Table 1.

Specifications of CT scanners from 1998 to 2007

Period	CT scanner specifications	Number of cases per scanner
1998 - November 1999	GE Highspeed Advantage CT/i 1 detector row	39
December 1999 - April 2002	GE Lightspeed QX/i 4 detector rows	60
May 2002 - November 2002	GE Lightspeed ultra 8 detector rows	12
December 2002 - November 2005	GE Lightspeed 16 advantage 16 detector rows	93
December 2005 - December 2007	GE VCT 64 detector rows	37

GE: General Electric