Convert DICOM to JPG - ERROR

Question

I'm using DICOM#(http://sourceforge.net/projects/dicom-cs/) to convert a dicom file (.dcm) to a .jpg. The code i've done:

string strFileName = nomeFile;
string strOutFileName = Server.MapPath("uploads/" + "teste");
Stream ins = null;
Dataset ds = null;
FileStream fs = new FileStream(strFileName, FileMode.Open, FileAccess.Read);
System.IO.Stream strm = fs;

Dataset imgds;
imgds = new Dataset();
imgds.ReadFile(strm, FileFormat.DICOM_FILE, 10000);

ByteBuffer byteBuffer = imgds.GetByteBuffer(Tags.PixelData);
byte[] byteArray = (byte[])byteBuffer.ToArray();

MemoryStream ms = new MemoryStream(byteArray);
Image returnImage = Image.FromStream(ms);
strOutFileName = strOutFileName + ".PNG";
returnImage.Save(strOutFileName, ImageFormat.Png);

But this give me an error:

An exception of type 'System.ArgumentException' occurred in System.Drawing.dll but was not handled in user code

In this line:

Image returnImage = Image.FromStream(ms);

Does anyone have a solution?

codekaizen codekaizen · Accepted Answer · 2015-05-23T19:34:21

It looks like the problem is in decoding the image from the stream. An ArgumentException is unfortunately a very generic error that System.Drawing classes throw when the underlying GDI library can't deal with what you give it. I'd suspect one of:

You don't have all the bytes in the array that you create from ByteBuffer so Image.FromStream can't decode it
The data from ByteBuffer is too large for GDI to make an image from
The data is not a known image format, and Image.FromStream can't decode it. (e.g. is it Raw pixel data? If so, you have to build the image differently, by writing the pixel bytes to the encoder)

Extra tip:

Using 10000 for the buffer size passed to ReadFile is not optimal. Blocks read from the underlying filesystem are a multiple of 4096 bytes, and a best-fit buffer will have the same multiple. See: Optimum file buffer read size?.

Convert DICOM to JPG - ERROR

1 Answers