Size-Specific Dose Estimates of Radiation Based on Body Weight and Body Mass Index for Chest and Abdomen-Pelvic CTs

Table 4

Mean root-mean-square errors of SSDE_weight and SSDE_BMI across all verified patients (mGy, %).

Radiation dose	All patients	Males	Females	Underweight	Normal weight	Overweight	Obese
Chest
Numbers	308	213	95	38	135	127	8
SSDEweight	0.62 (6.10%)	0.53 (5.19%)	0.77 (7.69%)	0.41 (5.05%)	0.48 (4.99%)	0.71 (6.38%)	1.49 (10.86%)
SSDEBMI	0.57 (5.65%)	0.62 (6.07%)	0.46 (4.60%)	0.40 (4.93%)	0.60 (6.24%)	0.57 (5.13%)	0.84 (5.25%)
Abdomen-pelvis
Numbers	281	168	113	32	124	120	5
SSDEweight	0.76 (5.61%)	0.62 (4.55%)	0.89 (6.64%)	0.61 (5.15%)	0.71 (5.57%)	0.83 (5.67%)	1.14 (6.63%)
SSDEBMI	0.71 (5.22%)	0.55 (4.02%)	0.67 (5.00%)	0.73 (6.23%)	0.65 (5.10%)	0.73 (4.98%)	1.23 (7.15%)

Abbreviation: SSDE_weight: size-specific dose estimate based on body weight; SSDE_BMI: size-specific dose estimate based on body mass index.