Usually the image will be stored with arttribute property img, it stores the image in form of byte files.
In your code,
Create a FileStream and in the Reader,use the GetBytes method and store in a file and open the file uisng the FileMode property and assign the image box, imageURL to the file you just read into bytes.
you can convert the file into a bmp image of any format(even the image is in jpg format)
Dim img as New Bitmap(fd.FileName)
Hope this would help.