Large Area Amorphous Silicon Sensor Arrays for Medical, Security and NDT (nondestructive testing) Applications dpiX is the world's leading source for high-resolution amorphous silicon (a-Si) sensor arrays. Our a-Si technology provides the foundation for some of today's most innovative solutions in medical, industrial, military and security X-ray imaging. dpiX is a global leader in a-Si technology, focusing on top quality research, engineering, development, and manufacturing. dpiX products, a-Si image sensor arrays for X-ray imaging and detection, are used by medical equipment companies world-wide.