In your DICOM data sets, image modality is set to OT (“other”), which means that it is not image data.
What is “eddyogi”??
A few issues with your BMP files:
- Your BMP images store grayscale image as contain 24-bit RGB image, so before you do any processing or volume rendering, you need to convert it to a simple scalar volume using Vector to Scalar volume module.
- BMP files store image intensity on 8 bits, while you typically need >12 bits for storing full dynamic range of CT images. Reduced dynamic range means that if you change window/level of the volume then the image will appear much noisier and/or details will be lost.
- Volume rendering of a 1GB data set may require high-end graphics hardware. You may consider using Crop volume module to crop the image to the region of interest and/or make voxel size larger by a factor of 2 to 4 along each axis (set Spacing scale parameter to 4; if that works, you can try smaller values).
Volume rendering after vector to scalar conversion and resampling by a factor of 4:
I would recommend to ask developers of the software that generated these DICOM files to use CT imaging modality instead and include all mandatory DICOM fields of CT Image IOD. If this is too hard for them, then they may implement exporting to .nrrd of .mha format instead. They could also try to export into 16-bit TIFF file format (not ideal, due to no widely used standard for specifying 3D image geometry).