Which of these scientific products was developed in the 1970s as a revolutionary medical imaging technology but failed commercially due to manufacturing complexity and high costs?

The science industry has seen countless innovations, but not all make it to market success. This trivia explores notable scientific product failures that had promising beginnings but ultimately didn't succeed commercially. These products often represented significant advances in their fields but faced challenges in adoption, timing, manufacturing, or market fit. Test your knowledge of these fascinating scientific product development stories!

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Nuclear Magnetic Resonance Zeugmatography (early MRI prototype)
Digital X-Ray Photoconductor Array
Ultrasonic Holographic Imaging System
Gamma Ray Differential Absorption Scanner