The disadvantage of visualizing tomography by slices is that an important\nattribute of the object, its volume, is not easily perceived or measured. In oncology\nthis creates a problem, which is addressed here: if early detection and\nresponse to treatment are an important prognostic element, then volume is\nimportant. The literature has proposed surrogates to volume derived from\nmeasures on slices, but geometrically they are not well founded. Actual volume\nanalysis is not complex, and the proposed method applies equally well\nto organs as to tumors.
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