Fig. 3

FDG PET-CTs for three representative cases that received 6 months of standard treatment. Three-dimensional anterior and transverse slices at the level of horizontal blue line. a Bilateral upper lobe cavitation at Dx, which demonstrate increased intensity at M1. At M6, the left cavity has changed to fibrotic tissue with mild uptake, but the right cavity still has a thick wall and high uptake. b Failed treatment case with bilateral upper lobe cavities that retain very high intensity at M6. c Case diagnosed with recurrent disease subsequent to EOT + 1y scan. All lesions improved to moderate intensity uptake at M6, but a large new area of patchy consolidation is seen at EOT + 1y