Table 1.

Chronologic and technical evolution of multi-slice computed tomography (CT) scanners.

Year	Detector Rows	Detector z-axis Resolution (mm)	Detector z-axis Coverage (mm)	Temporal Resolution (ms)	Gantry Rotation Time (ms)
1998	4	1–1.25	20	400	500–800
2001	16	0.5–0.75	24	190–250	380–500
2004	64	0.625	40	175	330–400
2007–2008	256–320	0.5–0.625	160	140–175	280–350
2012	640	0.5	160	137	275