How to create .dcm file and save locally

[ctTushar]

`const fs = require('fs') const crypto = require('crypto') const path = require('path') const rnBridge = require('rn-bridge') const dcmjs = require('dcmjs')

const mapExamToDataset = require('../functions/mapExamToDataset') const datasetToFile = require('../functions/datasetToFile') const sendDicom = require('../functions/sendDicom') const { DIST_PATH } = require('../constants/paths')

module.exports = class UploadExamCommand { constructor(exam, serialNumber, appVersion, image, options) { this.exam = exam this.serialNumber = serialNumber this.appVersion = appVersion this.image = image this.options = options }

execute() { const { isMultiframe } = this.options

const fileName = UploadExamCommand.generateFileName()
const filePath = path.join(DIST_PATH, fileName)

if (!fs.existsSync(DIST_PATH)) {
  fs.mkdirSync(DIST_PATH)
}

if (fs.existsSync(path.join(DIST_PATH, fileName))) {
  fs.unlinkSync(path.join(DIST_PATH, fileName))
}
const dataset = mapExamToDataset(this.image, this.probeSerialNumber, this.appVersion, this.exam, {
  isMultiframe,
})

if (saveLocally) { // assume it is true for now

  const dicomData = dcmjs.data.DicomMessage.write(dataset)
  try {
    fs.writeFileSync(filePath, Buffer.from(dicomData))
  } catch (error) {
    console.error('Error writing DICOM file:', error)
  }
}

sendDicom(dataset, this.options)

}

static generateFileName() { return ${crypto.randomBytes(20).toString('hex')}.dcm } } below is the data set JSON { "transferSyntaxUid": "1.2.840.10008.1.2.1", "elements": { "PatientID": "2.16.840.1.114556.79494184422528272155.20241021131306.3.568743.1", "PatientName": "Unknown", "PatientBirthDate": "unknown", "PatientSex": "O", "ReferringPhysicianName": "unknown", "AccessionNumber": "unknown", "StudyDescription": "", "PerformingPhysicianName": "unknown", "StudyInstanceUID": "2.16.840.1.114556.79494184422528272155.20241021131306.3.568743.1", "StudyDate": "20241021", "StudyTime": "131306.6000", "StudyID": "f6012e30-5f0d-43bd-885c-eebeed7dea5f", "Modality": "US", "SeriesInstanceUID": "2.16.840.1.114556.1.1.1.20241021T07431.48fc8941a16aa4c3fe7de495d23062a8", "SeriesNumber": "1", "SeriesDate": "20241021", "SeriesTime": "131306", "Laterality": "", "Manufacturer": "COMPANY Inc", "ManufacturerModelName": "COMPANY Device", "InstitutionName": "COMPANYINC", "SoftwareVersions": "4.2.3.13", "DeviceSerialNumber": "0116-2318-0134-67C8C9", "StationName": "COMPANY", "InstanceNumber": "1", "PatientOrientation": "", "ContentDate": "20241021", "ContentTime": "131306", "ImageType": "ORIGINAL\PRIMARY", "AcquisitionDate": "20241021", "AcquisitionTime": "131306", "AcquisitionDateTime": "20241021131306", "PlanarConfiguration": 0, "UltrasoundColorDataPresent": 1, "SamplesPerPixel": 3, "PhotometricInterpretation": "RGB", "PixelRepresentation": 0, "Rows": 2051, "Columns": 1080, "BitsAllocated": 8, "BitsStored": 8, "HighBit": 7, "PixelAspectRatio": "1\1", "LossyImageCompression": "00", "FocusDepth": "2", "SOPInstanceUID": "2.16.840.1.114556.1.1.1.20241025T07532.f0e005e185fc532e5634febaa4cf9303", "SOPClassUID": "1.2.840.10008.5.1.4.1.1.6.1", "MediaStorageSOPClassUID": "1.2.840.10008.5.1.4.1.1.6.1", "MediaStorageSOPInstanceUID": "2.16.840.1.114556.1.1.1.20241025T07532.f0e005e185fc532e5634febaa4cf9303", "SequenceOfUltrasoundRegions": [ { "RegionSpatialFormat": 1, "RegionDataType": 1, "RegionFlags": 3, "RegionLocationMinX0": 0, "RegionLocationMinY0": 0, "RegionLocationMaxX1": 1080, "RegionLocationMaxY1": 2051, "ReferencePixelX0": 540, "ReferencePixelY0": 0, "PhysicalUnitsXDirection": 3, "PhysicalUnitsYDirection": 3, "ReferencePixelPhysicalValueX": 0, "ReferencePixelPhysicalValueY": 0, "PhysicalDeltaX": 0.0076103500761035, "PhysicalDeltaY": 0 } ], "OperatorsName": "COMPANY", "SpecificCharacterSet": "ISO_IR 100", "PixelSpacing": "0.183406\0.183406", "PrivateCreator": "ABC_PRIVATE", "PixelData": [{}], "defaultOptions": { "TransferSyntaxUid": "1.2.840.10008.1.2.1", "isMultiframe": false, "PhotometricInterpretation": "RGB", "SamplesPerPixel": 3, "BitsAllocated": 8, "BitsStored": 8, "HighBit": 7 } } } `

[PantelisGeorgiadis]

Hello @ctTushar, Thank you for your question. If I am not mistaken, the above code snippet doesn't involve the use of dcmjs-dimse. Is that accurate?

[ctTushar]

@PantelisGeorgiadis currently i am trying with dcmjs, do we have same for dcmjs-dimse ? or do you have any documentation/source or link which can guide me. Thanks

[PantelisGeorgiadis]

Hello @ctTushar, Given a collection of elements, as the one you posted above, you can check how dcmjs-dimse is saving them in a DICOM part10 file, by following the Dataset's toFile function: https://github.com/PantelisGeorgiadis/dcmjs-dimse/blob/a98654b05386bb5c2120437969098b09f55cc0a5/src/Dataset.js#L177

[ctTushar]

Working thanks.

dataset.toFile(filePath, (err, data) => { if (err) { console.error('Error saving DICOM file:', err) } else { console.log('DICOM file saved successfully:', filePath, JSON.stringify(data)) } })

[ctTushar]

You can close this ticket. Thanks.

I have 1 more question. It regarding dicom in some PACS server the cine.dcm file are stored with green color overlay. Any idea what could cause the issue.

Below is the output

below is the output what is expected

[PantelisGeorgiadis]

Thank you @ctTushar! Do you mind anonymizing and sharing the cine.dcm file?

[ctTushar]

Let me anonymize it and give it to, in sometime.

[ctTushar]

@PantelisGeorgiadis here is cine.dcm sample file in zip folder

Cine file.zip

[PantelisGeorgiadis]

Thanks for sending your file @ctTushar. The image is encoded fine, it seems that it is your viewer's fault to present it greenish. Just drag and drop your file here: https://unpkg.com/dcmjs-imaging/build/index.html to verify.

[ctTushar]

On provide link you share it is rendering properly and our own created ORTHANC server too it is working fine. On client server it is creating issue.

[ctTushar]

if i change one tag i.e PhotometricInterpretation: 'RGB', to other value i.e 'Monochrome2' or 'YBR_FULL' on client server it color change to pink. Not sure is it our problem in code or while generating code, or it server configuration issue or what else, we have no idea.

[PantelisGeorgiadis]

It is not a problem of the networking code but rather one in your client's rendering code.

[ctTushar]

Our client has raised a concern regarding the mobile application. When sending DICOM files to PACS using C-Store from an Android device, it works fine. However, when performing the same operation from an iPhone, only a green color appears. This issue occurs specifically with Cine files, while images work fine on both platforms.

I download the file from client server and share it here, once i get it.

[ctTushar]

i upload same cine.dcm file on client server this is the output. Any feedback on this ?. Thanks

[PantelisGeorgiadis]

Typically, that's a colorspace conversion problem. Most often you can find this issue in ultrasounds with JPEG Baseline syntax in which, during decompression, the proper YBR to RGB conversion is not performed.

[ctTushar]

@PantelisGeorgiadis i was able to fix the colour issue when we upload image from iOS, The issue in iOS was if you notice there in snap provide the top and bottom colour is set to some other i.e white, So we explicitly added background colour to black which resolve the issue. But some how to android device it is automatically picking up black but not for iOS platform.

[ctTushar]

you can now close the ticket. Thanks for you help.

[PantelisGeorgiadis]

Can't say that I did much for you @ctTushar but it was my pleasure!