“… 1 , 2 Black patients are less likely to receive any RT, 3 including use of advanced technologies. 4 , 5 , 6 Previous studies investigating disparities in receipt of PBT evaluated only a single cancer site, 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 age group, 16 or geographic region 17 and, importantly, only included patients receiving RT rather than all patients for whom RT is recommended. Because Black patients are less likely than White patients to receive any type of RT, 3 , 6 , 18 , 19 , 20 , 21 , 22 , 23 , 24 these studies 7 , 10 , 11 , 12 , 13 , 16 , 25 , 26 , 27 , 28 , 29 , 30 might have underestimated the racial disparity in receipt of PBT.…”