A AB BS S T TR RA AC CT T O Ob b j je ec c t ti i v ve e: : Inf lam ma tory res pon se as so ci a ted with ra di a ti on-in du ced lung in jury (RI LI) re sults in an in cre a sed 18F-flu o ro de oxy glu co se (FDG) up ta ke on po sit ron emis si on to mog raphy/com pu ted to mog raphy (PET/CT). In this study, we ai med to analy ze the deg re e of FDG up ta ke wit hin spe ci fic iso do se re gi ons (IR) of the ir ra di a ted lung using stan dar di zed up ta ke va lu e (SUV) me a su re ments, and to cor re la te post tre at ment FDG up take with ra di ot he rapy (RT) do se pa ra me ters, pa ti ent cha rac te ris tics and the ima ging ti me in ter val af ter RT comp le ti on. M Ma a t te e r ri i a al l a an nd d M Me et t h ho od ds s: : Da ta from 30 pa ti ents with non-small cell lung can cer (NSCLC) who un der went FDG PET/CT ima ging at le ast 12 we eks (72-668 days) af ter comp le ti on of RT we re eva lu a ted. In each pa ti ent, side-by-si de vi su al re gis tra ti on of the tre at ment plan ning CT sli ces inc lu ding IR cur ves with the cor res pon ding PET/CT sli ces was per for med. Using SUV me a su re ments, FDG up ta ke le vels we re analy zed wit hin spe ci fic IRs of the ir ra di a ted lung. The sta tis ti cal dif fe ren ce bet we en SUV max of each IR was de ter mi ned. The RT do se pa rame ters, pa ti ent cha rac te ris tics and ti me in ter val bet we en RT and PET/CT we re tes ted for cor re la ti on with SUVmax of IRs. R Re e s su ul lt ts s: : The mean SUV max in the IRs of the lung that re ce i ved 2000-4000cGy was 1.51 ± 0.66 (me an ± SD) (min-max: 0.69-2.84), 4000-6000cGy was 2.67 ± 1.16 (min-max: 0.71-6.0), and >6000Gy was 3.55 ± 1.09 (min-max: 1.2-5.72). We fo und sta tis ti cally sig ni fi cant dif fe ren ces bet we en the SUV max va lu es of all IRs (SUV2000 vs. SUV4000, p= 0.001; SUV2000 vs.6000, p= 0.002; SUV4000 vs. 6000, p= 0.001). No sta tis ti cally sig ni fi cant corre la ti on was fo und bet we en SUV max and the ot her va ri ab les. C Co on nc c l lu u s si i o on n: : The fin dings of this study sho wed that, alt ho ugh so me over lap oc curs bet we en IRs, the deg re e of ra di a ti on-re la ted pa rench ymal FDG up ta ke gets hig her with in cre a sing do se le vels. Per sis tent high FDG up ta ke le vels may be ob ser ved in ra di a ti on fib ro sis are as on PET/CT even se ve ral months af ter RT.K Ke ey y W Wo or rd ds s: : Lung in jury; ra di ot he rapy; po sit ron-emis si on to mog raphy; flu o ro de oxy glu co se F18; lung ne op lasms Ö ÖZ ZE ET T A Am ma aç ç: : Rad yas yo na bağ lı ak ci ğer ha sa rı (RBAH) ile iliş ki li inf la ma tu var ya nıt po zit ron emis yon to mog rafi si/bil gi sa yar lı to mog ra fi de (PET/BT) art mış 18F-flo ro de ok sig lu koz (FDG) tu tu lu mu ile so nuç la nır. Bu ça lış mada, stan dar di ze tu tu lum de ğe ri (stan dard up ta ke va lu e; SUV) öl çüm le ri ni kul la na rak ışın lan mış ak ci ğe rin be lir li izo doz alan la rın da (İA) FDG tu tu lu mu nun de re ce si ni in ce le me yi ve te da vi son ra sı FDG tu tu lu mu ile rad yo ...