Table 1:

Studies of radiation dose indices for pediatric noncontrast head CT

Study	Publication Year	Type	Findings
Kanal et al²¹	2015	National survey	Pediatric hospitals had lower dose indices compared with general hospitals
Kanal et al²⁰	2011	Washington State survey	Level I–II trauma centers had lower dose indices compared with Levels III–V
King et al¹⁹	2009	Bi-institutional studies	Regional pediatric hospitals had lower dose indices compared with trauma centers
Current study	2018	National study of ACR DIR	Pediatric hospitals had lower dose indices compared with other facility types
			Level I–II trauma centers had lower dose indices compared with level III–IV trauma centers or nontrauma hospitals
			Facilities in metropolitan areas had lower dose indices compared with urban and rural locations