RequestedImageUpdated Event

Summary
Occurs when a new image requested for display in the Leadtools.MedicalViewer.MedicalViewer is loaded and initialized.
Syntax
C#
C++/CLI
public event EventHandler<RequestedImageUpdatedEventArgs> RequestedImageUpdated 
public: 
event EventHandler<RequestedImageUpdatedEventArgs^>^ RequestedImageUpdated 
Event Data

The event handler receives an argument of type RequestedImageUpdatedEventArgs containing data related to this event. The following RequestedImageUpdatedEventArgs properties provide information specific to this event.

PropertyDescription
Cell Gets the cell into which the image is inserted.
InstanceInformation Gets or sets the DICOM instance information about the image
SubCellIndex Gets the sub cell index for the requested image.
Remarks

This event is raised each time after the Leadtools.MedicalViewer.MedicalViewer control requests an image for display and the image has been sent to the control.

Example
C#
using LeadtoolsExamples.Common; 
using Leadtools; 
using Leadtools.Codecs; 
using Leadtools.Dicom; 
using Leadtools.MedicalViewer; 
using Leadtools.Dicom.Scu.Common; 
using Leadtools.ImageProcessing; 
using Leadtools.Dicom.AddIn.Common; 
using Leadtools.Dicom.Scu; 
using Leadtools.Medical.Workstation.Client; 
using Leadtools.Medical.Workstation.Client.Pacs; 
using Leadtools.Medical.Workstation.Loader; 
 
 
MedicalViewer viewer = new MedicalViewer(); 
public void LoadSeries() 
{ 
   Leadtools.Examples.Support.SetLicense(); 
 
   AeInfo clientInfo = new AeInfo(); 
 
   clientInfo.Address = Dns.GetHostName(); 
   clientInfo.Port = 1000; 
   clientInfo.AETitle = "TEST_CLIENT"; 
 
   DicomScp serverInfo = new DicomScp(); 
   serverInfo.AETitle = "LEAD_SERVER"; 
   serverInfo.Port = 104; 
   serverInfo.PeerAddress = GetLocalServerAddress(); 
   serverInfo.Timeout = 30; 
 
   PacsQueryClient queryClient = new PacsQueryClient(clientInfo, serverInfo); 
 
   DicomDataSet[] queryResult = queryClient.FindSeries(new FindQuery()); 
 
   if (queryResult.Length > 0) 
   { 
      PacsRetrieveClient retrieveClient = new PacsRetrieveClient(clientInfo, serverInfo); 
 
 
      //make sure you have configured the workstation database correctly for the PacsRetrieveClient to store the images. 
      retrieveClient.StoreRetrievedImages = true; //we want to store the images locally so we can view them later. 
 
      MedicalViewerLoader loader = new MedicalViewerLoader(retrieveClient); 
 
      loader.ViewerControl = viewer; 
      loader.Layout.Auto = true; 
      loader.LazyLoading = true; //this will cause to load the images for displayed sub-cells only 
      loader.ViewerPreLoadedImages = 1; //this will allow to load 1 image after and before the displayed sub-cell for fast scrolling. 
 
      loader.ProgressState += new ProgressEventHandler(loader_ProgressState); 
      loader.RequestedImageUpdated += new EventHandler<RequestedImageUpdatedEventArgs>(loader_RequestedImageUpdated); 
 
      string studyInstanceUID = queryResult[0].GetValue<string>(DicomTag.StudyInstanceUID, string.Empty); 
      string seriesInstanceUID = queryResult[0].GetValue<string>(DicomTag.SeriesInstanceUID, string.Empty); 
 
      if (loader.LoadSeries(studyInstanceUID, seriesInstanceUID)) 
      { 
         Console.WriteLine("Number of viewer cells: {0}", viewer.Cells.Count); 
         Console.WriteLine("Number of loader created cells: {0}", loader.SeriesCells.Length); 
 
         foreach (MedicalViewerMultiCell cell in loader.FindSeriesCells(seriesInstanceUID)) 
         { 
            string sopInstanceUID = loader.FindDisplayedCellInstanceInformation(cell, 0).SOPInstanceUID; 
 
            Console.WriteLine("Cell #{0} has first image with SOPInstanceUID={1}", viewer.Cells.IndexOf(cell), sopInstanceUID); 
 
 
            DicomDataSet ds = loader.GetDicom(sopInstanceUID); 
            DicomElement imageElement = ds.FindFirstElement(null, DicomTag.PixelData, true); 
 
            if (null != imageElement && imageElement.Length > 0) 
            { 
               using (RasterCodecs codec = new RasterCodecs()) 
               { 
                  using (RasterImage image = ds.GetImage(imageElement, 0, 24, RasterByteOrder.Gray, DicomGetImageFlags.AutoApplyModalityLut | DicomGetImageFlags.AutoApplyVoiLut)) 
                  { 
                     codec.Save(image, Path.Combine(LEAD_VARS.ImagesDir, sopInstanceUID), RasterImageFormat.Jpeg, image.BitsPerPixel); 
 
                     Console.WriteLine("Image with SOPInstanceUID={0} saved to {1}", sopInstanceUID, Path.Combine(LEAD_VARS.ImagesDir, sopInstanceUID)); 
                  } 
               } 
            } 
 
            string[] imagesPath = loader.GetSeriesImages(cell); 
 
            Console.WriteLine("Cell #{0} is loaded from {1} file(s):", viewer.Cells.IndexOf(cell), imagesPath.Length); 
 
            foreach (string imagePath in imagesPath) 
            { 
               Console.WriteLine(imagesPath); 
            } 
         } 
      } 
 
      loader.Close(); 
   } 
} 
 
void loader_RequestedImageUpdated(object sender, RequestedImageUpdatedEventArgs e) 
{ 
   Console.WriteLine("Image streamer for cell {0}, sub-cell {1}", viewer.Cells.IndexOf(e.Cell), e.SubCellIndex); 
} 
 
void loader_ProgressState(object sender, ProgressEventArgs e) 
{ 
   Console.WriteLine(e.Message); 
} 
 
public IPAddress GetLocalServerAddress() 
{ 
   IPAddress[] addresses; 
 
   //you can use any IP address which a DICOM server is listening to. 
   addresses = Dns.GetHostAddresses(Dns.GetHostName()); 
 
   foreach (IPAddress address in addresses) 
   { 
      if (address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork) 
      { 
         return address; 
      } 
   } 
 
   throw new InvalidOperationException("No IP Address V4 found for this machine."); 
} 
 
static class LEAD_VARS 
{ 
   public const string ImagesDir = @"C:\LEADTOOLS22\Resources\Images"; 
} 
Requirements

Target Platforms

Help Version 22.0.2022.12.7
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Leadtools.Medical.Workstation.Loader Assembly
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© 1991-2023 LEAD Technologies, Inc. All Rights Reserved.