A phantom for a medical imaging system with a matrix of spherical hollow elements is provided, with adjacent ones of the elements of a same row being interconnected by and in fluid communication through a hollow tube extending therebetween, with each element being filled with a contrasting solution. Also, a phantom is provided having a plurality of groups of interconnected hollow elements received within a sealed enclosure with the elements of a same one of the groups being in fluid communication with one another and the elements of different ones of the groups being sealed from one another, and the elements of at least one of the groups being filled with a fluid more contrasting than the fluid filling the elements of at least another one of the groups. A method of correcting patient images is also provided.
