Complex sentence: Seeing an opportunity, he secured a computer from NASA that had been used to produce images from the transmissions of spy and weather satellites, becoming one of the first photographers to use computers to image, enhance and colourise X-ray and CT scans.
Split into simpler sentences: Seeing an opportunity, he secured a computer from NASA that had been used to produce images from the transmissions of spy and weather satellites. He was among the first photographers to use computers to produce computer-enhanced, colourised X-ray and CT scans.