Patent ID: 8045770

Claim:
A method of determining volumetric change of size over a period of time comprising: a. determining, in a first computer process executed by a processing device, a volumetric doubling time (DT) for a change in volumetric dimension of an object found in a host, the change in volumetric dimension being volumetrically-determined using three-dimensional image information measured from the object by summing voxels in the changed volumetric dimension of the object; b. establishing, in a second computer process executed by the processing device, a relationship based on an exponential change model and said period of time between volumetric doubling time and the change in volumetric dimension, the relationship comprising DT = ln ⁢ ⁢ 2 · Δ ⁢ ⁢ t ln ⁡ ( V 2 / V 1 ) , the period of time being represented by Δt; and c. determining, in a third computer process executed by the processing device, said change in volumetric dimension over said period of time.