1. A method for segmenting an object in an image, the object bordering a second object that borders a third object, the method comprising: growing, by a processor, a test object starting at a seed voxel within the object, wherein the growing comprises: within a first iteration, setting a first attribute threshold and computing a first volume of the test object based on a set of voxels having attribute values satisfying the attribute threshold; within a second iteration, setting a second attribute threshold and computing a second volume of the test object based on a set of voxels having attribute values satisfying the second attribute threshold; within a third iteration, setting a third attribute threshold and computing a third volume of the test object based on a set of voxels having attribute values satisfying the third attribute threshold; and determining a second derivative volume growth value based on the first, second and third volumes; stopping, by the processor, the growth of the test object based on the second derivative volume growth value exceeding a threshold second derivative volume growth value; and determining, by the processor, the volume of the object based on the volume of the test object with growth stopped.