Table 3

- The proposed LDRL of the chest, KUB and T-spine based on the Deff

ExamDeffNumber of patientsCTDIvol SSDE correlation*LDRL
ChestSmall90.927.63
Large210.807.63
KUBSmall120.735.89
Large180.987.32
T-spineSmall150.9115.39
Large150.9617.81
  • Small Deff: 15-24 cm, Large Deff: 25-35 cm.

  • * Spearman correlation; p<0.05. KUB: kidneys, ureters and bladder, t-spine: thoracic spine, SSDE: size-specific dose estimate, LDRL: local dose length product, Deff: effective diameter