A method for digital breast tomography comprising the steps of: providing a server computer including a graphics processing unit and a first memory, where the server computer: a) receives a first 3-D volumetric image of a first tissue measured at a first time of measurement; b) computes three or more generated 2-D projection images of the first 3-D volumetric image using a plurality of viewing directions; c) displays on the graphics display unit a video displaying the three or more generated 2-D projection images to identify a first viewing direction that identifies an obstruction, where the first viewing direction corresponds with a first generated 2-D projection image; d) receiving a second 3-D volumetric image, where the second 3-D volumetric image is selected from the group consisting of: (i) a second 3-D volumetric image of a second tissue measured at the first time of measurement, where the second 3-D volumetric image of the second tissue enables a structural comparison of the first 3-D volumetric image of first tissue; (ii) a second 3-D volumetric image of a second tissue measured before the first time of measurement, where the second 3-D volumetric image of the second tissue enables a structural comparison with the first 3-D volumetric image of first tissue; and (iii) a second 3-D volumetric image of a second tissue measured after the first time of measurement, where the second 3-D volumetric image of the second tissue enables a structural comparison with the first 3-D volumetric image of first tissue; and e) using an equivalent viewing direction to compute a second generated 2-D projection image, wherein the equivalent viewing direction compensates for the symmetry and asymmetry of the second tissue in the body compared with the first tissue; and f) sending the first generated 2-D projection image, the second generated 2-D projection image and viewing instructions to a remote display device which includes a graphics display unit and a second memory, where the first generated 2-D projection image, the second generated 2-D projection image and viewing instructions are stored on the second memory, where the viewing instructions determine the orientation of the second generated 2-D projection image with respect to the first generated 2-D projection image, when the first generated 2-D projection image and the second generated 2-D projection image are displayed on the graphics display unit; where the first tissue is a right breast and the second tissue is a left breast. a) receives a first 3-D volumetric image of a first tissue measured at a first time of measurement; b) computes three or more generated 2-D projection images of the first 3-D volumetric image using a plurality of viewing directions; c) displays on the graphics display unit a video displaying the three or more generated 2-D projection images to identify a first viewing direction that identifies an obstruction, where the first viewing direction corresponds with a first generated 2-D projection image; d) receiving a second 3-D volumetric image, where the second 3-D volumetric image is selected from the group consisting of: (i) a second 3-D volumetric image of a second tissue measured at the first time of measurement, where the second 3-D volumetric image of the second tissue enables a structural comparison of the first 3-D volumetric image of first tissue; (ii) a second 3-D volumetric image of a second tissue measured before the first time of measurement, where the second 3-D volumetric image of the second tissue enables a structural comparison with the first 3-D volumetric image of first tissue; and (iii) a second 3-D volumetric image of a second tissue measured after the first time of measurement, where the second 3-D volumetric image of the second tissue enables a structural comparison with the first 3-D volumetric image of first tissue; and (i) a second 3-D volumetric image of a second tissue measured at the first time of measurement, where the second 3-D volumetric image of the second tissue enables a structural comparison of the first 3-D volumetric image of first tissue; (ii) a second 3-D volumetric image of a second tissue measured before the first time of measurement, where the second 3-D volumetric image of the second tissue enables a structural comparison with the first 3-D volumetric image of first tissue; and (iii) a second 3-D volumetric image of a second tissue measured after the first time of measurement, where the second 3-D volumetric image of the second tissue enables a structural comparison with the first 3-D volumetric image of first tissue; and e) using an equivalent viewing direction to compute a second generated 2-D projection image, wherein the equivalent viewing direction compensates for the symmetry and asymmetry of the second tissue in the body compared with the first tissue; and f) sending the first generated 2-D projection image, the second generated 2-D projection image and viewing instructions to a remote display device which includes a graphics display unit and a second memory, where the first generated 2-D projection image, the second generated 2-D projection image and viewing instructions are stored on the second memory, where the viewing instructions determine the orientation of the second generated 2-D projection image with respect to the first generated 2-D projection image, when the first generated 2-D projection image and the second generated 2-D projection image are displayed on the graphics display unit;