diff --git a/src/src/IO/DICOM/DICOMPixelDataHelper.cpp b/src/src/IO/DICOM/DICOMPixelDataHelper.cpp
index 631d011..c3c233e 100644
--- a/src/src/IO/DICOM/DICOMPixelDataHelper.cpp
+++ b/src/src/IO/DICOM/DICOMPixelDataHelper.cpp
@@ -37,6 +37,7 @@ void DICOMPixelDataHelper::FinalizeCodecs() {
 
 void DICOMPixelDataHelper::GetThumbnailData(ExtendMedicalImageProperties *property, void*& data,
                                             unsigned long& length, int & sample) {
+
     double *wlww = property->GetNthWindowLevelPreset(0);
     int ww = wlww ? ((int) wlww[0]) : (512);
     int wl = wlww ? ((int) wlww[1]) : (256);
@@ -46,9 +47,8 @@ void DICOMPixelDataHelper::GetThumbnailData(ExtendMedicalImageProperties *proper
         DcmDataset *dset = fileFormat.getDataset();
         DicomImage dcmImage(&fileFormat, dset->getOriginalXfer(), CIF_MayDetachPixelData);
         dcmImage.setWindow(wl, ww);
-        length = dcmImage.getOutputDataSize(8);
-        data = new unsigned char[length];
-        dcmImage.getOutputData(data, length, 8);//按8位的位宽取数据
+        length = dcmImage.getWidth() * dcmImage.getHeight();
+        dcmImage.createWindowsDIB(data, length, 0, 8);
     }
 }