Table 1.

Four-dimensional CT scan dose–length product (DLP) values grouped by scanner manufacturers

Manufacturers	n	DLP mean (mGy cm)	DLP range (mGy cm)
Philips Healthcare (Best, Netherlands)	4	648	400–800
GE Healthcare (Buckinghamshire, UK)	5	2756	1440–3840
Siemens Healthcare (Erlangen, Germany)	2	1550	1500–1600