I have the latest version if GIMP which is able to open up the DICOM images, but the images are not clear and not reconstructed properly. Is there any specific plugin which can help me?
You might want to use MicroDicom, it does the reconstruction properly. You even have a windowing function.
I suspect that GIMP only support a limited subset of the DICOM specification. Here is what I would try:
$ gdcmconv --raw --force input.dcm output.dcm
This will convert the input
input.dcm DICOM with possibly an Encapsulated Transfer syntax representation into a more conventional raw Pixel Data element.
If you do not trust GDCM for doing the conversion, you could instead try:
$ gdcminfo input.dcm
This will give you the actual important information about your DICOM instance. Once you are confident this is using one of the compressed Transfer Syntax, you can use DCMTK to do the decompression. For JPEG family you would need to use:
$ dcmdjpeg input.dcm output.dcm
And so on and so forth for JPEG-LS and RLE (namely: dcmdjpls and dcmdrle).