is there any web source where i can find free dicom images (CT or MRI)of human body to use for 3D solid models ?
right now i need human humerus bone images.
I don't think you're going to find free DICOM images, by their nature they often contain private patient data integrated into them. Any place that goes to the trouble of hosting the data will likely also charge a fee for access.
You can go to Gray's Anatomy if you want more general information: