Advances in radiation protection related to pediatric chest computed tomography examinations

Table 1 Hybrid iterative reconstruction technology from different computed tomography vendors[41]

Vendors	GE	Toshiba	Siemens	Philips
Hybrid iterative reconstruction	Adaptive statistical iterative reconstruction	Adaptive iterative dose reduction 3D	Iterative reconstruction in image space; Sinogram-affirmed iterative reconstruction; advanced modeled iterative reconstruction	iDose 4

GE: General electric; 3D:Three-dimensional.

Table 2 Radiation conversion factors

	Head	Neck	Chest	Abdomen	Pelvis
Adult	0.0019	0.0052	0.0146	0.0153	0.0129
10-year-old	0.0027	0.0094	0.0237	0.0249	0.0219
5-year-old	0.0035	0.0121	0.0323	0.0357	0.0300
1-year-old	0.0054	0.0168	0.0482	0.0530	0.0446
Newborn	0.0087	0.0210	0.0739	0.0841	0.0701

Conversion factors (data are in mSv·mGy^-1·cm^-1) from dose-length product to effective dose as a function of region, and age from the international commission on radiological protection publication 103 recommendations[65].