A team of scientist from Duke and Stanford universities in USA have developed a $10 microchip which when combined with Ultrasound machines are able to convert 2D images into 3D models.
 This fingernail-sized microchip mounts onto a traditional ultrasound probe – the plastic scanner that slides over gel-slathered skin to relay two-dimensional images of what lies beneath.

They are currently testing the technology in clinical trials to determine how it fits into the flow of patient care. The creators believe some of the most promising uses could be when CT scans or MRIs are not available, in rural or developing areas, or when they are too risky.

Source: http://indianexpress.com/article/technology/science/ultrasound-machines-can-convert-2d-images-into-3d-models-with-10-microchip-4917525/