Table 3

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

Exam	D_eff^{^‡}	Number of patients	CTDI_vol SSDE correlation^{^*}	LDRL
Chest	Small	9	0.92	7.63
Chest	Large	21	0.80	7.63
KUB	Small	12	0.73	5.89
KUB	Large	18	0.98	7.32
T-spine	Small	15	0.91	15.39
T-spine	Large	15	0.96	17.81

↵^‡ Small D_eff: 15-24 cm, Large D_eff: 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, D_eff: effective diameter