Computer Vision News - March 2018

17 Application: EOS Imaging EOS Imaging can scan the patient in a standing or sitting position, giving doctors a clear idea of skeletal organization in the body. The image is acquired quickly so that the patient has very short exposure to radiation and doesn’t need to stand in the same position for a long time. A scan of the whole body takes less than 20 seconds while an adult scan of the spine takes less than seven seconds. The exam time makes a significant difference to hospitals by saving time and increasing workflow. Then they had to solve the demand for 3D imaging. EOS Imaging uses two X- ray views, frontal and lateral. By taking the two images at the same time, they gather relevant information which makes it possible to build a high- precision 3D image out of them. Because X-ray images contain so much content, they take it one step further by adding a software technology that looks into both images. Doctors can see more than just a profile of the patient. The content collected from the two X-rays provides a 3D model of the bone envelope that can include the entire spine, pelvis, or lower end of the body. When asked about the algorithmic aspect of this technology, Marie Meynadier answers: “ What we use today is something which is the step before deep learning. We identify anatomical landmarks in the two particular images. From this, we look for contours, shapes, and other landmarks. From that, we infer the best match to what is in the image from statistical modeling. That’s how we do things today. It helps us do two things. You not only get the 3D contour, but you also produce a model that is that 3D contour with a lot of anatomical content, as if the thousands of anatomical landmarks of the patient Computer Vision News EOS imaging scan conducted in standing position “A scan of the whole body takes less than 20 seconds while an adult scan of the spine takes less than seven seconds.” Application