FIGURE 3.

(A) Maximum-intensity projections of ⁶⁸Ga-FAPI-74 PET at 10 min, 1 h, and 3 h after injection. (B–E) Direct comparison of contrast-enhanced CT (B), fusion imaging (C), and FAPI PET (D). (E and F) Superior tumor delineation consecutively improved dose application to tumor volume using volumetrically modulated arc therapy. Positive FAP uptake is marked by arrows (B–F). Green outline = GTV; orange outline = clinical target volume; red outline = planning target volume. p.i. = after injection.