the data as either 8-bit or 16-bit depending on the sample interpretation */ if(pECGChannel->SetChannelSamples16(pSamples, uSampleCount)!=uSampleCount) { return FALSE; } // Just in case if((!pECGChannel->GetChannelSamples(&uNumberOfSamples))|| (uNumberOfSamples == 0)) { return FALSE; } // Set the channel source and sensitivity if(!SetChannelSourceAndSensitivity(pECGChannel)) { return FALSE; } // Set the channel status pECGChannel->SetChannelStatus(DICOM_CHANNEL_STATUS_OK); if(pECGChannel->GetChannelStatus()!=DICOM_CHANNEL_STATUS_OK) { return FALSE; } // Set the channel time skew. You can call // LDicomWaveformChannel::GetChannelTimeSkew to get the time skew // You can also call LDicomWaveformChannel::SetChannelSampleSkew // And LDicomWaveformChannel::GetChannelSampleSkew to set and get // the channel samples skew pECGChannel->SetChannelTimeSkew(0.000000); // Set the waveform channel number if(!pECGChannel->SetWaveformChannelNumber(TRUE, 0)) { return FALSE; } if((!pECGChannel->GetWaveformChannelNumber(&nChannelNumber))|| (nChannelNumber !=0)) { return FALSE; } // Set the channel label if(!pECGChannel->SetChannelLabel(TEXT("First Channel"))) { return FALSE; } if(!pECGChannel->GetChannelLabel()) { return FALSE; } // No channel offset // You can also call LDicomWaveformChannel::GetChannelOffset // To get the channel offset if(!pECGChannel->SetChannelOffset(FALSE, 0.0)) { return FALSE; } // Set filter low frequency // You can also call LDicomWaveformChannel::GetFilterLowFrequency // To get the filter low frequency if(!pECGChannel->SetFilterLowFrequency(TRUE, 0.050)) { return FALSE; } // Set filter high frequency // You can also call LDicomWaveformChannel::GetFilterHighFrequency // To get the filter high frequency if(!pECGChannel->SetFilterHighFrequency(TRUE, 100.00)) { return FALSE; } // Set the channel minimum value if(!pECGChannel->SetChannelMinimumValue(TRUE, -386)) { return FALSE; } // Set the channel maximum value if(!pECGChannel->SetChannelMaximumValue(TRUE, 1264)) { return FALSE; } // Just in case if((!pECGChannel->GetChannelMinimumValue(&nMinValue))|| (nMinValue !=-386)) { return FALSE; } // Just in case if((!pECGChannel->GetChannelMaximumValue(&nMaxValue))|| (nMaxValue !=1264)) { return FALSE; } /* You can also call the following functions to set and get the notch filter frequency and bandwidth LDicomWaveformChannel::SetNotchFilterFrequency LDicomWaveformChannel::GetNotchFilterFrequency LDicomWaveformChannel::SetNotchFilterBandwidth LDicomWaveformChannel::GetNotchFilterBandwidth */ // Last, but not least, set the channel annotations! return SetChannelAnnotations(pECGChannel); } //Set the channel source and sensitivity BOOL SetChannelSourceAndSensitivity(LDicomWaveformChannel* pECGChannel) { // Let's use the DICOM context group tables! ///////////////////////Channel Source///////////////////////// // Load the ECG Leads table LDicomContextGroup::Load(CID_3001); pDICOMCONTEXTGROUP pECGLeadsGroup = LDicomContextGroup::Find(CID_3001); if(pECGLeadsGroup) { // 5.6.3-9-1 is Lead I (Einthoven) pDICOMCODEDCONCEPT pCodedConcept = LDicomContextGroup::FindCodedConcept(pECGLeadsGroup, TEXT("SCPECG"), TEXT("5.6.3-9-1")); if(pCodedConcept) { DICOMCODESEQUENCEITEM DicomSourceSequenceItem; L_UINT16 uRet; memset(&DicomSourceSequenceItem , 0 , sizeof(DICOMCODESEQUENCEITEM)); DicomSourceSequenceItem.uStructSize = sizeof(DICOMCODESEQUENCEITEM); DicomSourceSequenceItem.pszCodeValue = pCodedConcept->pszCodeValue ; DicomSourceSequenceItem.pszCodingSchemeDesignator = pCodedConcept->pszCodingSchemeDesignator ; DicomSourceSequenceItem.pszCodingSchemeVersion = pCodedConcept->pszCodingSchemeVersion ; DicomSourceSequenceItem.pszCodeMeaning = pCodedConcept->pszCodeMeaning ; // Set the channel source uRet = pECGChannel->SetChannelSource(&DicomSourceSequenceItem); if(uRet!= DICOM_SUCCESS) { return FALSE; } // You can call LDicomWaveformChannel::GetChannelSource () // to get the channel source } else { return FALSE; } } else { return FALSE; } ///////////////////////Channel Sensitivity//////////////////////// // Cardiology Units of Measurement LDicomContextGroup::Load(CID_3082); pDICOMCONTEXTGROUP pCardiologyUnitsGroup = LDicomContextGroup::Find(CID_3082); if(pCardiologyUnitsGroup) { pDICOMCODEDCONCEPT pCodedConcept = LDicomContextGroup::FindCodedConcept(pCardiologyUnitsGroup, TEXT("UCUM"), TEXT("mV")); if(pCodedConcept) { DICOMCODESEQUENCEITEM DicomSourceSequenceItem; L_UINT16 uRet; memset(&DicomSourceSequenceItem , 0 , sizeof(DICOMCODESEQUENCEITEM)); DicomSourceSequenceItem.uStructSize = sizeof(DICOMCODESEQUENCEITEM); DicomSourceSequenceItem.pszCodeValue = pCodedConcept->pszCodeValue ; DicomSourceSequenceItem.pszCodingSchemeDesignator = pCodedConcept->pszCodingSchemeDesignator ; DicomSourceSequenceItem.pszCodingSchemeVersion = pCodedConcept->pszCodingSchemeVersion ; DicomSourceSequenceItem.pszCodeMeaning = pCodedConcept->pszCodeMeaning ; // Set the channel sensitivity uRet = pECGChannel->SetChannelSensitivity(TRUE, 0.001220, &DicomSourceSequenceItem); if(uRet != DICOM_SUCCESS) { return FALSE; } // You can call LDicomWaveformChannel::GetChannelSensitivity() // to get the channel sensitivity } else { return FALSE; } } else { return FALSE; } return TRUE; } // Add annotations for the channel BOOL SetChannelAnnotations(LDicomWaveformChannel* pECGChannel) { // Delete any existing channel annotations for(L_UINT32 uIndex = 0 ; uIndex < pECGChannel->GetAnnotationCount();uIndex++) { if(pECGChannel->GetAnnotation(uIndex)) { pECGChannel->DeleteAnnotation(uIndex); } } DICOMWAVEFORMANNOTATION ECGWaveformAnnotation; memset(&ECGWaveformAnnotation,0, sizeof(DICOMWAVEFORMANNOTATION)); ECGWaveformAnnotation.uStructSize = sizeof(DICOMWAVEFORMANNOTATION); // Over here we are populating the DICOMCODESEQUENCEITEM structure // directly. What we can also do is fill it with values from // the LDicomContextGroup table which lists all the context // group tables defined by the DICOM standard. You can look at // the SetChannelSourceAndSensitivity above for an Example on // how to do that // DICOMCODESEQUENCEITEM CodedName; memset(&CodedName,0, sizeof(DICOMCODESEQUENCEITEM)); CodedName.uStructSize = sizeof(DICOMCODESEQUENCEITEM); CodedName.pszCodeValue = TEXT("8867-4"); CodedName.pszCodeMeaning = TEXT("Heart rate"); CodedName.pszCodingSchemeDesignator = TEXT("LN"); CodedName.pszCodingSchemeVersion = TEXT("19971101"); ECGWaveformAnnotation.pCodedName = &CodedName; DICOMCODESEQUENCEITEM MeasurementUnits; memset(&MeasurementUnits,0, sizeof(DICOMCODESEQUENCEITEM)); MeasurementUnits.uStructSize = sizeof(DICOMCODESEQUENCEITEM); MeasurementUnits.pszCodeValue = TEXT("{H.B.}/min"); MeasurementUnits.pszCodeMeaning = TEXT("Heart beat per minute"); MeasurementUnits.pszCodingSchemeDesignator = TEXT("UCUM"); MeasurementUnits.pszCodingSchemeVersion = TEXT("1.4"); ECGWaveformAnnotation.pMeasurementUnits = &MeasurementUnits; L_DOUBLE dNumericValue = 69.00; ECGWaveformAnnotation.pNumericValue = &dNumericValue ; ECGWaveformAnnotation.uNumericValueCount = 1; if(pECGChannel->AddAnnotation(&ECGWaveformAnnotation) != DICOM_SUCCESS) { return FALSE; } return TRUE; }