On-orbit ultrasound of posterior orbit of the fourth case of visual changes from long-duration spaceflight. In-flight ultrasound image of the right eye showing posterior globe flattening and a raised optic disc consistent with optic-disc edema and raised intracranial pressure.
The NASA website hosts a large number of images from the Soviet/Russian space agency, and other non-American space agencies. These are not necessarily in the public domain.
The SOHO (ESA & NASA) joint project implies that all materials created by its probe are copyrighted and require permission for commercial non-educational use. [2]