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

Table 2

Body size and radiation dose of 1178 patients.

Anatomic region	CT scanner	Number ()	(cm)		CTDIvol (mGy)	SSDE (mGy)
Chest	40- and 128-slice	616
	40-slice	264
	128-slice	352
Abdomen-pelvis	40- and 128-slice	562
	40-slice	239
	128-slice	323

Abbreviation: : water-equivalent diameter; : size-dependent conversion factor; CTDI_vol: volume CT dose index; SSDE: size-specific dose estimate.