TG and neoplasm: The 1/Tg-DT values (median 0.12, range −0.29–0.51) were significantly smaller than the 1/hTV-DT values (median 1.99, range 1.68–4.01) (p < 0.001, Figure 2), indicating a decrease in tumor growth rate in the 12 patients with positive Tg-DT values and spontaneous regression in the two patients with negative Tg-DT values.