A method for visualizing scan data, the method comprising: forming a first processed density array from a plurality of raw density arrays, each of the first processed density array and the raw density arrays being a three dimensional array having a plurality of array elements, each element of each of the raw density arrays representing a density of a scanned portion of an object; wherein forming the first processed density array from the plurality of raw density arrays includes subtracting a first raw density array of the plurality of raw density arrays from a second raw density array of the plurality of raw density arrays; projecting the first processed density array onto a plane to form a plurality of first pixel values at a plurality of pixel locations, the projecting comprising: forming a vector for each pixel, the vector corresponding to array elements, of the plurality of array elements of the first processed density array, along a line perpendicular to the plane and passing through the pixel location; calculating a plurality of statistics for each vector; and calculating a first pixel value for each vector as a weighted sum of the statistics of the plurality of statistics, wherein the weights of the weighted sum are selected by a user during operation, through a suitable user interface; and displaying an image comprising a plurality of pixels, each pixel having a first value equal to the corresponding first pixel value; wherein the plurality of statistics comprises a vector mean, a vector maximum, and a vector standard deviation. forming a first processed density array from a plurality of raw density arrays, each of the first processed density array and the raw density arrays being a three dimensional array having a plurality of array elements, each element of each of the raw density arrays representing a density of a scanned portion of an object; wherein forming the first processed density array from the plurality of raw density arrays includes subtracting a first raw density array of the plurality of raw density arrays from a second raw density array of the plurality of raw density arrays; projecting the first processed density array onto a plane to form a plurality of first pixel values at a plurality of pixel locations, the projecting comprising: forming a vector for each pixel, the vector corresponding to array elements, of the plurality of array elements of the first processed density array, along a line perpendicular to the plane and passing through the pixel location; calculating a plurality of statistics for each vector; and calculating a first pixel value for each vector as a weighted sum of the statistics of the plurality of statistics, wherein the weights of the weighted sum are selected by a user during operation, through a suitable user interface; and forming a vector for each pixel, the vector corresponding to array elements, of the plurality of array elements of the first processed density array, along a line perpendicular to the plane and passing through the pixel location; calculating a plurality of statistics for each vector; and calculating a first pixel value for each vector as a weighted sum of the statistics of the plurality of statistics, wherein the weights of the weighted sum are selected by a user during operation, through a suitable user interface; and displaying an image comprising a plurality of pixels, each pixel having a first value equal to the corresponding first pixel value; wherein the plurality of statistics comprises a vector mean, a vector maximum, and a vector standard deviation.