abstract biological biomedical bone cancellous contrast dic differential interference medical microscope microscopy spongy sub-chondral sveres trabecular vertebra vertebrae background blur breaking up bug colours computer computer screen electronic flicker glitch gremlin malfunction problem reboot reception restart screen signal static television word amplifier banner black color colour electromagnetic EMI flash frequency futuristic laser light pulse radio scope scrapbooking sound space spectrum vibration vivid wave yellow pink blue red