welcom to the world of volume sonography. aworld with added depth that enables you to obtain plans previously unattainable using conventional two-dimensional (2d) sponography . in volume sonography , the concept of the "voxel" replaces the pixel where you now have three intersecting orthogonal or perpendicular plans with which you are working _ the X,Y, and that plans . where these three plans intersect is the (referance dot ) an identifiable locatable point of interest that can be defined through its relationship with in the three plans . whith in any acquired three - dimensional (3d ) volume is an infinite number of plans , stacked on top of each other , and containing within it all the information needed to analyse that specific area or organ of interest