byte array 'null' problem

[fidoZbady]

Hey,
I am developing a software to view DICOM(medical) images, using the library ( http://sourceforge.net/projects/dicom-cs ). in C#
I extract the pixel data as a byte array from the file and the try to view it using:

MemoryStream ms = new MemoryStream(byteArray);
System.Drawing.Image img = Image.FromStream(ms);

I get the ArgumentExcepti on Error: Parameter not valid.
I learn that the method returns this error when it find null values.
How can I convert those null values to zeros (0's)

Here's the whole code in case anyone needs to try it:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
//using System.Web.UI.WebControls;
using System.IO;
using org.dicomcs.data;
using org.dicomcs.dict;
using org.dicomcs.util;
using System.Drawing;

namespace usinDcmsharp
{
    public partial class _Default : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

            Stream ins = null;
            DcmParser parser = null;
            Dataset ds = null;
            FileInfo objFileinfo = new FileInfo(@"D:\Img0000001\Img0000001.dcm");
            ins = new BufferedStream(new FileStream(objFileinfo.FullName, FileMode.Open, FileAccess.Read));
            parser = new DcmParser(ins);
            FileFormat format = parser.DetectFileFormat();
            if (format != null)
            {
                ds = new Dataset();
                parser.DcmHandler = ds.DcmHandler;
                parser.ParseDcmFile(format);
                ByteBuffer byteBuffer = ds.GetByteBuffer(Tags.PixelData);
                byte[] byteArray = (byte[])byteBuffer.ToArray();

                MemoryStream ms = new MemoryStream(byteArray);
               System.Drawing.Image img = Image.FromStream(ms);
            }
            else
            {
                Response.Write("failed!");
            }
            ins.Close();
        }
    }
}

Thanks everyone,
I will sincerely appreciate any help