Siemens offers a Breast tomosynthesis add-on option for MAMMOMAT Inspiration and MAMMOMAT Inspiration Prime Edition digital mammography systems. Tomosynthesis algorithm reconstructs multiple 2D breast images into an approximation of a 3D image to enable detection of tumors hidden by overlapping breast tissue. In tomosynthesis mode, the MAMMOMAT Inspiration X-ray tube rotates in a circular motion around the breast to acquire an image every two degrees while moving through an angular range of 50 degrees; the resulting 25 projections are reconstructed as 3D digital breast tomosynthesis images.